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Bleeding of water system - Cars & Trucks

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Year, make., model, engine size?

For most vehicles it is pretty simple. Remove the radiator cap on a cold engine. Top off coolant in the radiator as necessary. Start the engine and allow to idle until the engine is up to full operating temperature and the fans come on. Keep on eye on the coolant during this time and continue to add as necessary. As soon as the fan comes on install the cap and you should be good to go.

Some specific models have specific instruction.

Posted on Feb 08, 2012


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Bleeding the coolant system 2005 chevy uplander

Bleeding the coolant system Leisa, Check the attached links,instruction and guides on bleeding cooling systems. Good luck
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I'm bleeding my radiators in my house and air is coming out of them no water some are hot 2 aren't I've had them open for ten minutes how long do I keep them open.or do I close them and bleed them again...

First, bleed only one radiator at a time. Remember the system is a closed loop so you will eventually get all the air out and hit water. If this is the first time the furnace has been used this year you could have quite a lot of air built up and it can take a long time to fully bleed the system. If you open two radiators and one is much colder than the other you can actually suck air into the circuit so open only one at a time. The air can also move around as you bleed the system so you may need to bleed it more than once.

Nov 21, 2014 | Cars & Trucks

1 Answer

02 ford explorer 4.0 overheating and suddenly blowing cold air, then hot again while engine runs cool but not long

Most likely you have air trapped in your engine, particularly in the heater loop. You need to properly bleed the air out of your radiator cooling system. The hot and cold blasts of air coming from first hot water followed by air.
Read up on how to bleed air out of your radiator system. Some systems are very difficult to bleed.
If after doing a good bleed of the radiator system the problem returns, you may have a bad head gasket or other leak in your cooling system which is injecting air into the cooling system (radiator/water cooling system).

Aug 12, 2014 | 2002 Ford Explorer

1 Answer

2003 pontiac grand am bleeding the cooling system

Look on your exhaust manifold. What you are looking for is a little bleed screw. Mine is painted blue. Yours maybe a different color. When you find it start your engine and let it idle for 3-5 minutes. Make sure your heat is turned on full. With the enging running turn bleed screw counterclockwise till water starts shooting out. Let the water continue to shoot out until you get a steady stream. Once you get that steady stream then tighten. Your system is now bled.

Dec 30, 2013 | 2003 Pontiac Grand Am

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Bleed air water system


Aug 20, 2013 | Nissan Armada Cars & Trucks

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2001 3 litre s type. water pump replaced now coolant leaks from overflow once engine is switched off

By removing the water pump obviously alot of water has drained out therefore you need to prime the air out of the complete water system at the radiator. The coolant leaking out is caused by the hot air rising to escape out the coolant bottle the only exit point.With the engine switched off, alocate a bleed screw on the top or on the side of the radiator and open that screw.Then keep pouring water into the coolant bottle until you see air escaping from the bleed screw.Once the air stops releasing and only water then spurts out, close the bleed screw. The system is now 95% primed. Start the engine and let her idle then open the bleed screw again, if only water spurts out for about 5 seconds then the system is completely primed. If there is still air coming out you can rev the engine a bit to circulate the water faster and then the system will bleed quicker(Not forgetting of course to top up the bottle replacing the lost water from bleeding) as soon as there is only water shooting out the bleeder, close the bleeder and top up the bottle to the maximum mark only. If ever you over top beyond the maximum mark just open the bleed screw to let out some water until it drops to the maximum mark and then close.The system is now fully bled. Problem solved.

Apr 15, 2013 | 2001 Jaguar S-Type

1 Answer

Where is the bleed valve located on a 1998 pontiac grand prix 2.8 engine? The auto parts store has never heard of a bleed valve.

Was the thermostat changed? I would suggest replacing the thermostat refill the system with new coolant and purge the air out of the system.

Mar 09, 2012 | Cars & Trucks

3 Answers

Coolant light keeps coming on

It could be low on coolant,or air in the cooling system,or the coolant low sensor needs cleaning.

Jul 15, 2010 | 1999 Mercedes-Benz SLK

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Hi We had the hose detach from BMW 5 series 1998 car and after putting it back, the car only runs a few hundred yards before registering as overheating again.We did top up the water with de-ionised water.

did the hose blow off and you put it back on? is the engine still losing water?
it no water loss remove water pump and check impeller for damage

May 23, 2010 | 2001 BMW 5 Series

1 Answer

2006 Equinox over-heating

There is a few things that could course your car to be over heating

  • Air In Cooling System
  • Coolant Leak
  • Water Pump Failure
  • Head Gasket Failure
These are some of the common problems as your car is reasonable new i would't think the head gasket has gone it is more then likely what you say that the water pump is broke probably the impaler has broken off. To bleed the system you need to get it up to running temperature and remove the bleed screws in the cooling system starting from the highest one working down then back up. If you find it is hard to bleed and no coolant is being pushed out it is more then likely that the water pump has gone. To test if the head gasket has gone take off the oil cap and look for a mayo type gunk around it if there is then this means that water is getting into the oil system meaning the head gasket has gone another test is to use a spacial liquid that test for exhaust gases in the coolant system.


Jan 16, 2010 | 2005 Chevrolet Equinox

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