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Why is there yellow goo on your oil cap?

Updated: 10/25/2022
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15y ago

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You either have a cracked head gasket or your engine is not running hot enough on many short trips. Either way, it's a problem and it needs to be looked at. The goo also gets down into your engine and will eventually cause it to break down. Change your oil often to keep it from building up in the engine.

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15y ago
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Q: Why is there yellow goo on your oil cap?
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