Re: Overheating problems
If it's spitting water really bad, or if you see bubbles even though the system is purged, you could still have a leaky head gasket, or worse, a crack in the bolck or head, causing the cylinder pressure to pressurize the cooling system. One way to verify this is to take the vehicle to a station with a smog sniffer and hold it to the radiator filler neck. If it detects combustion gases, that could be the problem. Was the motor rebuilt or bored over in the past? Teh thinner cylinder walls cause more heat to be wasted to the cylinders, thus it will run hotter. The cure for this is a bigger radiator or cooling fan. You didn't mention anything about the radiator. I would have it boiled and rodded out first. Hopefully, that will cure it, and if the fan is electric, make sure it works properly.