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What are some possible causes of oil fouled spark plugs?

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βˆ™ 2014-07-03 19:56:41

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The culprit is oil collecting in the cylinder and not being burnt off. Generally it is caused by 1) leaky valve seals, 2) worn rings, 3) leaking head gasket.

The first check should be a compression test to verify if the rings or heads are leaking. If they are fine the only thing left is the valve seals. Not an easy fix but can be done by a home mechanic with some effort.

2014-07-03 19:56:41
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Q: What are some possible causes of oil fouled spark plugs?
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What is a fouled spark plug?

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