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-   -   Blowing oil from the filler cap (http://forum.e46fanatics.com/showthread.php?t=969429)

p.mcconnell 02-04-2013 07:56 PM

Blowing oil from the filler cap
 
Hello All,

My 2004 M3 had oil leaking around the filler cap. I know this can happen so I replaced the filler cap. Now I still have oil leaking around the filler cap. Quite a bit in fact. Like about a liter every 200 miles. That stuff is expensive and you don't look cool when your ride stinks of burning oil and has smoke coming up around the hood.

So, did I just get a bad cap, or is there some other malfunction that might force oil out around the cap gasket? I'm stumped.

Thanks!

BMWCaptain 02-04-2013 08:08 PM

Look for other problems like a bad CVV or a vacuum leak. Also check your intake boots for cracks.

p.mcconnell 02-04-2013 08:22 PM

I'm not sure what the CVV is. I will look for vacuum leaks and inspect the intake boots.

Thank you.

lsbmatt 02-04-2013 08:38 PM

Quote:

Originally Posted by p.mcconnell (Post 15129761)
Hello All,

My 2004 M3 had oil leaking around the filler cap. I know this can happen so I replaced the filler cap. Now I still have oil leaking around the filler cap. Quite a bit in fact. Like about a liter every 200 miles. That stuff is expensive and you don't look cool when your ride stinks of burning oil and has smoke coming up around the hood.

So, did I just get a bad cap, or is there some other malfunction that might force oil out around the cap gasket? I'm stumped.

Thanks!

I had the same issue with my new aluminum oil cap, all I did was take it off, put it back on slowly and looked at it at eye level while doing so - - and twisted it slowly till it was tight, then took it off and did it again and carefully/slowly at eye level tightened it till firm. no more oil leak. Even when I got my car back from an oil change, same thing happened - - I did the above and no more oil leak. Slapping it on and twisting it won't work with these aftermarket caps, you have to be precise.

BMWCaptain 02-04-2013 08:40 PM

The CVV is the crankcase ventilation valve, BMWs version of a pcv valve. It is located under you intake and can cause oil problems with the engine if it gets clogged or frozen.


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