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How do you bleed 2001 cooling system after freez plug replacement.

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IF THIS IS 4.7 THERE IS A 8MM HEX PLUG ON LEFT SIDE OF TIMING COVER REMOVE, REFILL SYSTEM UNTIL FLUID COMES OUT OF THIS PLUG HOLE AND MUST OF AIR IS OUT REINSTALL AND START ENGINE FOR FEW MINUTES WITH RAD. CAP OFF WHEN FLUID START RAISING REINSTALL CAP

Posted on Nov 18, 2009

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Will an air pocket in the coolant system cause it to overheat or over pressurize on a 2001 Nissan Sentra ?


1. The radiator cap if working correctly it will release pressure in the system provided the cap you have is the correct pressure setting. If you are having a problem with pressure then replace the cap with a new radiator cap with the correct pressure setting. Do not use a cap with a pressure setting other than the original equipment pressure spec. So you do not go to the parts store and buy any radiator cap on the shelf that fits because they come with different pressure ratings and some of these will be totally unsuitable for your car.

2. If the pressure valve is stuck in the "old" cap the pressure release system will not work.

3. Overheating
Air pockets in the cooling system can definitely cause overheating and can retard coolant flow through the system. If you are draining the radiator to replace the coolant or replacing the radiator you need to follow the correct procedures for bleeding air out of the system for that particular engine after coolant refilling. Some engines have bleeder screws on the cooling system to assist in the air bleeding procedure and some don't.

There are various causes for overheating so don't assume it will necessarily be solved by bleeding any remaining air from the cooling system and replacing the radiator cap with one that works.

Other causes can be...........
1. Faulty cooling system thermostat. (Replace the Thermostat)
2. Faulty water pump, especially if the impellers have corroded away or have disintegrated in the case of those design genius water pumps with plastic impellers. (Replace the water pump)

3. Cooling fans not working and if so the cause needs to be tracked. Check that your fans are kicking in. If the engine is overheating the fans should be running because they will switch on when the coolant reaches a specific temp and well before the coolant gets excessively hot.

4. A partial blockage in the coolant passages inside the engine but not in the radiator if you have a new one. If the coolant is not changed at the required intervals(frequently the case with many owners) or is over diluted with water you can get a build up of debris. If products like stop leak have been used in the system this can create similar problems with partial blockages inside the engine coolant passages.

5. A compression leak into the cooling system.
If you have bled air from the system and have continuous air bubbles in the cooling system I would suspect a compression leak. In that event a basic leak down test will show if you have compression gasses leaking into the cooling system and from which cylinder(s). The spark plug is removed and compressed air is forced into the cylinder via the spark plug fitting and air bubbles will show up in the coolant of there is a leak into the cooling system.
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Have the problem with overheating addressed immediately. Running the engine with an overheat condition will cause expensive engine damage many times the cost of fixing the overheating issue.

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Dec 29, 2015 | Nissan Cars & Trucks

1 Answer

Keeps over heating and done head gasket and changed thermostat and got pressure build up how do I stop it over heating


Replace the Radiator and WaterPump, You are NOT getting Circulation. ok sorry the Procedures were not followed On repairing You Cooling system, Go to this Link and watch Video on Bleeding the System of Air.https://video.search.yahoo.com/yhs/search;_ylt=A0LEVrwA0SNWrIYANqMnnIlQ;_ylu=X3oDMTByMjB0aG5zBGNvbG8DYmYxBHBvcwMxBHZ0aWQDBHNlYwNzYw--?p=Bleeding+a+Cooling+System+On+a+Daewoo+Cars&fr=yhs-mozilla-001&hspart=mozilla&hsimp=yhs-001

Oct 18, 2015 | 2001 Daewoo Tacuma 2.0

1 Answer

Why do the freeze plug keeps popping out and keeps over heating change t stat and water pump


If your in sub bellow zero weather you need to install engine anti freeze not water this is the cause of freeze plugs popping water in your cooling system if you install anti freeze this should stop these from popping out on =you.

Jan 09, 2011 | 2001 Volkswagen Beetle

2 Answers

How do i bleed air from the cooling system on a 2001 cadillac sts with the norstar engine


how do i bleed my ciiling system on a 2002 deville with northstar

Nov 21, 2010 | 2001 Cadillac Sts

1 Answer

Overheating, but not consistant, May drive 2 miles or 25miles before overheating. Replaced theromstat, flushed, replaced radiator, replaced water pump, pulled headsand replaced head gaskets, cheched and...


1st make sure your cooling fans turn on. If they do, you probably have air in your cooling system. If you don't know where the bleed valve is or how to bleed the cooling system, check out this link. COOLANT BLEED VALVE

Sep 19, 2010 | 2001 Chrysler 300M

1 Answer

2001 Aurora water pump replaced but now every time car is started Low engine coolant warning comes on but goes out when reset and doesn't come back on until car is started. Checked and coolant level is...


On the Owner's Manual there's a procedure you have to follow to bleed the air in the cooling system, until you bleed the system for air, the low coolant light will come on every time.

The process is rather simple and quick, all you need is a flat head screw driver.

DO NOT OPEN THE COOLING SYSTEM WHEN HOT.

Good Luck!! Don't forget to rate this post!!

Sep 03, 2010 | 2001 Oldsmobile Aurora

1 Answer

2001 Chevy Impala


If you have done this already,then bleed the cooling system,this is all you lack,just get the air out of the system,two bleed ports,one on the thermostat housing,and one on the engine near the water pump,just bleed them out as the car warms up,the thermostat bleeder last,if this was at all helpful,please rate,thank you.

Jul 04, 2010 | 2001 Chevrolet Impala

1 Answer

Duramngo cooling system problems (2001, 4.7 L)


mcdevito75 here, Part of the reson could be manufactures are useing alumimum a lighter metal in many parts of their cars, and alumium does not hold up to heat very well. In my opinion your cooling system is just too hot, Part of some auto radiators are made from plastic, also not good for the heat build up in your cooling system. First I would get a very good brand of anti freeze a brand that says on the container it protects aluminum, and mix a specs. Then I would replace the vehicles thermostat from the 195 dergree the factory recommends down to a 180 degree, this will not hurt the vehicle or computer, lastly I would change the radiator cap the one inuse now could be building too much pressure in your cooling system. About your warrantee any Durango Dealership should honor it, unless it"s worn out. (over)

May 29, 2009 | 2001 Dodge Durango

1 Answer

HI my 51plate golf seems like it has an airlock in the cooling system heaters blow cold replaced thermostat has new radiator and i seem to be getting alot of pressure building up in the bottom hose and the...


dont get many faults with heater matrix in 51 plate golfs,but its a very common fault you have........the water pump impellor breaks up and dont move the water round the system,and the system is self bleeding..

Jan 18, 2009 | 2001 Volkswagen Golf

2 Answers

Antifreeze


Do this only if the engine is cold.Set the heater on.Remove the coolant expansion tank cap , place a suitable container under the radiator area , Look under the radiator (bottom rear side) for a plastic screw and loosen this by hand . Move swiftly not to get wet.Remove the bleeding screw on the top radiator hose.Flush the system with a coolant flush solution if the coolant is really dirty.Refit the drain plug , refill anti freeze (check with your parts supplier for the recommended ratio for your area(or your dealer)and top up with water.Run the engine and close the bleed screw once water comes out and replace the cap.Warm the vehicle up and remove the cap when it has cooled down again.Check coolant level and top up.Reset the heater off(if its summer there.)

Oct 02, 2008 | 1999 Land Rover Discovery

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