Help Troubleshooting Coolant system
OK back story, we race an 09 in a 4 wheeled vehicle so don't have the whole bike. Recently we broke the nipple off the water pump, some may have seen that post. We didn't know we did it and he went out for the next practice and over heated it to the point of shutting off. We have had issue with loosing water every since not in the oil and couldn't tell if it was smoking. We pressurized the system and found a couple leaky hose clamps and tightened them thinking that could be our problem. Went back last week and now as soon as he gets on track and accelerates it blows water out of the overflow, we don't run a catch tank. Back to thinking a blown head gasket now. We tried pulling the thermostat and still did it. Sone read that pressure from the cyl compression is getting into water jacket and over pressuring the system does this sound right? Oh and no water in oil, pulled the head and I see no rust in cylinders or where water was traveling across. The gasket was coming apart so wondering if it could be passing between. So with all that:
1. Is there a tolerance foe a warped head? Sitting head on glass there is one area that is about .014 gap.
2. Could a blown head gasket put pressure in water system under acceleration and make water push out over flow?