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How to bleed cooling system - Vehicle Parts & Accessories

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When you say cooling are you talking about a radiator or AC system. the radiator has a hose on the back of the radiator facing the engine. unscew it usually counter clockwise while facing it. open the radiator cap to speed up the process. If your talking about the AC There is a high pressure and low pressure line coming from the AC compressor. The easiest one to reach is the low pressure. you want the high pressure end. its located on the pipe coming from the AC compressor, remove the cap by unscrewing it. now you`ll see what looks like a bicycle or car tire valve. You can push this with a screw drive. BE CAREFUL not to damage it or get the gas on yourselt. Ive done this while charging the system. feeding freon in and just for a few seconds open the high pressure to let out air till you feel cold freon coming out. Have the motor running and the AC on its highest setting while putting in freon. WARNING discarging freon into the atmosphere is illegan and destroys the ozone layer.

Posted on Apr 22, 2014

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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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Changed a radiator today, drained system. Hot water will not heat now. Heating and radiators are working ok


Helen, if it is the radiator in your car that was changed, you may have air in the cooling system that needs bled out. May also be a failing water pump, thermostat,etc.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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May 02, 2016 | Cars & Trucks

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I've eplaced the thermostat on my 2014 HD Ultra Limited. Apparently I was supposed to bleed the cooling system after I refilled it, but I can't find any how-to's on accomplishing that. Any tips?


Remove rad cap while cold start and run engine making sure to keep it full also check for air bleeds along the system usually near tstat or on top most cooling system component

Mar 16, 2016 | Cars & Trucks

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Why my 2000 s/70 volvo temperture hand goes to hot when driving i change the radator now this my problem


Rodney, first thing I can think of, the coolant system has an air lock in it. when changing a radiator now a days, the coolant system has to be bled properly for a successful install. Other than bleeding for air, you may have a faulty plugged core radiator. You did plug your fans back in right. links below on how to bleed air from cooling system.
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https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiOotyLlInLAhVCdR4KHdTpAe4QFggbMAA&url=http%3A%2F%2Fwww.instructables.com%2Fid%2FHow-to-Burp-your-cars-cooling-system%2F&usg=AFQjCNGscHjEvt6J8S0vwf6Ma5PDjplPCQ

bleed cooling system

Feb 21, 2016 | 2000 Volvo S70

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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

I have a 2005 ford Taurus.where is the cooling system bleeder valve located? Can you bleed the cooling system on this vehicle.?


On Ford you have to bleed the system of air in the cooling system there are several ways to do it, Here is the easy way withe the vehicle cool to touch open the top radiator hose add the coolant or water through there

Nov 08, 2012 | Cars & Trucks

1 Answer

My car is overheating and the heater is not working. I've been told it's a blown head gasket. I've also been told that I need to bleed my cooling system. So my question is, where is the co


If you have a blown head gasket, surely you will overheat because some hot combustion gases are entering your cooling system. No way you can remedy it by bleeding the system. Bleeding the system is just removing the trapped air in it. Running the engine with out the radiator cap will do the trick.

Oct 23, 2012 | 2005 Nissan Sentra

1 Answer

Bleeding the cooling system


look at your top radiator hose is there a small bleed valve at the top of the thermostat housing when the upper hose attaches to? If so loosen the bleed valve and allow the cooling system to purge the air out of the system you can tell when the air is out of the system when a steady stream of coolant starts to flow out of the bleed valve, if there is no bleed valve take the top radiator hose off of the engine side and allow the cooling system to purge the air out through the top of the engine that way

Jul 26, 2012 | 1996 Pontiac Grand Prix

1 Answer

Engine gets hoat some time, no heat from heater. top hose seems hot to touch lower hose is cool. Drained radiator few weeks ago and problem began


Theres a strong possibility being you just changed the coolant a few weeks ago that theres air in the cooling system not allowing the coolant to cirrculate properly, look at your top radiator hose is theres a small bleed valve at the top of the thermostat housing when the upper hose attactes to? If so loosen the bleed valve and allow the cooling system to purge the air out of the system you can tell when the air is out of the system when a steady stream of coolant starts to flow out of the bleed valve, if theres no bleed valve take the top radiator hose off of the engine side and allow the cooling system to purge the air out through the top of the engine that way, but it definatly sounds like theres air in the system not allowing for the cooling system to cool properly...

Dec 07, 2010 | 2003 Mitsubishi Galant

1 Answer

Need to bleed air our of cooling system on 1992 Lexus SC400


The generic method of bleeding air from the cooling system is to use a floor jack and raise the front of the car as high as poss, then fill the coolant recovery tank full and run the engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be pulled from the recovery tank, repeat as necessary, never let the recovery tank run dry or more air will be pulled into the cooling systeml

May 18, 2010 | 1991 Lexus LS 400

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