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R32 Gtr - Engine Oil Entering Coolant System

OJR32

By OJR32,
in Engines & Forced Induction

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R34GTFOUR Mentor

R34GTFOUR

Posted
Posted

You've done a compression test and found a little drop in cylinder no1, so if it was me, thats where i would be looking.

Do a leak down test, theres a good chance no1 will fail the test which more than likely means headgasket.

All the other ideas are good, but when you've got a questionable compression test i would be looking there first.

Beer Baron Grand Master

Beer Baron

Posted
Posted

but did they pressure test it hot? I know of a few now that did not show up under initial testing. car was puit back together and it happend again. crack was only opening up at temp. new head and the problem went away. it can sometimes be hard to diagnose. pourus block is less likely in my experience.

Taran Veteran

Taran

Posted
Posted
but did they pressure test it hot? I know of a few now that did not show up under initial testing. car was puit back together and it happend again. crack was only opening up at temp. new head and the problem went away. it can sometimes be hard to diagnose. pourus block is less likely in my experience.

I was told it was x-ray'd for cracks.

An x-ray will show up a crack even if it's not hot right?

Beer Baron Grand Master

Beer Baron

Posted
Posted

yeah you would hope so. but my advice would be get it leak tested HOT. people have been fooled before with 26 heads. the cracks is not always easy to find.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
Yes, i've checked the water/oil mixture tap, flux capacitor and fusion reactor and they're all fine.

Any other ideas?

No sorry. You have checked everything.. you should pobly pull the engine out and get it fully checked.

  • 2 weeks later...
Guest

Guest

Posted
Posted

could it be the block is cracked between where the head bolt goes into it and the water gallery on the outside of the bore.

99% of the time it's the cylinder 5 or 4 one EX side). The crack is usually very small, but grows. If you pull the head off you may not even see it as it starts sub-surface. Skim the block and you'll see it clear as days.

You get trace oil accumulating in your radiator, especially in your overflow? You empty it, it comes back?

The crack is small, but as the oil pressure is greater than the water pressure, it forces the oil through the crack into your water system. Over time, the crack will get bigger, and more will start on other head bolt / gallery places. The harder you drive, the faster it does it.

That is exactly what mine has done in the past

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