Oil In Coolant

[kidafa]

just doing some net hunting on this issue and found a thread that contradicts the above thread and that oil can mix in the turbo

http://zilvia.net/f/engine-tech/318147-idk-what-do-my-rb25-anymore.html

[kidafa]

Ok so today I compression tested again so we have readings before and after the head gasket swap. Keeping in mind different compression testers have been used each time and todays tests were with A LOT healthier battery

Todays results:

Cylinder 1 being closest to radiator and 6 closest to firewall:

1. 170 2. 170 3. 162 4. 150 5. 167 6. 165

So cylinder 4 is down. I added a cap of oil and then got a reading of 172

Initial test carried out by mechanic before HG replacement:

No sure which holes they reffered to as 1 and 6 but im assuming its the reverse as what I've done?

1. 155 2. 160 3. 135 4. 145. 5. 160 6. 160.

Where too from here?

[zebra]

definatley needs a leak down test done.

Is the oil milky?

[Simon-S14]

nah i believe oil is fine. no evidence of oil mixing apart from radiator cap area.

[The Dan]

If it had a blown headgasket before and oil mixed with coolant. It will take ages for that oil to get out of the water galleries. You could flush the system 20 times and still not get it out. I'm betting it's just the old crap working it's way up to the top. It will ALWAYS end up at the cap and collect there. Try adding mineral turps to the system as that can help flush it through but unless the car is overheating and there is oil mixing through ALL the coolant, I'd say you have nothing to worry about

[kidafa]

Is the oil milky?

No sign of water in the oil at all....

If it had a blown headgasket before and oil mixed with coolant. It will take ages for that oil to get out of the water galleries. You could flush the system 20 times and still not get it out. I'm betting it's just the old crap working it's way up to the top. It will ALWAYS end up at the cap and collect there. Try adding mineral turps to the system as that can help flush it through but unless the car is overheating and there is oil mixing through ALL the coolant, I'd say you have nothing to worry about

I like your theory but when the old headgasket was removed there were no visual signs of leaks or any issues on it anywhere according to simon. When the headgasket fails and starts mixing oil and coolant is it very easy to tell by looking at the old gasket once its out of the car?

Can someone run me through how I can flush the entire block and cooling system? Ive had a mechanic do it but god knows how well he did it... Im thinking radiator out and clean all that and run a hose into one of the lines and flush it for a good 10 minutes ect ect....

[The Dan]

No sign of water in the oil at all....

I like your theory but when the old headgasket was removed there were no visual signs of leaks or any issues on it anywhere according to simon. When the headgasket fails and starts mixing oil and coolant is it very easy to tell by looking at the old gasket once its out of the car?

Can someone run me through how I can flush the entire block and cooling system? Ive had a mechanic do it but god knows how well he did it... Im thinking radiator out and clean all that and run a hose into one of the lines and flush it for a good 10 minutes ect ect....

The oil sticks to the cast iron, flushing with a hose won't get it out. It needs to be heated, mixed with the water, then when it condenses it will collect at the cap

Just keep cleaning it off each morning and keep monitoring it day to day. Eventually it will become less and less. If it gets worse, take it in to have it checked

[kidafa]

Surely there has to be a way I can give it a good flush?

Spoke to one of the techs at MTQ today in regards to if its possible for the turbo to mix the oil and coolant. He said it is possible but hes never seen it happen. Only way to tell he said would be to remove the turbo cap off one of the water lines and attach a hose to the other end and turn it on and see if water comes out either of the oil lines.... thoughts?

[Ke55pig]

Did u ever find out what it was as ive had same thing nothing wrong with head nor gasket yet still got oil in the water ??

[YLD-CHLD]

Did u ever find out what it was as ive had same thing nothing wrong with head nor gasket yet still got oil in the water ??

I'm also interested to see what you found.

Had the same problem.

[YLD-CHLD]

I'm also interested to see what you found.

Had the same problem.

Been a while!!

so what did u find?

r u willing to share?

[TerribleOne]

My RB25 has the same problem, has oil in the coolant but it runs fine. Any ideas before I go ripping the head off?

[Rolls]

If its a heap of shit put chemiweld in it and drive it until it blows, then bin it.

or compression/leak down test it like normal people, then pull head off.

Edited December 26, 2011 by Rolls

[DVS JEZ]

Post a pic up of how bad it is.

Also have u tried flushing the coolant? Might be a rust or corrosion buildup

[mico]

yeah the rusty corosion sht looks alot like oil. especially when u let it sit and sink to the bottom, its sludgy stuff.