Originally Posted by
FastLife91
doesn't matter how many times I top it up it still seems empty after 20 mins or so, however still drives for hundreds of miles without overheating and still blows hot air, I keep water in car in case needs be.
When I loosen/take off rad cap water rushes up to top of header tank, then gurgles back down near bottom
do you think it is air lock ?
I would run the car up to temp and use a hose pipe to keep filling until it overflows, it MUST be going somewhere.