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-   -   Heater valve bypass to fix "heated dashboard vents"? (https://www.sportsmobileforum.com/forums/f33/heater-valve-bypass-to-fix-heated-dashboard-vents-13588.html)

Scalf77 09-30-2014 02:30 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
If you want to use the Max AC with a controlled switch, then you need to purchase the Cold Rush also. The Max AC is just the vacuum controlled Heater/Hose control valve. (it is the part that will not let hot water to your heater core) You can use the Max AC as a stand alone item, the Cold Rush is a upgrade/add-on for the Max AC, it is a 12 volt controlled Vacuum Switch. So instead of installing the Max AC vacuum input to Port 4 of the vacuum selector switch, you install it to the output of the Cold Rush Vacuum switch. Hook the input to a vacuum source, turn the 12 volt switch on and you now have Vacuum on the output that controls the Max AC Heater/Hose control valve, you can turn off water to the heater core with the dash switch that Dieselsite provides. So the two products together will be able to do what you want.

What I was saying was for the Van, you could look at just hooking the Max AC to the Port 4 of the Vacuum Selector switch, and then you would be able to turn off water to the heater core using the Dieselsite Max Ac, this would work for three positions on the van, MAX A/C, NORM A/C and VENT. Since you really want it to work with the Vent. I have not tried that but it looks like it would work. For both trucks and vans if you hook to Port 1 (recirculation air duct door) you have a controlled vacuum source that is only on for the "Max A/C" position.

The easiest solution is to just purchase the two Dieselsite products, they come with T's, vacuum hoses, hose clamps, and pretty much everything you need for the install.

-greg

I have both products ( I have just never got around to installing them) I will probably see if I can just get away, with the Max Ac, but I won't get to it for another month at least. :b1: or i may install both, because I agree my AC works fine, I would just like to use vents when the temperature is appropriate.

Viva 09-30-2014 04:59 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Scalf77: Thanks for the explanation - much appreciated.

Quote:

Originally Posted by Scalf77
The easiest solution is to just purchase the two Dieselsite products, they come with T's, vacuum hoses, hose clamps, and pretty much everything you need for the install.

I hear you on that. I will most likely purchase the pair and then either try to install them along with someone else (moral support, at least one vehicle not in pieces...) or have someone do it (if I can find someone I trust).

Quote:

Originally Posted by Scalf77
I have both products ( I have just never got around to installing them) I will probably see if I can just get away, with the Max Ac, but I won't get to it for another month at least. :b1: or i may install both, because I agree my AC works fine, I would just like to use vents when the temperature is appropriate.

Sounds like you have the same issue/goal as I do. And you may get to it before I do, as I'm away from civilization (i.e. the ability to order things and receive them) for some weeks. When I do get to it I will report back here (and if you get a chance to do so, I would sure be interested in hearing your experience.... especially if you get to it before I do!)

Viva

JWA 10-01-2014 04:25 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by Viva
My brain is straining to remember why (or if) there was a reason that a "simple' bypass wasn't supposed to work, but I can't remember. So maybe there wasn't any reason :b7:

Viva you're not a bit dense, all this discussion with variations how your goal can be met does sound complex
mostly because you've not yet done any work with Ford's HVAC control system.

While I didn't dig too deeply into the Max Air and Cold Rush offerings I could instantly tell from their images of the kits it could be greatly simplified. My solution does what you need and in the most simple, uncomplicated and relatively inexpensive manner. Its added advantage is you'd have complete and independent control of hot coolant flow to your heater core regardless what function is set on the dashboard; Vent, Heat, Defrost, A/C or Max A/C.

As I said earlier most all vehicle systems had the heater control valve which we're going to replicate. There is no real conflict with any other power train or body system at all; think of this as we're going old skool on the heater system. :a3: The "how" is simply inserting one valve in the front heater core loop which begins at the fitting just off the thermostat housing on the front of the engine, just under the alternator.

There is no reason a single shut off valve cannot work on its own. There's no impact or interference with any power train or body system other than the HVAC portion.

Our first decision is how we're control or operate this valve; vacuum or electric only. (Keep in mind this single valve will do nothing more than stop hot coolant flow to the heater core, just one the inlet side----nothing else.) Whether we use an already present vacuum signal or just an electrical signal to open/close the valve we need an unobtrusive & easily reachable interior switch. (I've found a suitable 12 VDC valve that greatly simplifies this---it requires only installation in the heater line and a suitable switch, its here: https://www.electricsolenoidvalves.co...alves-n-o.html, the 12 VDC version.

