Hi all,
I have a 2007 Pontiac G5 with some oil that is appearing in the coolant overflow.
I know that this is most likely a bad head gasket, but have also hear it could be from an oil cooler that some cars use to cool the oil with the engine coolant.
Also, I've heard that this is much easier to replace than a head gasket, so would like to rule it out first.
Does the G5 have an oil/coolant cooler, and if so where is it located? I've searched online and can't find an answer, so here I am.
I was going to start with a compression test to see if I can see a failed head gasket from there.
Thanks!
-Edited to add more info
I couldn't find any information about your car having an oil cooler either, but check to see of your lower radiator hose connects to the oil filter adaptor housing. Often the engine coolant enters the block by passing through the adaptor to help cool the oil. If the gasket fails oil and coolant can mix. Good luck.
Awesome, thanks for the info! I'll give that a look.