Originally Posted by JWA
In the rear only or both front and rear units?
Like a fool I gave my rear evaporator to the shop doing my initial evac and recharge after I'd eliminated the rear circuit. I do fear they simply scrapped it along with 50 other A/C system parts they had laying around.
I did keep the OEM heater core and OMG is that thing small, quite a bit smaller than the front core in fact. Considering the length hot coolant has to flow from the engine to the rear heater and back again I was surprised to see 110* leaving air temps at the exhaust vents when up to full operating temperatures.
I replaced all of the components front and rear as there seemed to be an issue with most of them, others were simply convenient while the system was apart. The rear heater core is quite small but seems to be very efficient in my van.
It is worth noting that the rear unit should be removed completely from the van using the quick release ac hose connections either beside the rear unit or under the van. I did it all in the van before realizing this "feature".
After all was said and done the system does work well and blows quite cold front and rear. I did this job myself as I was shocked to hear how much shops wanted for the work and the length of time they wanted to have the van for. It was a moderately entertaining experience besides changing the compressor...that was not thrilling.