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You can tell when a manifold tuning valve is bad when oil is leaking through it. You also can tell by inserting the dipstick into the valve and seeing if oil comes out through the dipstick.

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11y ago

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What cause smell like oil but no leaks?

Valve cover gaskets leaking oil onto exhaust manifold/s. Bad valve seals. (if oil level drops) Bad PCV valve. Allowing oil into intake manifold/throttle body area.


What to do with Oil leaks by manifold?

If you are talking about the EXHAUST manifold then most of the time it's the valve cover gasket that is leaking oil. REPLACE VALVE COVER GASKETS. If you are talking about the intake manifold then it has 2 rubber gaskets in the front and rear of it that leak oil real bad. If oil is on the left are right top sides of the intake manifold were the valve covers are then it will be the valve cover gaskets that are leaking oil.


How do you know if you have a bad valve?

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Normal cause is the intake manifold itself.Normal cause is the intake manifold itself.


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how do you know when valve lifters for 94 mercury villager 3.0 engine r bad


What could it be that is making my 1989 ford f150 engine run loud?

Exhause leak? Bad Muffler? Leaking or cracked exhaust manifold? Bad EGR valve?


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If there is oil coming from the exhaust manifold it generally indicates a bad valve stem seal or a worn out engine. (too much crankcase pressure)


How do you know when a PVC valve is bad?

A PVC valve is typically bad in a car if a car has an oil leak. Other signs of a bad valve include a collapsed hose and a sludge-like buildup.


How do you know if the EGR valve has gone bad?

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Have problem with leaking raditor on top of manifold very bad leak it leaking right near the head not for sure if its the headgasket or intake valve?

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