Chiltons repair book says the waterpump runs Backwards ? on the 3.7 and 4.7 engines.
SOURCE: 2000 dodge caravan
check the ground wire from the battery to engine, make sure it is tight at all connections.
SOURCE: electric fans do not run
Che if you installed the right thermo sensor, check for broken wires and if the car has the wrong coolant sensor or the wrong thermo sensor it will not work right.
SOURCE: 2003 impala is it a temp sensor or cooling fan switch
Maybe your radiator is clogged flush it out.
Based on what you are saying and what you have done so far you have a cylinder head gasket leaking combustion gases into the cooling system, this type of leak causes a gas bubble to form around the thermostat and then it will not work properly. Also when this type of leak is the problem there will be no white smoke out the tailpipe or coolant in the oil, the gasket only leaks on the compression stroke.
Testimonial: "Dennis Wei, thanks for the help on my 94 Acura, your description with the gasket leaking on the compression stroke was right on the money"
Did u end up finding out what the problem was?
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