yellow foam in oil? - Maintenance and Repair Forum

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yellow foam in oil?
Monday, April 02, 2007 7:59 PM
pulled the dipstick to check oil levels on my moms car and its got a yellow foam build-up on the end of the dipstick. I then pulled the oil cap and it had the same build-up there.

any ideas on the cause

apparently she knew of this before and asked a mechanic about it, he said it could be the head gasket, that makes no sense to me though.

2.2 eco, auto with A/C

Re: yellow foam in oil?
Monday, April 02, 2007 8:26 PM
water in oil
Re: yellow foam in oil?
Tuesday, April 03, 2007 5:37 AM
Foamy oil = blown head gasket, 9 out of 10 times. Have cooling system pressure and compression tests done to confirm.




1989 Z24 Convertible - Dust Covered
2006 tC - Dust Covered, but driven more
Re: yellow foam in oil?
Tuesday, April 03, 2007 10:14 AM
ZlineDavid wrote:

Foamy oil = blown head gasket, 9 out of 10 times. Have cooling system pressure and compression tests done to confirm.


X2


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Re: yellow foam in oil?
Tuesday, April 03, 2007 12:35 PM
foam in the oil is really not 9 times out of 10 the HG. Most 2.3 make foam even new. Humidity will do it. Nothing to worry about.

Milky oil is a bad sign but a bit of foam is no problem.



Gilles
2.3 Ho

Re: yellow foam in oil?
Tuesday, April 03, 2007 2:03 PM
That yellow gunk can be caused by cold temps or short trips and the car not being able to warm up to burn it off (condensation like Mfk-223 said)

Rob




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