Because that valve doesn't require integration into the vacuum system its just as simple as cutting the heater hose of choice, fitting the valve with suitable barbed hose fittings and clamp it in place. From there run one each power and ground wire and a switch to operate the valve---done.

The upside to this arrangement apart from its low cost and ease of installation is it would be independently controllable of any other HVAC function. Regardless where the Function Control is set (Heat, Vent, Defrost, A/C, Max A/C) you still have complete control of the valve. No additional vacuum hose, fittings or runs---one valve, one switch, some wire, in-line fuse holder, misc clamps cable ties etc--done.

The info we're contributing might make this seem far more complex than it is---that's due our different POV's or approaches to this. The common element is that single valve installed to interrupt hot coolant flow to the heater core, the only real differences is how we control that valve.

If you've ever successfully changed or replaced a heater hose and/or wired anything automotive your skills are in place---done. :a3: We'll talk you through this I swear!! :d5:

Sorry to yammer on and repeat myself so often. :a3:

Viva 10-01-2014 05:48 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
It does get a bit confusing, but I think part of it is just that the basic system sounds a bit complex (or maybe mysterious until one understands how it works). But I'm always up for learning.

I have changed a radiator and hoses on my car -- just substituting stock for stock -- and have done boat plumbing work (which is always fairly :a7: ). I think the big difference on the car was very simple design (1980's model) plus all the space, glorious space!, in which to work. It's the combination of extreme "cram-edness" plus being out on the road using it currently (so it's wheels + house) that makes working on the van a bit intimidating. And there just looks to be a lot going on under there. I watched/helped the mechanic who changed the spark plugs on my '97 and holy cow, we had half the engine out, I swear!

But, it's really cool that you and others here have taken an interest (and/or have the same issue). It's more "fun" to have some group momentum on a project or problem.

mikracer 10-01-2014 09:54 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
JWA's solution seems very simple. The end goal is to eliminate water from going into the heater core and this seems to do it with one mechanism. Turn the switch on and stop water from going into the core. You then select whatever you want on the AC system and not have to think about whether the system will work on a particular selection.

Thank you JWA for finding such a simple solution! Now who will be the first to fit this onto their van?!

daveb 10-01-2014 12:28 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Thanks for the link. I spent all day last week looking for a 12v valve but couldn't find one. I do want to know if it pulls power to stay closed though. For me it wouldn't matter other than using a source that shuts off unless the engine is running.

JWA 10-02-2014 05:07 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by mikracer
JWA's solution seems very simple. The end goal is to eliminate water from going into the heater core and this seems to do it with one mechanism. Turn the switch on and stop water from going into the core. You then select whatever you want on the AC system and not have to think about whether the system will work on a particular selection.

Thank you JWA for finding such a simple solution! Now who will be the first to fit this onto their van?!

I've already done this although only a few minor differences as I needed to divert coolant flow to a rear heater core.


Quote:

Originally Posted by daveb
Thanks for the link. I spent all day last week looking for a 12v valve but couldn't find one. I do want to know if it pulls power to stay closed though. For me it wouldn't matter other than using a source that shuts off unless the engine is running.


Dave when I began this some 6 years ago I too searched all over hell and high water too looking for 12 VDC operated valves. Whether those in the link existed at that time isn't known but their cost is about 1/4 or what I could find back then.

We want such a valve to always be open, not requiring power to allow flow to the heater core full time. When power is applied the valve closes thereby stopping coolant and lowering temps inside the plenum. This open without power is referred to as "normally open"; "normally closed" is just the opposite, doesn't open until power is applied.

Viva you have every skill and experience needed to do my version of this mod. Get your parts together in one pile, start early in the morning and you'd be done with the actual valve installation in less than an hour, including draining the radiator first. After that the van is 100% driveable, all that remains is locating and wiring the switch.

Just for grins and giggles a Hella rocker switch with pilot light would set this install off perfectly. Since those switches require a single 3/4" diameter hole and use standard 3/16" crimp female disconnect terminals AND can be found in a blue light (= cool) this would be a nice finishing touch. Example: https://www.ebay.com/itm/12V-16A-BLUE...7e17a5&vxp=mtr

Gooseberry 10-02-2014 08:20 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
what if you just put a better shut off valve in place of the crappy one ford uses? get one off a yota and grab the cable with the knob to adjust flow?

