I've recently installed a water/oil cooled T3 turbo onto my 18RGEU motor. However when the motor is under boost water is expelled from the overflow tank.
I'm using the heater lines to cool the turbo (heater no longer connected only the turbo) and i've installed a three core radiator. I've tested the compression of the engine as i have recently installed a 2mm copper head gasket and was worried about the seal.
I doubt the gasket is the problem anyway as the cooling system is fine as long as i keep the car off-boost. (Which isn't much fun ).
I was curious whether a higher rated radiator cap is needed as a turbo has been introduced? Currently i'm using a 13psi one.
Yes your head gasket is blown, as you get the car on boost the compression ratio gets higher and the engine will blow the water out the rad cap from the pressure. If you are really unlucky you could have a cracked head.
Yeah, i'm suspect to a crack in the turbo myself. The guy from dynamic turbos reckons it's unlikely but I think i'll get the turbo sussed out anyway. Has anyone had this problem before?
The head gasket is under a large amount of pressure normally and it's holding that fine. I find it strange that the increased pressure (with my pissy amount of boost) would be enough to suddenly leak compression into the cooling system.
But if the turbo is ok the gasket/head are the only other possible sources of the problem as far as i can see. So i'll probably get the turbo checked out (as i don't really know it's history) and then check the gasket/head after that.
18RG Turbo Cooling System Problems
Sun, 22 December 2002 06:43
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just a idea.....