Oil In Coolant

[jackal]

hey, i just found out quite alot of oil is leaking into my coolant and i was wondering if you guys could help me out by telling me what you guys think. Ive taken the car to a mechanic and they reckon it could be either a cracked head or a crack in the block, both these are an expensive option to repair. Would it also be possible that the head gasket may have something to do with the problem? eg over tightning etc..

[Cubes]

Not common to crack the DOHC heads.

Most likely a headgasket.

Are you sure its oil and not just sludge build up from the lack of coolant changes. When I first bought mine close to 5yrs ago, cleaned radiator, a block and heater core flush by myself with good new coolant never got rid of it.

Dropped a new motor in it and the sludge crap was still there. Gave it a power flush and it came good.

There must of been a heap of sludge in the heater core that my garden hose couldn't get out.

[Guilt-Toy]

take the head off and check the head gasket and PRAY

[Godzilla32]

You can get any decent workshop to do a Co2 test that will tell you if you have an issue. Should also do a compression test.

[jackal]

Not common to crack the DOHC heads.

Most likely a headgasket.

Are you sure its oil and not just sludge build up from the lack of coolant changes. When I first bought mine close to 5yrs ago, cleaned radiator, a block and heater core flush by myself with good new coolant never got rid of it.

Dropped a new motor in it and the sludge crap was still there. Gave it a power flush and it came good.

There must of been a heap of sludge in the heater core that my garden hose couldn't get out.

when i took it to my mechanic, he said he flushed it a few times and was still able to watch the oil flow through the coolant in the radiator

[antz69]

when i took it to my mechanic, he said he flushed it a few times and was still able to watch the oil flow through the coolant in the radiator

if the car is an auto...the radiator might be stuffd inside letting the auto fluid mix in with the coolant

[Cubes]

when i took it to my mechanic, he said he flushed it a few times and was still able to watch the oil flow through the coolant in the radiator

How trust worthy is this mechanic?

Is he a well known performance shop?

Grab a second opinion.. It could save you quite a bit of money.

Chances are if you are getting oil in the water then you will also get water in the oil as when you shut the car down the cooling system pressurises while the oil is un-pressurised

In the past with cracked heads on VL's I usually see water in the oil up in the pvc valve before I see water in the oil, when left long enough you then see the white crap (water) under the oil filler cap.

[jackal]

the car is a gtr and i took it to a mechanic thats recommended on sau.

[700HP-GTR33]

Head gasket......change the oil and see if there is water in it.

[arep3]

is there water in the oil or just oil in the water? i have had oil in my coolant only prob before. have u got a workshop manual for the car? look up the pics of the oil setup between the oil filter and the block. there is a sandwich plate round factory oil cooler/transfer unit. theres a coil running through it that passes the oil from the block to the filter. coolant runs around the coil. the coil in mine had corroded though. cos there was more pressure in the oil then coolant, i only had oil pushing into the coolant... its a bitch to get to but its possible to change without takin off the plenium. a lot cheaper then lookin at head gaskets.

[jackal]

As far as i know i think theres only oil in the water, but not 100% sure. The oil filter has been relocated to near the battery, could it be possible there is a problem there? I will look through the service manual too see what this transfer unit looks like.

[arep3]

in the r32gtr service manual this info is on EN-87. hope this helps