Discussion Starter · #21 ·
If that might be the problem on my van, but how could the system hold a pressure test for 3 hours as mechanic stated. Also I have noticed a rust bubble on the front of the rear passenger wheel opening ....about 8 inches up from the bottom of body. Do the lines run inside the body at the wheel well opening or under, around etc. Maybe this is indicative of leakage. I reckon I need to do some interior trim tear down and get this thing in the air and take a good look. Still, I am having no air lock problems with thermostat out, but no heat of course. Will check coolant levels tomorrow. Always dark when wife gets home. Also, can anyone tell me what the 3" heater valve that lives between the heater hose and heater core hose is for? No one has an answer. Could this be malfunctioning in not getting a true pressure test? One mechanic says it is some type restrictor to prevent a sloshing sound in the heater cores when first starting vehicle. Lastly, there are no wet carpet areas in the front or rear of the vehicle.