Pushing coolant when hitting boost.
Thread Starter
Teching In
Joined: Mar 2024
Posts: 2
Likes: 0
Pushing coolant when hitting boost. In need of some help. I’m a newbie and can’t figure out what’s going on. 2001 Cobra with a 6.0 Gen 4 and 76/75mm turbo. Everything works great but for some reason as soon as it goes into boost, it pushes coolant into the over flow tank. Temp is under 190 every time. The other night I took it for a short ride. Went about 1/2 throttle because it was cold and saw around 4-6psi. Got back to the shop and it had about 1 quart in the OF tank. Went to get some dinner and came back an hour later and it the system still had pressure in the radiator and the OF was still the same level. Hit the relief lever on the radiator cap and the OF tank started bubbling and went down just a little. Is this normal? Oil is clean, coolant pressure test was good and there’s no other signs that would point to a HG or lifted head. There is about 150 miles on the motor and it hasn’t been run hard at all other than a couple dyno pulls to 6400rpm. It has Cometic HG and ARP Head studs. Am I just over thinking this and being paranoid?
TECH Addict
Joined: Dec 2004
Posts: 2,177
Likes: 627
From: Florida
Cracked block or head? Is it possible the heads were improperly installed?
I’d probably start with installing a coolant pressure sensor to monitor. My car has the low doller coolant pressure and temp combo sensor that goes into the stock temp sensor port on the head and it works well.
I’d probably start with installing a coolant pressure sensor to monitor. My car has the low doller coolant pressure and temp combo sensor that goes into the stock temp sensor port on the head and it works well.