JWA 10-03-2014 03:56 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Ford doesn't use a cable-pull valve of any sort, not past '97 anyway. In fact the lack of a heater core shut off valve is why this thread was originally started.

IMHO a cable-pulled valve would be more difficult to install because running and mounting the cable inside the engine bay and cab would require a lot more work than the electric or vacuum actuated valve. The appearance would be distracting since it wouldn't fit the over all scheme or design of the interior.

mikracer 10-03-2014 09:53 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Can somone post a pic of the inlet hose? I'm really interested in getting the valve that JWA linked and being able to use my vent instead of AC all the time.

Viva 10-03-2014 01:44 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by mikracer
I'm really interested in ... being able to use my vent instead of AC all the time.

Vent users unite! (or we will, after we get the system upgraded) :b5:

Nothing like vents on a nice day. The fresh (free) air of having a window open without the wind noise. I can't wait to have mine back ("back" as in I had them on other vehicles).

JWA 10-04-2014 04:16 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by mikracer
Can somone post a pic of the inlet hose? I'm really interested in getting the valve that JWA linked and being able to use my vent instead of AC all the time.

I'll see if I can find an E-Series with intact stock heater hose arrangement---both my E250's with 5.4 motors have had the affected hoses modified.

I'll also try marking up or adding captions or lines to such a photo showing where one of these valves would be inserted. This might take the rest of this day, I'll see if I have anything in my past projects that would be helpful.

Stay tuned! :a3:

JWA 10-04-2014 04:56 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by mikracer
Can somone post a pic of the inlet hose? I'm really interested in getting the valve that JWA linked and being able to use my vent instead of AC all the time.

I'll see if I can find an E-Series with intact stock heater hose arrangement---both my E250's with 5.4 motors have had the affected hoses modified.

I'll also try marking up or adding captions or lines to such a photo showing where one of these valves would be inserted. This might take the rest of this day, I'll see if I have anything in my past projects that would be helpful.

Stay tuned! :a3:

Viva 10-04-2014 09:54 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by JWA
I'll see if I can find an E-Series with intact stock heater hose arrangement...

I just uploaded a couple of photos of what I think are the heater hoses on my '98 E-350 with V-10. It is stock.

It was a bit tough to get in there to get a photo (working in there ought to be fun) but I did the best I could. They are in my album.

(Actually, they are in my album twice, by accident, but when I try to delete the dups it says I"m not authorized to access the area.)

Viva

JWA 10-04-2014 11:00 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by Viva

I just uploaded a couple of photos of what I think are the heater hoses on my '98 E-350 with V-10. It is stock.

It was a bit tough to get in there to get a photo (working in there ought to be fun) but I did the best I could. They are in my album.

(Actually, they are in my album twice, by accident, but when I try to delete the dups it says I"m not authorized to access the area.)

Viva

You might need to sign out then back in again when attempting to delete your extra photos.

A small note that might be important a bit further on: please try to post your photos to this thread instead of adding them to a gallery etc. By so doing anyone using this as a tutorial AND have short attention spans (like me!) it's better being able to scroll different images all in the same place.

So then

Viva those hoses are indeed the in and out for the heater core---good find! if you could now snap a few photos of the back of the engine, dog house removed of course and show me where those two hoses connect into the engine block or whatever I can probably give you and exact cut and insert point along one of the hoses.

We'll need to ID which of those hoses is the actual heater core inlet or the one connected to a fitting nearest the thermostat housing.

In the meantime here are two photos of a 2003 E250 w/5.4. First photo shows generally how an OEM hose would come off the intake (hottest coolant) and enter the heater core. I've added a few "landmarks" to give an idea how that hose is run.

In the following photo I'm showing the hose into which our shut off valve would be inserted/installed. (This particular hose has been modified to previously allow coolant flow for a rear heater core. Because this van was taken out of service (rear heater removed); normally this hose would be a single piece.

https://www.sportsmobileforum.com/att...ec19539327.jpg

This next photo shows that splice which on this motor is exactly where our valve would be located. Simply cut that hose, insert the valve (with suitable hose barb fittings installed and sealed), tighten the clamps and the van is once again 100% driveable.

https://www.sportsmobileforum.com/att...c65fd8089f.jpg

BTW I'm suggesting this valve be ported with 3/4" female pipe threads in order to NOT significantly reduce the coolants flow path. With 5/8" hose barb fittings eventually fitted to this valve we'd have a full 5/8" ID path from the intake to the heater core which is important to those living in a four season climate. :a3:

From here we'd wire the valve to cab switch making sure we have an inline fuse too. After this we're done with this phase of the "cold air option" as this mod has been called from time-to-time.

