plz help is head gasket bad ? 98gst

[928az 420a]

my car is pushing coolant out the reservoir tank. When I take off the radiator cap its gets bubbly or might in say foamy. I did a compression test and got 120 across if that helps...

 

[inthemidst]

Is it mixed with oil if not maybe u just need a new radiator cap. The only way to tell for sure is to do a leak down test.

 

[928az 420a]

I know the oil looks fine no coolant .just got a new cap still didn't help when I got home I need to put more coolant in .so leak down test is next thanks

 

[pauleyman]

He said radiator cap. Not oil cap

 

[928az 420a]

Should of been more specific I ment I did get a new radiator cap

 

[pauleyman]

Id do a leakdown and a coolant pressure test. What were the events leading up to this? Car overheated? Overboosted? Any other known possible issue. Head gaskets just dont fail unless they were installed improperly.

 

[928az 420a]

Hmm alright well the car has a bastard 20g on it that was installed about a month ago i keep boost at 12psi .i left a store (I did stomp on it more then usual ) and came to a red light. when I noticed my car started to over heat pulled over and saw no coolant or at least extremely low so I filled her up and keep going till I got home . Drove her this morning to work and back extremely slow trying to put no load on her and the coolant level seemed ok I think it's just under boost when I push coolant

 

[inthemidst]

Theirs also an easy way fill up the radiator and leave cap off and start car if it starts shooting the water out u definitely have a blown gasket.

 

[928az 420a]

thanks everyone for the help I am sure its the head gasket or head lifting ever so slightly since I drove her all day without hitting any boost and drove like an old lady and haven't lost any coolant