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Unread 02-02-2013, 07:09 AM   #16
mickey85
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2004 WJ 
 
Join Date: Apr 2011
Location: Culver, IN
Posts: 189
You don't necessarily have a coolant issue if there is milk on your oil cap - sludge? Yup. Even if you don't see anything on the dipstick or during an oil change.

Pay attention to whether or not the motor is sucking from the overflow, or if it is bubbling into the overflow when you shut it off. If it is, you're done.

Get a CO tester from an auto parts store - if it goes yellow, patch it all up, put some stop-leak in the radiator (I'd recommend Aluma-Seal) and trade it in quick.



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It's true, you never forget your first Jeep. - 1999 Cherokee - 188,000 miles. DOA.

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Unread 02-06-2013, 08:00 PM   #17
KonLegend
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2005 WK 
 
Join Date: Jan 2013
Location: Kalkaska, Michigan
Posts: 209
Quote:
Originally Posted by leadsled jeep View Post
Keep close tabs on the underside of your oil fill cap. If it gets milky or sludgy then you've got a coolant leak into oil. Also get under jeep after sitting all night and check the FIRST drop out of a loosened oil drain plug. If its water you have coolant in your oil.

If neither of those, I'd change both your fluids and just keep monitoring for a week or so, but if ok you likely didn't do damage.

Don't drive her till you checked both of those. She won't get worse sitting there.

Obviously find what caused overheating and fix that....


To live is Christ, to die is gain. Molon Labe.
I don't entirely agree with this statement, milky or sludgy oil caps do not indicate coolant into the reservoir.

During short trips, the outside of your engine gets very warm, and then cools off, bringing in moisture into the crankcase. You actually have to drive the vehicle for quite some time before you will burn off the excess water. But, the water that doesn't get burned off, creates that milky type residue that you see on the bottom of your caps.
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Unread 02-06-2013, 08:03 PM   #18
mickey85
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Location: Culver, IN
Posts: 189
Milky residue is one thing. If it looks like butterscotch pudding glopped under your cap, you may well have a bad head gasket.
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It's true, you never forget your first Jeep. - 1999 Cherokee - 188,000 miles. DOA.

The Albatross - 2004 WJ Laredo 4.7, clackety lash adjusters, 3 gallons of antifreeze on the floorboard, 109,000 mile daily driver.
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Unread 02-07-2013, 10:21 AM   #19
KonLegend
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Location: Kalkaska, Michigan
Posts: 209
You may also want to refrain from filling your crankcase with Butterscotch pudding. The color of the sludge doesn't specify what it is, a darker sludge may have some used oil in it, not indicating a head gasket leak. The only sure way is to the specified head gasket tests, not just on what could be. You want to know for sure, and guessing won't always secure the right thought.
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Unread 08-18-2013, 02:21 PM   #20
jgcse04
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Join Date: Aug 2013
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I have same problem but there is a different that i have oil in radiator not in engine also make leak test and there no any leakage in any chamber and no problem in transmission cooler

Thanks
Nael
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