Viva post your back-of-engine photos OR PM me for my email and you could send them directly to me. I could then edit and mark them similar to mine here with arrows, captions and other such visually appealing features. :a1:

mikracer 10-04-2014 01:16 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Thanks for the pic and captions! Is that picture looking from inside the cab with the doghouse off or is that from under the hood?

Viva 10-04-2014 02:00 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Sorry about not putting the photos in the thread. I was going to try it but then got a bit "sidetracked" by the duplicate upload. At any rate, let me try to put them here as well as in my album:





Okay, that looks like it worked!

carringb 10-04-2014 04:02 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
One note if caution: beware of using a standard hose clamp on the manifold outlet. That coolant gets so hot, the hose can delaminate starting at the "pinch" inside the bite of the hose clamp. I had recurring hose failures there because of that. The oem spring clamp works much better, or at least use a nicer hose clamp which has overlap between the sides.

Viva 10-04-2014 04:21 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
I am on my way out the door (not in the van), but I tried to take a few minutes and grab the photos from inside with the doghouse off. Unfortunately, the doghouse is being a bit recalcitrant. I'm sure I could get it off just fine (have before) except I need to run. I didn't want you to think I was just ignoring you though. It would be great to get your advice marked up right on the photos of my actual van!

I will get some photos after I get back from this (non van) trip.

Viva

JWA 10-05-2014 04:55 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by mikracer
Thanks for the pic and captions! Is that picture looking from inside the cab with the doghouse off or is that from under the hood?

Photos from under the hood Mikracer.

Quote:

Originally Posted by carringb
One note if caution: beware of using a standard hose clamp on the manifold outlet. That coolant gets so hot, the hose can delaminate starting at the "pinch" inside the bite of the hose clamp. I had recurring hose failures there because of that. The oem spring clamp works much better, or at least use a nicer hose clamp which has overlap between the sides.

That's interesting CarringB you had those failures----I check my hose connections often and so far haven't experienced the same thing. Your suggestion is well taken though, those spring clamps are amazing in their own right.

I personally use the single-ear pinch clamps or the worm drive type used most often for securing silicone hoses. Those have an inner sleeve that's wider than the clamping band and upturned edges to avoid cutting into the hose. Most of us tend to over-tighten the typical clamps anyway so anything less prone to affecting the hose itself is a great improvement.

These are the type, priced right too: https://www.summitracing.com/parts/sum-390500/overview/ Gates has one suitable for this use, their p/n: 32312.

Viva whenever you get around to your photos---those dog houses always resist when you need them removed quickly. :a3:

Gooseberry 10-05-2014 08:30 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
https://www.google.com/imgres?imgrefu...dM&h=612&w=800


would this work only $90

JWA 10-05-2014 08:40 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by Gooseberry

Yeah it would work but its a bit of overkill for this use. If all we need is to stop coolant flow there'd be no need to modulate that flow like it seems that valve and control would do.

That is an excellent replacement for the older cable-driven temperature controls but maybe just a tad more than needed for this project?

carringb 10-05-2014 11:51 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by JWA
That's interesting CarringB you had those failures----I check my hose connections :

It's also likely I'm getting a lot higher coolant temps there than typical. Moving 25,000 pounds up a 6% grade at 60 mph makes a lot of heat. And yeah, very possible I over tightened it as well. I have not had the same problem at other locations, only at the manifold outlet.

JWA 10-07-2014 05:25 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
CarringB there was a time early on in my career of DIY auto repairs I too would tighten hose clamps until the hose itself was oozing out from those little "threads" in the band---not my brightest moments. :a3: Your idea of the spring clamp on a barbed fitting is one of the best alternatives as those do hold up to temps and pressures normally found in coolant circulation connections.

Over time I've discovered several very loose band clamps, almost to the point they weren't really doing much, not of my own installation mind you. For whatever reason the connection was still pressure tight, no signs of leaks anywhere. While I still recommend a snug tightening this does show the pressures seen in typical automotive cooling systems is relatively low.

