It overheats when a/c is on. It pressurizes the overflow and spits the coolant out of the relief hose on the inlet spout. Could there be a leak somewhere else that would cause that? Would a leak from the oil filter housing in the manifold cause that?
My car has 122000 miles.
My car has an automatic transmission.
Hi There, Overheating with the AC on is generally caused by a couple of possibilities. When the AC compressor is beginning to fail, this may incur an increased load on the motor as it works harder than usual to turn a bad compressor. This increased load causes the motor to work harder than it otherwise normally would, resulting in the motor overheating. The other possibility may be a cooling system that is not working efficiently. This may be caused by a clogged radiator, blocked or clogged radiator condenser fins, a water pump that is not pumping correctly or potentially cooling fans that are not working properly.
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