I have a 1996 chevy impala ss, what would cause oil in my radiator overflow?

Check the transmission fluid level. Could be the trans oil cooler...it's part of the radiator. If it is, it's bad news for the transmission too.I have a 1996 chevy impala ss, what would cause oil in my radiator overflow?
more than likely it is a blown head gasket which a mechanic can fix easily for about $400. i just had that same problem a few months backI have a 1996 chevy impala ss, what would cause oil in my radiator overflow?
Each cylinder is surrounded by small water jackets that flow cooling water to the cylinder. If you have oil in the radiator overflow, it is most likely from your radiator, meaning a gasket has a leak and is leaking the oil from your crankcase to the water jacket.





You probably need to get a new head gasket to replace the old one.
Head gasket. Has it run hot sometime recently?
usually a blown head gasket,or cracked heads,or blown seals
Your top cylinder gasket may be flat.
It's a very simple equation:





Impala SS + racing/hotrodding/overrevving the Impala SS= instant blown head gasket.





Prepare to open your wallet to have it fixed. Good Luck
If there is engine oil mixed with coolant coming out of the radiator(and not just antifreeze/coolant) you probably have a cracked block or a bad gasket between the block and the head. If its just coolant leaking your overheating so check the fan belt or fan motor to make sure it turns on.
The head gasket is blown,don't driveit get it fixed.It will cost alot.