Pontiac Repair: Headgasket, crank case, blowby

Question
Hi

Forgot to add

Vehicle has about 85 k on engine

Also,coolant had an oily look to it
also shows signs of an intermix on inside of oil cap and pcv
when it runs ok, if i take oil cap off,smoke comes up out of engine like excess blowby maybe?

like i said,couple times it started up cold and acted fine while the other times it had those symptoms

TIA
Joe

Answer
The intermix more likely is from the inatke leaking into the crank case first before the over heat started. Intermix is NOT good. do not keep driving it these engines have a tendency of locking up the cam shafy in the block due to the lack of lubrication.