Having problems finding the cause of overheating on the vt v6 supercharged. Already done vrs kit, thermostat, and bleed radiator
Got a new radiator cap but still boiling over into overflow and starts to miss when it starts to get hot
When the car is totally cold, open the radiator cap and start the car and look for any bubbles popping in the radiator. You can also have someone rev the car and look for bubbles. Do not try this when the car is warm or hot. The car should be dead cold. If there are any bubbles present then you have exhaust gasses going into the cooling system through a cracked head.
The heater tap is located on the drivers side of the engine and is plumbed from the firewall into a pipe on the back of the tensioner pulley and it is used to make your HVAC have some hot air when you ask for it. After a time they generally crack and leak and just leave a horrible mess all over your driveway and that will make your car overheat due to coolant loss BUT in your case, it is sounding like the heads. First though I'd be checking for a coolant leak somewhere, then making sure the radiator fans work, then doing a compression test, then a TK test just to be sure that it is actually your heads and not just some random bolt somewhere that you didn't tighten, etc.
There are no coolant leaks from motor the only leaks are back through the overflow when car is turned off which is causing coolant loss. Car misses at running temp but doesn't exceed normal operating temp
Ah ok well thats a bit of a different problem then. For that I'd be checking your plugs, leads and coil packs. From there if nothing is found I'd be looking at fuel delivery so the injectors, then the sensors (Crank Angle Sensor, etc).
I replaced the water pump took car for a drive around the block when I got home the water in radiator was boiling, temp gage was normal, took it around to the mechanic he looked over it and after having the car running for a few hours he says it's fine but I need to replace the supercharger gasket. This only happen when I'm driving the car