5.0L (1979-1995) MustangTechnical 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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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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1982 GT 351w(.060),10.7:1 flat top pistons, ported & polished heads, 1.94/1.60 valves,stealth intake, 750 holley dp, Comp 274XE cam, C-4 tranny with 3700 stall converter, 8.8 rear, 4:10's, subframes,electric fan.
Tons of mods that are too much to list
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.
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.
__________________ ENGINE363 forged dart engine. 300 shot!TRANNY C4 with trans brake, 3800 stall, 9in. raceconverter, hurst shifter REAR Moser 35 spline kit with spool, FRPP 3.73 gearsSUSPENION UPR Upper & lower control arms, Strange 10 way dampers, coilovers up front, BBK sub frame connectors, UPR Tube K-member & A-arms NEW Mustang TIMES COMING. 2011 Camaro SS email@example.com
I always thought it was from condensation and I've never worried about it. Almost every car I've owned has done that.
306 with all bolt ons, letter cam, ported E7's, T5 swap, full exhaust, 3:55's, 2" drop, and the worst paint you'll ever see or feel.
Dyno'd 300/316, 2745lbs-track scale
Best ET………12.4@108, 1.66 60ft on 8" ET Drags.
24 mpg (combined)
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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