Boosted 5.7 keeps pushing coolant out reservoir.
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Teching In
Joined: Oct 2024
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From: Lil town in o,hia
Boosted 5.7 keeps pushing coolant out reservoir. Back story last year car was a stock 5.7 in my 2002 t.a. over the winter I installed a on3 turbo kit and pulled the 5.7 to put in ring gap all new gaskets and converted to e85. Fired the car up and did my fluid leak checks and started to dial in the tune. Was always rich never picked up any knock. Thought I had the air completely removed and after about 50 miles of so any time I got into boost 8 psi max the car started to push coolant out the overflow. This was after a hand full of 8 psi passes So by now my gauge shows 250 plus and the scanner showed the same. I had Pusher fans on the stock radiator do this. So I went to a stand up radiator with puller fans, still pushed out coolant. Pulled the heads and had them checked and installed new head gaskets and re torque the studs. Still pushed coolant. Replace the thermostat and water pump.....still pushed coolant. The turbo has coolant lines i tapped into. I did have one line from the turbo going to the 5/8 line and the other line going to the 3/4 hose. I have sense changed the turbo lines to both lines going to the 5/8 line. I cant understand who can see the water rise and fall in the overflow tank when I am on and off the throttle. No water out the pipes and the upper radiator hose does not feel like it has a lot of pressure. Fells lime it bypassing the cap and going straight into the overflow. It has had 3 different caps by the way.
Last edited by Onomoto; Yesterday at 09:50 PM. Reason: Typo
