Layer of scum under oil filler cap? (2005 Z4, M54 engine)

NYZ4Jack · 12-22-2011, 11:48 PM

First time changing the oil in this car today and I noticed the bottom of the oil filler cap had a layer of scum. It doesn't look white or foamy. Should I be concerned?

Car runs perfectly fine and pulls strong. Oil doesn't smell funny and wasn't abnormal in color or milky or anything like that when I drained it. I don't think I'm loosing coolant either but I've only had the car for a month so I wouldn't really know - but the coolant level is normal.

Beedub · 12-23-2011, 02:15 AM

thats just condensation from a short startup, take her out for a long run and it'll dissappear... dont worry OP :-)

Mirko · 12-23-2011, 07:55 AM

^^ whs

If persistant after longer drives and coolant level dropping your headgasket could be gone.

NYZ4Jack · 12-23-2011, 11:44 PM

thanks guys. i need a second opinion to reassure me. a friend of mine also told me the same thing and said it's probably because it was sitting on the dealer's lot for a few months and only had short runs/test drives.

i'll keep an eye out on the coolant level and the cap.

thanks and happy holidays!

12-22-2011, 11:48 PM	#1
NYZ4Jack Private 18 Rep 94 Posts Drives: 2005 Z4 3.0i Join Date: Nov 2011 Location: New York, NY iTrader: (0)	Layer of scum under oil filler cap? (2005 Z4, M54 engine) First time changing the oil in this car today and I noticed the bottom of the oil filler cap had a layer of scum. It doesn't look white or foamy. Should I be concerned? Car runs perfectly fine and pulls strong. Oil doesn't smell funny and wasn't abnormal in color or milky or anything like that when I drained it. I don't think I'm loosing coolant either but I've only had the car for a month so I wouldn't really know - but the coolant level is normal.
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12-23-2011, 02:15 AM	#2
Beedub Major General 423 Rep 5,329 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	thats just condensation from a short startup, take her out for a long run and it'll dissappear... dont worry OP :-) __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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12-23-2011, 07:55 AM	#3
Mirko Major 182 Rep 1,031 Posts Drives: E86 Z4M, E90 328i, E84 X1 Join Date: Apr 2011 Location: Toronto iTrader: (2)	^^ whs If persistant after longer drives and coolant level dropping your headgasket could be gone.
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12-23-2011, 11:44 PM	#4
NYZ4Jack Private 18 Rep 94 Posts Drives: 2005 Z4 3.0i Join Date: Nov 2011 Location: New York, NY iTrader: (0)	thanks guys. i need a second opinion to reassure me. a friend of mine also told me the same thing and said it's probably because it was sitting on the dealer's lot for a few months and only had short runs/test drives. i'll keep an eye out on the coolant level and the cap. thanks and happy holidays!
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