Higher temps as you experience are another issue, not sure if a silicone hose would solve that for you?

carringb 10-07-2014 10:20 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by JWA
Higher temps as you experience are another issue, not sure if a silicone hose would solve that for you?

it would, and I have some. But the clean routing of the factory 3-way heater hose (for dual HVAC) can't be beat. And it hasn't been an issue since I went back to the spring clamp. The original one lasted 350,000 miles anyways so if I get half that on he current hose, I'll be happy. By then it might be time to start thinking about something a little newer. :)

Scalf77 10-08-2014 09:09 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
OK. I did some testing this evening, I was able to hook up the https://www.dieselsite.com/maxacassis...200373l-1.aspx and test that it closed with The max A/C, A/C, and Vent setting. It would work on all the other settings OFF, Floor,Mix and Defrost. I expect that I will need to get a different T then the one that came with the kit to fit the Line I am attaching it to. To test I just hooked into port 4 vacuum line (this was conveniently located under the panel on the dash-mid passenger side). Tonight all I did was hook into this vacuum line and test the max AC control valve in all the settings. I will do a proper write up on the install when I get around to actually doing it in a couple off weeks





I applaud JWA in his DIY attitude, I have some reservations on the electrical valve holding up in the Engine Compartment. This also allows me not have to add any switches or power to get the job done, and I won't have to remember to turn it on off depending on the setting I am in.

-greg

JWA 10-09-2014 03:43 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Sounds great Scalf77 aka Greg! :a3: I'll look forward to the installation process as well as your final impressions.

There's merit in both approaches, depending which one seems better or best for any individual user will probably dictate the kit version or my ideas.

Hope the install goes as easy as the testing! :d5:

Scalf77 10-09-2014 07:15 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Quote:

Originally Posted by JWA
Sounds great Scalf77 aka Greg! :a3: I'll look forward to the installation process as well as your final impressions.

There's merit in both approaches, depending which one seems better or best for any individual user will probably dictate the kit version or my ideas. :d5:

I agree, I wouldn't hold my breath for the full install ( I've had the kit for over a year) and I am in the time of year where it won't be important for me.

This has been a great thread, as it renewed my interest in installing the kit, which actually made me look at the instructions, it was there that I noticed that there was a vacuum setting that would work in the vans that PU trucks did not have. That actually makes this a pretty easy installation "no cold rush needed", and really how it should have been designed from the beginning, but then again I am not a car designer.

-greg

JWA 10-10-2014 03:51 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Ya know Greg I'm loath to understand why the original heater control valve was replaced by the blend doors---even in theory it makes little sense. Hot coolant flowing through the heater core full time means temps above ambient will always be present, the blend door useless for a true cool air flow.

Without bashing the MaxAir and ColdRush kits my only real concern was how they seemed to work only in concert with one another. This increases the cost without necessity, IHMO anyway. I've already DIY sourced and installed something similar for far less money however my experience and lack of concern of not having a mobile vehicle during my experiments figures greatly into all that.

On another point about the electric-actuated valves I suggested---they would be slightly better than the composite cast vacuum valves the MaxAir and ColdRush kits feature. That's NOT saying those parts are one bit inferior as they appear to be the brand Four Seasons which is a huge supplier of all sorts of automotive specific coolant flow devices--I have a few in operation right now.

My point is underhood temps aren't excessive which allows the use of the composite materials with high confidence. OTOH my valve choice is a brass body rated for much higher temps and pressures than we'll ever see during normal operation. The ONLY benefit to the electric actuation is it doesn't require digging into the vacuum control system which some might find ever so slightly "intimidating".

Greg whenever you get around to installing your kit it will be great seeing it in action---as we head into winter or whatever passes for it locally "cool air flow" isn't our top priority. :a1:

Scalf77 10-10-2014 07:28 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
JWA I hear ya. I do like your solution, and probably would lean that way, but I already have the Max Air. My concerns around the valve in engine compartment are not on the valve or valve body, but the electrical turning it on or off. It has a 1.8 amp current draw to stay closed. Part of my work experience is to break things with hot and cold temperatures. Admittedly I did not really dig any deeper into it, but other things I would look at would be the possible failure modes. In failure does it get stuck in the closed position or in the normally open position. I suspect most likely open, but if it were closed then I might design differently.

The Max Air solution was a simple automotive fix for a automotive problem. In reality it did exactly what it was intended to do, turn off water to the heater when the Max A/C setting was used. It did it using standard parts used in automotive applications, so I don't really fault them for that. I do see it as a solution for a non-problem, I never had an issue with my AC temperature.

I think the Cold Rush was a afterthought, and they probably would have done better, just putting the two together in one package. Again, they used a simple automotive solution, for the problem at hand and provided an upgrade path for the existing MAX AC units they had sold. Choosing a vacuum controlled valves is really what I would have expected, they are car guys.

