high pitched noise - Posting new thread due to other being moderated

[coRoveRhd]

Sorry your thread may have been marked as spam by the software not the mods. I was out enjoying a well deserved vacation so didn't check the forum for a bit. I just approved several posts.

No worries and thanks, I felt I was being the SPAM cause I couldn't delete the other threads once I figured out that the forum would auto-allow sound cloud. I think this thread is the only one needed.

 

[coRoveRhd]

There should be vacuum through the oil cap when you remove the cap while the engine is running. I would replace the whole assembly.

Which assembly?

 

[jlglr4]

I believe Jimmy is referring to the PCV assembly (valve, cap, spring). If you have the V8, I guess there are two of those - with different springs as I understand it.

To clarify on the vacuum at the oil filler hole, I believe this should be just a slight vacuum and maybe a barely noticeable amount. As I understand it, the PCV is essentially closed when the engine is at idle because the intake vacuum is quite high (pulls the diaphragm down against the intake opening and shuts off the valve). When the engine is shut off, that vacuum in the intake bleeds off. I think the squeal is the air pushing past the PCV - maybe when it gets grimy from all the oil these things seem to suck through the PCV.

 

[coRoveRhd]

Well... I am close to throwing in the towel and taking it to local indie. Tried removing both belts, soaked nearly the whole engine in carb cleaner to try to find a leak, new PCVs, new oil filler cap o-ring, a couple of other things... Thanks for all the suggestions so far!