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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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Started the tear down process and found this....

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Old 06-30-2014, 06:56 PM   #1
import slayer
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Default Started the tear down process and found this....

So tonight I pulled the valve covers and the first thing I noticed was the oil inside the covers was milky. The second thing I discovered was #8 exhaust rockers was REALLY loose, there was at least 3/4 of play (up and down) between the pushrod and rocker and the adjuster nut was not loose!

The odd thing is that when I pulled the dip stick, the oil on it looked normal and was not milky like under the covers.

Why was the oil milky under the valve covers but not in the pan?
I'm going to assume that I had a coolant leak somewhere, which diluted the oil and wiped at least one cam lobe. I plan to tear into it further later on.
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Old 06-30-2014, 10:04 PM   #2
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I had an S10 that sort of did that. Milk in the fill cap and nothing on the dip stick. Since you're rebuilding I wouldn't worry about it too much. Probably something to do with the SG of the "milk" vs. oil and it not being "that" bad yet.
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Old 07-01-2014, 03:16 AM   #3
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I agree. Since your tearing every thing down it really doesn't matter. If it was a leaking head gasket That's something you'll replace in the rebuild. I found a lifter valley full of dirt when I tore my engine down so you can expect a few suprises.
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Old 07-01-2014, 08:10 AM   #4
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I always thought it was from condensation and I've never worried about it. Almost every car I've owned has done that.
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Old 07-01-2014, 10:50 AM   #5
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^^^that's totally possibly too depending on how much is in there.
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Old 07-01-2014, 02:51 PM   #6
Pro-comp heads rule!
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Originally Posted by dudegirl View Post
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
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Old 07-01-2014, 07:36 PM   #7
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did it look like this?
Click the image to open in full size.
when talking to me, just assume i know nothing about cars
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Old 07-02-2014, 01:31 PM   #8
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my truck had that but it was a tbi 350 with hard miles on it and I had just done head gaskets so needless to say I was a bit upset so I cleaned it up and it was fine after I ran seafoam through the oil before I changed it
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Old 07-02-2014, 01:31 PM
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