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Thread: cleaning engine bay
08-08-2012, 02:17 AM #9
I just want to jump in here and caution anyone who uses a pressure washer to clean their engine - at least for those of us with the V8s anyway. I always assumed that as long as I kept the pressure away so that nothing was directly blasted, it wouldn't cause any problems. BUT, I rinsed my engine bay with a pressure washer on Thursday, and on Sunday I got a check engine light for a defective knock sensor. My research since then shows that apparently when you get that much water in there, it can sit below the intake manifold and corrode the knock sensors. A lot of the cases of bad knock sensors (P0332 code - only the rear knock sensor ever seems to get water damage) seem to happen a couple of days after the engine bay is washed. Sometimes it goes away, sometimes it doesn't. If my problem doesn't go away once its had a chance to dry, I'll have to replace both knock sensors and the wiring harness because I don't want to have to remove the intake again if the other one fails. The cost in that case would be about $200-$250 plus about 3 hours worth of labor... that adds up to about $500 or more total if you have a shop do it (at least in my area).
Anyway, after all that, what I'm trying to say is just be sure to wash your engine bay carefully.
2008 FORD F350. My new all-around truck.
2001 Silverado Reg. Cab Not-So-Base -- SOLD
2003 Avalanche Z71. No Cladding. Check out my Mod thread. - Crashed. Will be rebuilt soon.
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