My RB20 is pumping coolant out of itself and I've got no fking idea why. On a very short drive just now it near on filled the overflow bottle and there was bugger all coolant in the rad. The other day I took it for a decent thrash and the overflow bottle was bubbling away and pissing fluid out, the rad was pretty much dry, but the car didn't overheat or even rise in temp.
It seems like the cooling system is under way too much pressure. About the only thing I can think of that'd cause that would be blown head gasket, but there is no oil in the coolant and absolutely no smoke coming from the exhaust under load.
Is it possible to blow a hg in just the right spot to pressurise the cooling system but no have coolant enter the combustion process or would there be another reason for this?
I've tried to bleed out the air bubbles in the system using the little bolt on the front side of the inlet mani & also using the rad cap, both times it basically never stopped blowing bubbles out. Not sure if this is a clue or not to what could be happening.
Also, first time time I noticed this problem was after popping a cooler hose off when the turbo spiked to 1.5bar