Question about Mercury Cougar

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1968 merc cougar 302. over heating. need suggestiont to repair.has new rad,water pump and thermostat. head gaskets were replaced first thinking it may be that.car has been sitting for 20 years.

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  • joseyw44 Sep 10, 2008

    thermostat was removed to check for headgasket problem,its still out. you really need it to slow coolent so radiator can do its job. plugs are new as oil and filter. thanks

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Remove the thermostat, you dont need it. change the oil, plugs, and wires.

Posted on Sep 10, 2008

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Connie, Were the radiator,water pump and thermostat replaced to try and fix the over heat issue or as maintenance. Engine overheating can be caused by a lot of things, Leak in cooling system, air in system, bad rad. cap, slipping belt, faulty thermostat or installed upside down, faulty water pump, plugged radiator (inside/outside), collapsing rad hose, faulty cooling fan, leaking head gasket, sludge plugging engine water passages, poorly tuned engine, etc..
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