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Milky Coolant

A4Papers

By A4Papers,
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A4Papers Contributor

A4Papers

Posted
Posted (edited)

Hi, I have a 1989 r32 GTR with a bit of a problem...

There is oil in the coolant however no coolant in the engine oil, I have done a combustion gasses test on the radiator with the test coming back negative, I also hit 20 odd psi of boost with no problems ether. The engine was rebuilt in 2008

It was really milky before the flush now there is a thick layer of goop on the top - http://imgur.com/R7x6GCk

Is there any other places for oil to leak into the coolant?

Thanks

I'm very new to skylines but love it so far

Edited by A4Papers
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tridentt150v Grand Master

tridentt150v

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Posted

Some products like barsleak/chemiweld etc are a milky white when added to the radiator to stop leaks. probably need to rule that out first. But you said you did a flush??? Was this drain and refill the radiator etc?

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Duncan Grand Master

Duncan

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Posted

Also, just because there is no combustion gas in the coolant does not exclude a head gasket issue, it may be blown between the oil and water passages only.

Other causes I can think of are cracked block (unlikely unless you are making a billion KW) or the oil/coolant heat exchanger below the oil filter; if it leaked internally you would get oil/water mix.

Also, how is the underside of the oil filler cap on the cam cover

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  • 5 weeks later...
Ben C34 Grand Master

Ben C34

Posted
Posted

Sounds like the exchanger to me, oil pressure is higher than Coolant pressure therefore Coolant wont be able to make its way into the oil lines. Just a thought :)

Except when the car is off coolant will get into the oil
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A4Papers Contributor

A4Papers

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I'll update,

The exchanger had been plumbed up by the last owner and what had happened when we flushed the coolant all the gunk that was in the overflow bottle entered the radiator (We forgot to flush this :/) so now I think I'll just need to flush the coolant system weekly till most of the oil is out of the coolant

The engine is forged with a cometic mls head gasket and 400 all wheel kw if anyone wanted to know

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