sim68

hi

i have just noticed oil residue in the cooling system header tank, the car is an 07 sti 2.5.
i have also looked in the rad caps and there is oil film in there too. has any one had this before and WHAT COULD THE PROBLEM BE?????
its booked in to the dealers on thursday to try to find the problem and luckily still under warrenty if this turns out to be a big issue.
ANY IDEAS GUYS????????????????:

TonyBurns

iTrader: (3)

Well oil in the header tank has to come from somewhere, normally either contaminated coolant that has been put in or an issue with the head gasket. Is the car overheating? But no doubt the garage will check for head gasket failure anyway

Tony

sim68

the car is still running really well and not over heating, could it be the seals in the turbo? if it is the head gasket would there be water loss too??

thanks

coops1

iTrader: (5)

My bets are on the head gasket mate. Very simple head gasket test the garage can do with a pump like thing that goes on the header tank. It draws up air and water out the system and if there is any carbon monoxide in there the die in it changes colour. If this happens then the head gasket has gone..
I would get a non-subaru garage to check it as well just to make sure you get a correct reading before your warrenty runs out if you follow me...

sim68

thanks coops1

sim68

thanks tony

sim68

could it be any thing else??????????????//

Splitpin

No. The water circuit through the turbo is physically contained within the cartridge. There is no way a seal failure either at the compressor or turbine end could end up with oil in the coolant.

Not always, depends where and how the gasket has failed.