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I own a 2006 chevy 2500HD with a 6.0L gas engine. I need to do a coolant flush. Through lots of research I found the flush valve for coolant systems was discontinued by GM in 2003. There is still a valve on my radiator however it looks to be plugged. Before removing the radiator hose to do a reverse flush (no radiator cap only a surge tank) I need to drain coolant above that level. Is there a way to do this or do I use the surge tank cap as I would the actual radiator cap?

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stormbrewin
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SOURCE: How can I flush my whole coolant system

Preferable to flush as much out as possible to get rid of the old stuff and can be done at home by undoing the heater hose at the fire wall and using the garden hose to force water through until it comes out clean Dont turn hose on full blast as it will spray out over everything build up to it so it doesnt make a mess.Make sure the heater is in the on position so that water comes out the pipe you took the hose off.Either way though it will still be ok to just undo the bottom radiator hose as the majority of it will come out.

Posted on Nov 20, 2008

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Mustgo
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SOURCE: where is the engine coolant drain bolt on a 2003

The textbook method is to remove the drain plug on the bottom of the radiator.

Most drain plug is make of inexpensive nylon/plastic and it may fall apart while you turn it.

The professional method is to loosen the lower radiator clamp and drop to lower radiator hose.

Drain the coolant onto a large drain pan and recycle the coolant

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Posted on Dec 06, 2009

  • 214 Answers

SOURCE: 1997 honda civic over temp. Have replaced

Generally if one hose is hot, and the other hose is cold it indicates that they water is not circulating. You could have a defective thermostat. Take the thermostat out and run the engine without it. With the radiator cap off you should see a lot of water moving through. It that is the case, replace the thermostat and you should be ok. If there is no rapid movement of water it may be the impeller on the water pump came loose. This is rare, but it can happen since the impeller is usually pressed on the shaft. You should also check and see if you get a lot of bubbles when the car is running and the cap off. This often indicates a blown head gasket. Hope this helps.

Posted on Aug 10, 2010

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