Reverse the hose and forward flush again making sure the water coming out is clear.
Audi tt heater core flush.
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How to flush the coolant antifreeze in a 2004 audi tt quattro 1 8l 4 cyl.
You can use regular water from a garden hose with the caveat that you shouldn t subject the core to a great amount of water pressure as this can damage it.
Sometimes corrosion in the cooling system can clog the heater core.
Turn on the water flow not too hard as the heater core is a bitch to replace and watch the gunk come out.
Flushing the heater core isn t completely unlike flushing your cooling system during a coolant change except that it focuses exclusively on the heater core itself.
Here s how to flush it out.
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Now is probably a good time to drain flush and bleed your whole cooling system.
Learn how to flush your heate.