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Small amount Oil Leaking from Spark Plug Boots


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Just had my nephew put a new timing belt kit on my 2002 Lexus SC430 - replaced valve cover gaskets and Spark Plug "O-Rings" with Lexus factory gasket kit. After install I'm getting a slight leak from the Spark Plug Boots that is running out around the boots and down the rail and onto the Driver Side Exhaust and it;s starting to smoke from hitting the exhaust pipe - what could be the cause? Thinking Worn Old Spark Plug Boots?  Please let me know what you guys think

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Yes, All replaced with factory OEM O-Rings and Gaskets - looks like oil coming from between spark plug boot and 0"ring laying on rail then when car is in motion air blowing the oil along rail and onto the driver side manifold.

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Sounds like one has to get back in there and find the culprit, Maybe there is a upside down gasket on a plug ??? I hope they are reversable... 😞

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