Need advice ASAP ( Milky residue in Oil Cap)

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Need advice ASAP ( Milky residue in Oil Cap)

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Camaro Forums >> Camaro Models >> 4th Generation >> V8 Tech >> Need advice ASAP ( Milky residue in Oil Cap)

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Need advice ASAP ( Milky residue in Oil Cap) - 2/23/2008 9:23:38 PM

Lacunaa

Posts: 13
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Joined: 12/18/2007
Status: offline

Car is 99 Z28 104,000 miles

-Runs great
-Does not smoke
-Does not get hot
-Oil on dipstick is perfectly clear

Took car in for oil change last week and guy showed me the Oil Cap. There was a white/greenish milky residue on the inside. So he doesnt know what the problem is and recommends an Engine Flush. So we do that and today I checked the cap again , looks the same.

The water pump has a leak (small) on the top/base, no clue if this is somehow related.

Can anyone tell me what this is ? I read that it could possibly be "condensation" but Im thinking something else is going on

Post #: 1

RE: Need advice ASAP ( Milky residue in Oil Cap) - 2/26/2008 1:12:11 AM

95z281LE

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Joined: 1/29/2007
Status: offline

I have seen this before in several cars and I dont know what it is but I am pretty sure it is common.

(in reply to Lacunaa)

Post #: 2

RE: Need advice ASAP ( Milky residue in Oil Cap) - 2/26/2008 7:40:32 AM

z28pete

Posts: 5575
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Joined: 8/7/2005
Status: offline

Moisture inside of the crankcase did not get enough heat to completely evaporate, so it condenses on whatever is cooler. Common with a low temp thermostat, a lot of stop & go driving, and extended idling. Nothing to worry about, but you may want to shorten your oil change period.

_____________________________

Pete

(in reply to 95z281LE)

Post #: 3