Hissing from Engine
#1
Hissing from Engine
Found problem, but have question and pics. 6th post on second page.
I have a 2004 5.4 with 65k on the clock. I have noticed that when I turn off the engine there is a hissing noise coming from the pass. side (area in pic). It goes for about 30 sec and quits. I am 99% sure it is a pressurized gas escaping form a small leak somewhere, but I can't find it. I also think this hissing is happening while the engine is running, but I can't tell because of engine noise. Is this hissing normal? If not, has anyone had/heard of this before to give me a pointer on where to look/what to do about it?
I have a 2004 5.4 with 65k on the clock. I have noticed that when I turn off the engine there is a hissing noise coming from the pass. side (area in pic). It goes for about 30 sec and quits. I am 99% sure it is a pressurized gas escaping form a small leak somewhere, but I can't find it. I also think this hissing is happening while the engine is running, but I can't tell because of engine noise. Is this hissing normal? If not, has anyone had/heard of this before to give me a pointer on where to look/what to do about it?
Last edited by Woods-Rider; 08-17-2010 at 12:30 AM.
#7
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#8
mine doesn't but I have a 99. Theres a vacuum canister that reserves vacuum to operate the 4 wheel drive and the HVAC vents. might be its leaking or who knows maybe on the 04+ its supposed to do that i dunno.. I do know its located by the battery on my truck.
#11
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