So I think there solution is fine, there documentation and sales propaganda need work. Your solution is definitely thinking outside the automotive box, it is more cost efficient, then purchasing the two Dieselsite products together. I suspect the cost difference gets a little tighter when comparing just the Max AC by itself (in a Van), once you add the switch, fuse, wire, etc. But, then again it would not be as full featured (having complete control) as your solution and the combined Dieselsite solution.

We have provided options, for a common complaint in our vehicles, which is a what the forum is all about.

greg

JWA 10-10-2014 08:01 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Yep, what he ^^^ said! :a3:

I do notice though Viva, the OP has been eerily quiet of late---did we scare him off or he out figuring all this out on his own? :a3:

Viva 10-10-2014 10:19 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Hi, no, you haven't scared me off at all! I'm thrilled that others are interested and the thread is humming along. I've been (and still am) "off grid" in a canyon for a week or so. Just happened to get a spot of Internet tonight, and and am skimming the forum (no time for more).

Scalf77: Admittedly I'm reading fast here (will take more time when I get back to civilization), but are you saying that because of some variation the vans have as compared to trucks, the Max Air is all that is needed to have "non heated vents"? The Cold Rush is only needed for trucks? (Apologies if this is obvious upon more careful reading.)

I'll be back for real in a few days or so.

Viva

Scalf77 10-11-2014 08:16 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Viva,

Yes, the Dieselsite Max AC will work on the vans.
Van Function Vacuum Selector Switch Position

Choosing Port 4 gives us Vacuum in the "Max A/C", "A/C", and "Vent"position

Truck Function Vacuum Selector Switch Position

Choosing Port 1 gives us Vacuum only on "Max A/C"
Port 4 is not used on Trucks, and Port 6 would also gives us Vacuum "Flr/Pnl" position, one that you probably want hot water going to the heater core.

-greg

Viva 10-11-2014 09:57 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Back online for a minute before leaving this one special canyon spot (from which I can see phone tower on a distant peak :D). Scalf 77: Thanks, I see just what you mean now with the charts. So this looks really slick, in that it is an off the shelf solution (well, still have to get it ONTO the van, which may be the hard part, but still) and we with vans don't need to do the annoying thing of having to buy the "Max AC" just to get "The Cold Rush" and have ambient vents. So we get the non-heated vents and then as a bonus also the colder AC (not that I needed that, but it can't hurt), right? Sweet, finally the vans get something better than the trucks :a1:

I agree that if I'm using the "foot" selection, I'm fine with having that be warm - it's the vents I really wanted for those nice days (60's and 70's).

So cool that you figured this out and posted it. And JWA is figuring out an alternative, too. We have such great folks here - I love this place!

JWA 10-12-2014 04:42 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Good to know you're having fun Viva---we're still slaving away working on YOUR problem here, just for you. :a1: :a1:

I've got to admit this is one of the better threads I've participated in and could actually contribute something useful. Greg's contributions give a huge insight into the Dieselsite products so there are now at least two different and effective approaches to this issue.

I'm glad to be part of this thread and a site where collaboration is part and parcel of it all. :d5:

BajaSportsmobile 10-12-2014 09:46 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Nice work guys! :b5:

Scalf77 03-17-2015 08:57 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Actually got to test this out a couple of weeks ago at the beach, while the rest of the country has been having a cold spell, we in Oregon have been having some unusually nice weather for this time of year. I just turned the knob to vent and cooled the van nicely. Works like a vent setting should now.

-greg

Viva 03-17-2015 09:03 PM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Great to hear! I bought the "Max AC, " along with a 90 vacuum line sized elbow and some extra vacuum hose (just in case). I'm going to try the routing you did. Just have to get up my nerve to cut that coolant hose (I always seem to be out in the boonies, so there is the added pressure to get it right).

'course it was easy to put it off over the past six months or so when heat was welcome.... now it's time to get cracking - this is a good motivator.

JWA 03-20-2015 05:14 AM

Re: Heater valve bypass to fix "heated dashboard vents"?
 
Just as I was wondering where Scalf77 and Viva had disappeared to....... :a3:

Glad your system is working to satisfaction Greg. I hope to install or modify my existing system this spring to also get cooler vents when full A/C really isn't necessary.

Hope to see how Viva's install goes too.

jblaze5779 07-27-2017 07:45 PM

Why couldn't I just use a manual quarter turn ball valve? I rarely ever use my heat here.


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