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How to bleed cooling system

The cooling system is under pressure and running very hot. is there a bleed valve in the cooling system,and what steps do u take to bleed it

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Steps on bleeding cooling system

  1. Antifreeze is deadly to animals do not spill.
  2. remove radiator cap cold engine.
  3. at bottom of rad open valve with piece of hose stuck on valve end
  4. drain into container
  5. Start eng run 20 sec. to pump anti freeze out of engine let drain
  6. fill rad with hose install cap
  7. start run 1 min
  8. repeat 2 thru 5
  9. close valve
  10. fill with new antifreeze install cap
  11. run check for leaks
  12. stop add more anti
  13. run till warmed up
  14. let cool check level add
  15. done
hope this helps mike

Feb 22, 2016 | 2000 Lincoln LS

2 Answers

I just replaced my radiator and thermostat how do i bleed the air out of the system?

fill with coolant run until hot/normal temp. shut car off. let cool completely check level add to line cold level. Start run until at operating temp. check coolant hot level. Do not add coolant to hot tank scalding can occur!!, wait until engine is cool top off as needed. Check for leaks

Sep 02, 2014 | 2001 Kia Sportage

1 Answer

Y dose the john dear 6330 run hot all the time even after it blowen out

Engine or hydraulic system overheating clearpix.gif clearpix.gif clearpix.gif clearpix.gif clearpix.gif clearpix.gif Coolant system low on coolant in 6020, 6030, 6030 Premium, 7020, 7030 and
7030 Premium Series Tractors.

After several hours of work, warning system indicates hot engine coolant or hot hydraulic oil.
Situation or Problem
Coolant level in reservoir is between the "MIN" and "MAX" range but engine or hydraulic system is overheating.
Air is entering cooling system, hindering coolant flow. Check coolant level. Fill to the "MAX" line on the coolant reservoir.
Bleeding Cooling System:
The bleed valve (see Operator's Manual for location) on the radiator must be closed when the tractor is operating. Open the valve when coolant is drained or filled. If the bleed valve is left open, coolant will internally bypass between the low temperature circuit and engine high temperature circuit causing overheating. When bleeding the system, open the bleed valve and run the engine with no load for 5 minutes at 1700 rpm. Then shut engine off for 5 to 10 minutes before closing the drain valve. Check the coolant level. If level is below the "MAX" fill line, repeat this procedure until coolant level stays at the "MAX" line.

May 21, 2014 | Cars & Trucks

1 Answer

Does my car have a bleeder screw for the cooling system?

Those valves sound like fuel pressure test ports. Press down the center of valve and see if gas comes out. If it does, those valves are on the fuel rail, not in the coolant system.
A bleed valve is a bit different. Looks kind of like a grease zerk, with a small hole on its little round head. You put a small wrench on the valve and turn it as if loosening it, but only a turn or two to open it and let coolant or air out the hole on the valve. Look for it on or just close to the thermostat housing.
If you have no bleed valve, best practice is to fill radiator and overflow tank, then start car with the radiator cap off, and let engine run until the thermostat opens (upper radiator hose will get hot when thermostat opens). Now turn off engine and replace radiator cap. This usually gets all the air from coolant system, but sometimes you have to do it again.

Dec 12, 2012 | 2001 Subaru Legacy Outback

1 Answer

2003 Range Rover runs hot I replaced the thermostat but it has pressure in the line that pushes water out and causes it to run hot

You have trapped air in the cooling circuit. Or your water pump may not be operational. Or you have blockage somewhere else in the cooling circuit. By the way...... Did you check and or replace the cooling system cap. You should test that cap once a year.
Some of these cooling systems can be tricky. They place BLEEDER VALVES at the high points in the cooling system. Allowing you to remove all the trapped air out of the closed loop cooling system. The cooling system has to have a certain amount of pressure for purposes of flow. That pressure should be less than the value stated on the cooling cap. Look for bleeder valves, - you will have to fill the vehicle with them open. And then Fill and bleed as the engine is running. When the engine is running you will crack the bleeder open until fluid comes out close it and repeat several times until all the air is removed from the system.
The fact that the system is building up pressure is not an indication that the pump is working. ( think steam engine) when the fluid approaches boiling temp the pressure increases. Please do not use just water to fill your system.
(A) It lowers the boiling temperature of the fluid and
(B) Promotes corrosion (oxidation) in the block and cooling circuit.
I hope this helps you......

Oct 23, 2012 | 2003 Land Rover Range Rover

3 Answers

Engine overheating i have replaced the radiator has plenty of water

replace thermostat.then bleed coolant system, this is how you do it.fill the cooling coolant system with 50 / 50 dexcool and water to raise boiling point,straight water will evaporate boil away cause engine to overheat catch fire thats why you need 50 / 50 mixture antifreeze and bleed coolant system first fill coolant system until coolant stay at the full cold mark on the the coolant overflow jug,then you start engine allow it to idle,place the heater and ac control in any ac setting except max and the temperature control to the highest setting,run engine until lower hose to water pump is hot. with the engine hot run the engine speed up to 3000 rpm and allow it return to idle, repeat this 5 times. slowly open the bleed valve on the thermostat housing or look for bleed valve at the water pump heater bleed valve for 15 seconds to expel any trapped air.then top off the coolant as necessary,and when top radiator hose hot thermostat open up.keep adding cooling to overflow until coolant level stop at full cold mark dont over fill coolant.if engine seem like overheating while looking at cooling gauge turn off engine wait a while until cool off add more coolant until coolant level stay stable and dont drop any.when open radiator overflow cap use large rag over the radiator cap to keep from getting scald open radiator cap a little at a time but dont open radiator cap until engine cool down first.replace the radiator overflow cap, thermostat,and engine coolant temperature sensor and check the cooling fans fuses and relays see what happens.

Aug 18, 2012 | 1998 Oldsmobile Intrigue

1 Answer

How do i bleed my radiator on my bmw z3 1998

you can't bleed just the radiator, you have to bleed the cooling system through the bleed holes while it's hot and pressurized and running.

two areas: bleed valve on thermostat housing, or overfill cup next to radiator.

Jun 28, 2010 | 1998 BMW Z3 Roadster

1 Answer

1993 Geo : How do I bleed air from the cooling system? Is there a bleed valve? Where is it located?

No bleed valve. If you want to get the air out of the system, just run the car until it's hot and the thermostat opens, and then run it some more so that the coolant is fully distributed. The air will get to the top of the engine - the filler cap. Then after it's cool you can refill the engine, and the overfill tank.

Jan 11, 2010 | 1993 Geo Prizm

3 Answers

My heater does not and there is no wet spot on the floor board. I just changed the thermastat. Do you have an idea if what it could be?

sometimes these are a real pain to bleed. double check your cooling resevoir and top off as neccessary. once you have done that, rev the engine to about 2000rpm's while the heater is on. this will help bleed the system also and you should feel heat rather quickly. the running temp on these engines is around 220 degrees farenheit. happy holidays

Dec 30, 2009 | 2005 Chevrolet Impala

1 Answer

Air pressure in the engine

Sounds like air in system, does the temp guage fluxuwate or run higher than normal? or heater thros little or no heat? Do the cooling fans come one like they always have? thies are all signs of air in cooling system, and needs to be bleed out.

Apr 22, 2009 | 1993 Chevrolet Camaro

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