Question about 1996 Pontiac Grand Am
It's a closed system and I can't figure out how to safely back flush it. Pretty sure it's clogged up because it keeps overheating despite new water pump and thermostat. Please help!
Hi Eric, Before you back flush have the pressure radiator cap inspected together with the cooling fan operation. A defect there will result in over heating. To back flush, detach the cabin heater pipes and open the radiator return pipe and adjust the cabin climate control to fully hot. Attach a hose pipe so that water runs opposite to the normal circulation and turn on the flow. Afterwards when refilling remember to open the air bleeder, replace coolant and run water into the system until all air is expelled from the system. Close up and test run. Keep in mind that air in the cooling system will also cause overheating. Regards John
Posted on Jul 21, 2013
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Posted on Jan 02, 2017
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