I wrote a while back about a engine squeel that only appears when the engine is warm. I replaced the timing chain, serp belt and pully and tensioner, waterpump, upper intake, pcv valve, harmonic balancer, ect. It still squeels.
I found if I take the Oil Fill Cap off the squeel goes away. I replace the O-rings on the Cap and Filler Tube but it still squeels but it'* hard to determine where the squeel is coming from. The weird thing is the Pressure pulling on the Oil Fill Cap ... It feels like a Vacume cleaner is sucking on it. But when you pull the cap off there'* no more squeel.
Is this normal to have such suction/vacuume in the engine?
I think it'* not squeeling from the cap, but when I remove the cap it'* releases the vacuume pressue from squeeling somewhere else. What might be causing it to have so much vacuume? Could it be the PCV valve not working? Where would the squeel be coming from? It sounds like the rear of the motor area but it'* real hard to pinpoint. Maybe it'* causing a vacuume leak elsewhere that is the squeel?
Any help from you mechanics out there would be much appreciated .... This thing is driving me crazy!!
The car is a 95 bonny SE with 210,000 miles but burns no oil
Thanks for you help