High pitch howel from engine. Not belts. Need advice.
- Thread starter Kotletachka
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Sounds like a vacuum leak to me
spartacus
Senior Member
With the motor running take the oil filler cap off and see if the noise changes if does it could be a bad PCV valve.
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gamefreakgc
Elite Member
My initial thoughts:
1. Leaking rubber gasket. I had an intake plenum gasket make that noise before. Check the tightness of all plenum bolts, especially if you used Fel-Pro gaskets (they have a small rubber seal that can vibrate if leaking making the noise).
2. PCV valve could be whistling like others said.
3. Bad bearings in the alternator or A/C clutch.
1. Leaking rubber gasket. I had an intake plenum gasket make that noise before. Check the tightness of all plenum bolts, especially if you used Fel-Pro gaskets (they have a small rubber seal that can vibrate if leaking making the noise).
2. PCV valve could be whistling like others said.
3. Bad bearings in the alternator or A/C clutch.
Dieselchessy
New member
In the video it looks like the PCV hose is sticking up in the wind with a white thing in the end of it. A whistle perhaps?
Nevermind, looks like that’s the fuel pressure regulator vent.
I’ve heard similar when folks install the throttle body but forget to connect the injector air assist hose to the bottom of the throttle body.
Nevermind, looks like that’s the fuel pressure regulator vent.
I’ve heard similar when folks install the throttle body but forget to connect the injector air assist hose to the bottom of the throttle body.
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