Just a brief run down for anyone that doesnt know, been having an ongoing overheating issue that I've been trying to trace down. I've replaced the thermostat, radiator and ect sensor and tried bleeding air from the system several times (no air in system fyi). The only components left that could be a cause are a leaky head gasket (ruled this out as no bubbles in coolant when up to temp), or the water pump. Anybody have sny input on how to go about testing the water pump on our cars or is there not really a way to test it? Thanks in advance and look forward to the responses