Please Help!

[yuryb]

Hi Guys, My Name is Yury and I own a 1990 Skyline GTR. I'm actually from Canada but I need all the help I can get diagnosing a problem....

Here's my problem....I seem to be getting oil in my coolant. I have flushed the system numerous times but the oil just seems to keep finding its way back in. When I check the dipstick, the oil level doesn't drop very much, in fact very little. I know one possibility could be the head gasket, but I was wondering if anyone could suggest somethign else. The oil is clean of coolant. Also, my oil seems to turn black fairly quickly, I was wondering if that is normal or not. I am using royal purple 5W40. Any suggestions would be greatly appreciated.

Thanks

[R33S2]

Black oil is usual, change at 5000km's yeah?

The head is the most likely spot but I cant see how water is not in your oil as well.

[(OO)SKYLINE(OO)]

Try a Air Pressure Test when you do a coolent flush...

So after topping up all the coolent in the radiator, do the test then.

The pressure metre should stay and not move.

If the pressure goes down, there might be a little leak...

Might have to get the engine seals / heads checked to see any leakage. Thats all I can think of...

[NA_Goodness]

It would be the head gasket mate. I've never heard of anything else causing coolant and oil to mix. Try driving up a steep hill. If your car is over heating when you get to the top it has been confirmed. Also, try and get hold of a CO2 sensor tool. That should tell you whether you have a head gasket leak or not. Otherwise take it to a mechanic. I wouldnt drive it too much though, its not too good for the engine

[NA_Goodness]

Welcome to SAU as well!

[Jmaac]

A nice crack in the block will do that too

But more likely a head gasket, do a leakdown test

Edited March 24, 2008 by Jmaac

[yuryb]

Thanks for the input guys. One thing I forgot to mention though was that I would have to top off the coolant almost everyday. So I must have a leak. I guess the only way to find out whats wrong is to take off the head. Thanks again for the advice.

[Jmaac]

A leakdown test of the cooling system and/or block/head will tell you exactly whats wrong, aswell as many other things

If your missing water then its being sucked into the engine or forced out through the o/flow. Look for white milky residue under your oil filler cap, or excess moisture from the tailpipe on initial startup, bubbles in the coolant etc.

The alloy head can crack pretty easily also