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How will a car act if the valve stem seals are bad?

In: Car Starting Problems [Edit categories]

Answer:

If the valve stem seals are bad the intake valves will "suck" oil into the cylinders. One common indicator of worn valve stem seals is to take your foot off the accelerator for several seconds when going downhill, then watch for smoke when you step on the accelerator again. If you see a puff of BLUISH smoke, you probably have bad valve stem seals. The catalytic converter can become oil fouled so that would be another indicator that you might have valve stem seal problems.

First answer by Redbeard. Last edit by Redbeard. Contributor trust: 3551 [recommend contributor ]. Question popularity: 7 [recommend question].

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Relevant answers:

How do know if the valve stem is bad for a car tire?
To check for a leak, apply soapy water to the stem and look for bubbles.
Can you use oil treatment for bad valve stem seals?
No, oil treatment will react in the same way as regular oil. Replace the valve seals.
Where is the valve stem of a car?
You may be referring to the valve stem on each wheel.
How does the car act when the turbo is bad?
poor pick up not running smoothly
Why valve stem seal?
Valve Stem Seal are designed to make sure no oil will spill into the engine piston as it eat the gas coming from the Fuel injector through the exhaust manifold.