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2004 ml500
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196 Posts
Discussion Starter #1
i have a 97 s420 with smoke coming out of the oil filler cap even after 45 seconds of the car being started. Any ideas on what could be wrong with it? it has plenty of oil and has not been overfilled.
 

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i have a 97 s420 with smoke coming out of the oil filler cap even after 45 seconds of the car being started. Any ideas on what could be wrong with it? it has plenty of oil and has not been overfilled.
I hope you are checking it with the engine OFF, right?
 

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2004 ml500
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196 Posts
Discussion Starter #3
with the engine running and the cap tightly on the valve cover there is smoke coming out of the cap. after that i shut the car off right away and once the car was off i took the cap off and got a cloud of smoke.
 

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S600 C140 1994
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537 Posts
When I take the cap off with warm engine (engine off) I can se smoke coming out too.
I'm not worried about it. I guess it has to do with the high temp in the engine.

But thats just my opinion.:)

With smoke coming out with the cap on I guess you have a leaking cap.
 

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'14 E350, '07 CLK350, '01 SLK320
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1,147 Posts
Sound to me like you're missing the rubber seal in the cap. There shouldn't be anything coming out from under that cap if its on correctly!
 

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1992 300SD, 1986 300SDL, 1995 E420
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884 Posts
I like your car looks like a new one very nice.
 
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