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Discussion Starter · #1 ·
Was changing my coil packs today when I found a fair bit of oil on the spark plugs and the coils. Cleaned it up and put the new coils in. Oil was at half so I topped it off until full. Checked again a week later and its back to half with oil again on the spark plugs and coils. What seals and gaskets do I need to replace?
 

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Typically a bad valve gasket is the cause of this. I haven’t changed one on a Smart, but the grommets that’s stop the oil from leaking into the spark plug bay can become hard and cracked resulting in oil leaking into and onto the plugs. I’ve changed the valve gasket on a Hyundai and actually have to do it on a Scion tC here soon. It’s not a terribly hard job, but just need to make sure the old adhesive for the gasket is cleaned well and the new one sits 24 hours.


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