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Old 12-06-2008, 02:31 PM
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Foamy white stuff under valve cover???

I pulled my valve cover off a few minutes ago because this is the only way I can get my belt back around the a/c pulley. The motor is a 383. I got fabricated valve covers and a breather in each one. I see there is some condensation but there is also some foamy, off-white colored stuff, similar to snot. Some of it is clinging to the top of the valve cover, some is on the rockers. The car hasn't been started in about a week. I'm in Chicago where its been in the teens(temperature) all week. Is this normal? I've never seen this before on any car. Thanx in advance for suggestions and help.

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Old 12-06-2008, 03:01 PM
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Ayuh,...

That Snot is what water,+ oil look like when they get together.....

Run it up to Temp for abit,+ it'll go away....
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Old 12-06-2008, 03:15 PM
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Bondo is right...but, I am not getting why you have to take the cover off to get a belt on.....................
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Old 12-06-2008, 03:25 PM
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As long as the oil is not the same color, it will be OK.

You mentioned custom fabricated valve covers, with breathers. Install a PCV valve in one breather, and it will stop this problem. As you run it on cold days, the PCV valve will vent the moister out of the crankcase, and into the intake.

This moister is caused by a super heated engine taking a long time to cool down in extremely cold climates.
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Old 12-06-2008, 05:38 PM
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+1000 for the PCV. Not running one is terrible for oil. Its the greatest invention and drastically helps oil life.

Seriously. Use one and change the oil every 5000 miles. Don't use one and change the snot every 1000 miles.
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Old 12-06-2008, 06:52 PM
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Quote:
Originally Posted by poncho62
Bondo is right...but, I am not getting why you have to take the cover off to get a belt on.....................

I've got a March pulley set-up and to get the belt back on the a/c pulley I have to pull the compressor inward. The top of the compressor was hitting the top of the cover so I took it off.

So I install a PCV and connect it to the back of the intake?
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Old 12-06-2008, 07:29 PM
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Re: That white stuff

A big yikes! That pcv valve is a great idea. What would worry anyone is the simple fact you have moisture mixing with your oil at all. This is plain and simply a bad situation. Try the pcv first but keep an eye on the oil in the pan. If it's noticeable on the dipstick, start thinking about a blown or damaged head gasket. I'm more inclined to agree with "Carsavvycook" on this one though, especially with the breathers on the covers.
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Old 12-06-2008, 07:40 PM
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Most carbs have a manifold vacuum port on the front side, in the center of the throttle plate. Hook it up there. If you have an unused manifold vacuum port in the rear, you can also hook it up there. You just need to hook it up to a dedicated manifold vacuum source.
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Old 05-01-2011, 09:07 PM
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Hope it's condensation

HI I checked engine after dyno session; pulled oil filler cap and noticed It and breather had a foamy/watery oil mix on them; no pcv installed to carb or intaake during test; I've included a couple photos; also underside of valve covers where coated; no water showed on dip stick or visual when I drained some from pan. I hope it is condensation that got splashed and foamed up in valve covers; also you'll notice in photo around head hold down stud recesses; there was a water oil mix; could the water be coming up stud / head gasket lead from water side? can I do some type of pressure test on the water side for leaking into rocker/ valve cover area? suggestion would be appreciated. thanks John

PS; I hope photos show up when I submit post; if not suggestion on how to add to post.
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Last edited by fastlaners; 05-01-2011 at 09:27 PM.
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