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Oil in radiator :(

33SOM

By 33SOM,
in Engines & Forced Induction

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RB30-POWER Mentor

RB30-POWER

Posted
Posted

If you look at the schematic of the oil cooler construction, it is possible for the cooler to leak oil if the o-rings were faulty, but the water canister/water part of the system is fully sealed from the oil part of the system and therefore cannot mix under any circumstances as the water part is fully sealed by the metal construction, not o-rings or seals. If that makes sense.

Therefore I don't think its possible for the cooler to be part of the problem.

Have you flushed the system at all with some sort of cleaner, before re-filling it?

One of my cars had all milky shit in it, i thought it was oil, but the owner before me must have put some "bars stop leak" in the system to stop a leak somewhere.

It is very difficult to get the crap out of the system, it kept coming back on mine until i removed the radiator and gave it a real thorough flushing.

Just a thought....

Cubes Grand Master

Cubes

Posted
Posted
Is it possible that the oil cooler near the oil filter has a problem?

No doubt the rb25's design is slightly different, however I am thinking in there, some where, there has to be a gasket that is used to attach the oil filter extension (water/oil cooler bit) to the block?

Or isn't there an extension like the pics attached of an rb20's non-water/oil cooling setup?

You never know.. The gasket may be leaking a little under pressure due to the previous engine builder stuffing up the torque settings, or using an old gasket.

It would probably be the first place I would look if you are seriously getting oil in your water, it is the easiest and quite possible given your circumstances.

Its possible its not vice versa as oil pressure is higher than water pressure.

  • 3 weeks later...
Turbo1958 Enthusiast

Turbo1958

Posted
Posted
Just wondering if it is possible for oil to get into coolant from turbo? Cause I checked under my radiator cap disarvo and found heaps of oil under the radiator cap but there was no trace of coolant in the sump oil. The block has been o-ringed and Im stuck for ideas were it could be coming from? Also the car still runs perfectly but ive obviously stopped driving it know. Anyone got any ideas??

Thanks in advace.

Sounds like to me that you have done your head gasket .. it is impossible for oil to come from the water pum.. get a presure test done on your raditor and a ccw test ..that will let you know if you are get any gases in your water ..

Ben101 Contributor

Ben101

Posted
Posted

Its a good chance your head gasket is leaking were you told by the previous owner that copper head gaskets need to be re-torqued after so many kms the re-builder would have mentioned this when he got the re-built engine i would look into that first as copper gasket are a pain in the arse you should look into getting a normal mono-torque gasket from Nissan or ACL and do a compression test

33SOM Experienced

33SOM

Posted
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Posted

Thanks for the replys. I had the head retorqued a few months ago and thought all was sweet till this happened.

Im in the process of taking the head of know and replacing it with a stock gasket. Still not sure if it was the problem but il find out soon.

Thanks.

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