Hey guys i recently switched to mobil 1 0-40 and noticed that my catch cans have an almost green oil on them. I figured this was a headgasket issue, but the coolant resivoir doesnt vary and i dont have exesive smoke. Im going to do a compression test today for the coolant system and combustion chamber. My car is boosted at around 6 pounds. I dont have any cooling issues or any aparent leaks.

 

rent a " block tester" from autozone or similar place. this will tell u if you have a coolant leak into the combustion chamber.

 

Will do I did a compression test yesterday and every cylinder is within 10% of each other. I guess the block test will determine it.

 

Oh wow good luck man. How long have you been boosted?

 

around 8 months man its wierd though cus the milky stuff is only uptop. Nothing at the bottom (dipstick). I have crackcase vented to atmosphere also. I checked the cap again with the engine warm after a few miles driven and nothing. This only shows up in the morning and at night when its cold im starting to think its just condensation.

 

That would point to head gasket. My Subaru had the milky stuff up top as well but no smoke. It started to idle rough.