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Disconnect both heater hoses from the heater or the engine, whichever is easier. Fabricate fittings to attach a garden hose to one of the heater connections. I direct the other heater connection into a bucket. Turn on the garden hose gradually until all the way open. Flush for 30 seconds. Reverse heater connections and back flush another 30 seconds. Reinstall heater hoses, top off radiator coolant reservoir. Done.
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∙ 10y ago
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How do you flush the heater core of a 92 Buick Roadmaster?
Either pull the hoses off of the heater core and flush the core out or pull the hoses off the block and flush the heater core through the hoses..............
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Remove the hoses going to the heater core. Use a regular water hose with a high pressure nozzle and flush both ways.
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The hoses to the heater core can be disconnected under the hood. connect a water hose to the core, and try to flush the core to unclog it.
What Is the purpose of a coolant flush with new radiator its?
You still need to flush the engine block and heater core.
