coRoveRhd
Member
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.
high pitched noise - Posting new thread due to other being moderated
- Thread starter coRoveRhd
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
coRoveRhd
Member
Which assembly?
jlglr4
Full Access Member
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.
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
Member
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!
Jimmy Brooks
Full Access Member
Having an interesting issue now too. My PCV started to make that noise again a year after replacing it and one of the diaphragms was coated in oil fuzz so I decided to replace both of them today. I did everything as I should’ve and now both of them are making the whining noise when I turn off the car. I made sure all the clips are clipped onto the points of the valve cover and everything. A bit confused to say the least.
Similar threads
