Odd Noise At Certain Times - E350 6.0L Diesel

[saline]

The engine fan on a 6.0L isn't only triggered by ECT. It also engages when oil or trans temps reach a certain temp.

[eddyturn]

The factory temp gauge is not even high enough to kick on the cooling fan, is it? Sounds to me like a turbo as well.

[BVerhulst]

I'm curious how many decibels you're hearing while driving. Is it Really Loud? Like, can't have a conversation with a passenger, might as well have the radio off, loud? If so, turbo hose.

[BVerhulst]

I listened again - definitely think turbo hose. Tough to say for sure because of the audio quality, but I think I hear the sound of high pressure air. And as soon as you're off the throttle (turbo spools down), the sound is GONE. You might notice your dog-house get real hot, maybe even hot plastic smell, if you've been driving long enough to really heat up the engine (doesn't look that way in this video - think I noticed your temp gauge low). This happened to me when I bought my van and drove it home - previous owner had it in storage for ~3 years. I had my traveling companion get the fire extinguisher ready when it first blew... shortly after, it threw turbo under-boost code. (P0299 or something like that?)

[crawpappy]

Originally Posted by BVerhulst

I'm curious how many decibels you're hearing while driving. Is it Really Loud? Like, can't have a conversation with a passenger, might as well have the radio off, loud? If so, turbo hose.

Nah, not that loud. I just had this turbo rebuilt at the Ford dealer a month ago.

[MacGruber]

There's no chance that it's the interior fan reverting to defrost when under load? It's common and I need to fix it on my 09 e350. Anyone repaired this with new vacuum O-rings? Sounds easy

[crawpappy]

Originally Posted by MacGruber

There's no chance that it's the interior fan reverting to defrost when under load? It's common and I need to fix it on my 09 e350. Anyone repaired this with new vacuum O-rings? Sounds easy

Good question, I haven't heard of that. Any more details or a link on that?

[saline]

Sounds like the engine fan to me. I'm pretty sure Ford patterned the E series fan off of a jet engine.

[BVerhulst]

Originally Posted by crawpappy

Nah, not that loud. I just had this turbo rebuilt at the Ford dealer a month ago.

Recent work makes me even more suspicious that it could be related to what they worked on. Maybe just a loose clamp on a turbo hose? Again, hard to tell by the audio, but it sounds like compressed air. The synchronization with rpm's (and thus, turbo boost) is too similar to my experience. Do you have a scan gauge? Can you correlate the sound with turbo boost? Keep driving it and see if it throws a code.

[Pntyrmvr]

$100 bills leaving your wallet make a similar sound...


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