WHAT is this white goo in my valve cover. - JeepForum.com
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Unread 11-18-2013, 08:20 PM   #1
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2010 JK Wrangler 
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WHAT is this white goo in my valve cover.

WHAT is this WHITE GOO, in my valve cover????? I have a 89' Wrangler w/4.2, and I noticed in my oil filler cap there is this whitish, tannish Goo. I haven't taken the valve cover off yet. It appears to be hanging in the top inside of the valve cover, there is none of this guk in my oil pan or radiator. It sorta looks like dirty crisco.the motor was rebuilt about 2,000 miles ago or fewer. The oil has been changed. I have never seen anything quite like this. I can not tear into it till the weekend. I have noticed I have brownish dirty spot that it blows onto the driveway on startup. This has not seemed to do this once it is started but, I really have not looked once I park & turn it off. It is sorta rusty looking brown. My gas mileage has sucked, well .... You know worse than it should. This jeep pretty much has been gone over & yet when I think I'm good, something else happens.... Yeah, right It's aJeep Thing. If anyone can give me any advice or tell me how to fix it, or where to look to figure out what this is??? All help is greatly appreciated. I am including a couple pictures if it.


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Unread 11-18-2013, 08:21 PM   #2
Mean Max
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Originally Posted by UltimatE View Post
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Originally Posted by Benderff View Post
No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

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Unread 11-18-2013, 08:29 PM   #3
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1988 YJ Wrangler 
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Yeah, water or coolant. Never a good thing. Most often it means a head gasket has blown. But I have owned a truck that would do that from condensation and it would burn off after a long run. If you're lucky it is left over coolant after the rebuild. I hope so, but I doubt it.
Dodge did not build my Jeep.
1988 Wrangler,4.2L I-6, Howell EFI JP-1, 5 Speed Peugeot, Zone 2.5" lift + 1/2" booms, BFG 31 x 10.5, Bestop.
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Unread 11-18-2013, 08:33 PM   #4
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1988 YJ Wrangler 
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Same thing on mine after I rebuilt my 4.0. Pulled valve cover off and double checked everything. Cleaned it up and changed the oil. No problems at all after that. Could be some condensation build up that mixed with the oil or prelube from the build.
My Jeep build. :)



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Unread 11-18-2013, 09:39 PM   #5
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1992 YJ Wrangler 
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Perhaps you have a case of short-trip-itis. It's a common malady cause by excessive short trips to the liquor store without reaching proper operating temperature resulting in a buildup of condensation in the oil and exhaust.
My recommendations? take that beeoch out on the highway once on a while and heat her up. Anything less than 5 to 7 miles is considered a short trip. Especially in cold humid climates.

Or, you have a bad head gasket.
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