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BMW 3-Series (E90 E92) Forum
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Catalytic converter smoking
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12-19-2019, 03:48 PM | #1 |
Second Lieutenant
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Catalytic converter smoking
I removed my valve cover to replace my valvetronic motor and once I reinstalled my valve cover I started my car and started driving and smoke was coming inside my cabin from my AC being on. I popped my hood and my catalytic converter had a liquid on it and it was smoking a lot. Do you guys think it's oil from removing my valve cover or do you think my valve cover is leaking. I have a 2011 335i.
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12-19-2019, 03:54 PM | #2 |
Colonel
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If it wasn't doing it before, it could be leaking. Maybe there was some residual oil that spilled down during the gasket change. Keep an eye on it and see if it persists.
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12-20-2019, 01:21 PM | #3 |
Gateropode
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If it keeps doing it after a couple of miles driving you have a valve cover leak. The hot exhaust would burn all of the existing spillage in maybe ten minutes. Don't park the car indoor until you understand, it's a fire hazard.
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12-20-2019, 01:30 PM | #4 | |
Second Lieutenant
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Quote:
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