Thread: Oil In Antifreeze

I bet 5 bucks its not the head gasket.

More likely cause is the rad itself. It has an oil cooler built into the side tanks, 1 for oil, 1 for trans fluid i think. I'm gunna guess that the side tank is failing and letting oil into the radiator.

Mine doesnt have an oil cooler built in. good chance its a lower intake manifold gasket.

Originally Posted by dsmuts

Mine doesnt have an oil cooler built in. good chance its a lower intake manifold gasket.

Your cooler is remote?

Originally Posted by dsmuts

Mine doesnt have an oil cooler built in. good chance its a lower intake manifold gasket.

You sure?

Alldata even says your car has one.

Originally Posted by zackp

ok well what can I do to figure it out that would be a lot easier than head gaskets.

blowing a headgasket is pretty dam hard on these cars, I give props to people who do it.

Originally Posted by Fivefingerdeathpunch

You sure?

Alldata even says your car has one.

Positive, I have a trans cooler built in but not an oil cooler. I've had the rad out twice. Parts car 99 gtp was the same way.

Kinda odd.

I believe my 97 had both (maybe) and I just looked under my hood and found only the trans cooler aswell.

So I guess I dont know.

Maybe it was an option? Or only certain years?

I even did 98 GTP on alldata, instructions for removal say disconnect both cooler lines.

and that the L82 had the option for oil cooler.

Weird but wouldnt be the first time gm threw random parts together on a car.

I take back my previous statements lol.

I guess I dont know for a fact if cars got them.

I guess I just remember seeing them on gm cars.

So really anything I said is all a lie and I am a fairy.



But to the OP, oil in the rad is a sign of somthing failing. Either a cooler tank on the side of the rad or a gasket leak in the motor cauing oil to get into the cooling system. If you dont have a oil cooler it could very well be trans fluid.

If the oil is reddish..it's from the trans cooler.

99% of the time you won't get oil in the radiator from the engine because there is almost no where including in the head that the oil is at a higher pressure than the coolant. Because the oil is in a return to pan stage and under no pressure.

FWIW the last of the 3800 engine oil coolers in the radiator that I'm aware of were the S1 3800 which phased out in 1995

dude, get a new radiator already, your trans is going to die on you.

if trans fluid is getting into your coolant whats to say coolants not getting into your trans??????? so like hurry up....you dont let something like this go, its fix it asap!