Question about 2001 Jeep Grand Cherokee

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AIR LOCK How do I get the air lock out?..flush the radiator?

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Run with rad cap off & heater on for about 2 or 3 times that rad fan comes on when it gets to operating temperature for cooling. Give it a little extra rev on gas pedal once in a while too, just a bit for a few seconds, to increase flow in cooling system for quicker disperse of air.

Posted on Dec 27, 2008

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Hi there I'm looking for some advice I have a Nissan pulsar 2000 no heat from the heater and car keeps overheating while driving I be flushed the radiator and heater core, replaced the thermostat


Crazy but have you put thermostat back in correct way? If so sounds like an air blockage. Fill radiator, leave cap off, put internal heater on hot and run engine until water is fully hot. Both top and bottom radiator hoses are hot. Sometimes therenis a bleed screw near the engine compartment bulkhead that needs opening to let trapped air out. If you have drained and refilled system and it only happened after that guarantee air lock. Good lick, let me know how you went plead.

Jun 26, 2016 | Nissan Cars & Trucks

1 Answer

Have a Vitara 1992 G16a Motor flushed water from radiator and have added coolant as required temp goes up above 3/4 and when turn the motor off the coolant from radiator rushes back into the overflow and...


it appears that there is an air lock in the cooling system. try loosening of a hose at a highest point and letting air out . refill the radiator and run without the cap to see if the level drops or if you continually get air bubbles

Feb 27, 2015 | Suzuki Vitara Cars & Trucks

1 Answer

How to remove air lock in '97 somona 2.2 coolant system?


Oh yeah, there's help my friend. Take the lower radiator hose from the radiator only, hook a garden hose up to the lower hose and seal it with hose clamps on adaptors. The garden hose is 3/4 inch and measure the radiator hose for the right size adaptor. Turn the water on and just leave it to back flush for a while. After you're done there, disconnect both hoses to the heater core and back flush it also. Get it all out. Flush heater core the other way after back flushing it, that way you knock it all loose and out. And you are understood friend.

Oct 11, 2014 | Cars & Trucks

4 Answers

Over heating, replaced thermostat, still over heats, i have a 2004 dodge stratus, 2.4L DHOC


After changing the thermostat, did you fill it with 50/50 antifreeze to water?

Is the radiator cap (not actually on the radiator) in good shape and seating properly?

If the answer is yes to all of the this, than I would try picking up some heavy duty flush from the local parts store and flush the system really well.

Hope this helps.

Feb 05, 2011 | 2004 Dodge Stratus

2 Answers

My a4 overheats really fast. While the radiator is cool


The problem may be air locked in the engine causing the thermostat not to open. You may need to bleed the water line some were near the termostat or if it doesn't have one you can run the car without the radiator cap on it for about 3 mins but make sure you are not running hot.then put the cap back on with the heater on blast when the air starts getting hot the termostat has open. If air dosen't get hot then try to do steps again ontil air is hot and temp is about normal. Hope this info helps

Mar 06, 2010 | 1999 Audi A4

2 Answers

I flushed radiator and replaced thermostat in 1991 nissan pathfinder, now I have no heat.


IF ENGINE RUNS AT RIGHT TEMP SOUNDS LIKE YOU MAY HAVE AIR BLOCK, OR BLOCKED HEATER MATRIX, CHECK FIRST CHECK THE HEIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN COULD BE AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS (TWO PIPES GOING FROM ENGINE BAY TO INSIDE OF CAR, AND FLUSH OUT WITH HOSE TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP, YOU CAN BY A COOLENT FLUSH SOLUTION TO CLEAN THE SYSTYM OUT

Dec 25, 2009 | 1991 Nissan Pathfinder

1 Answer

I have an air lock in my 1998 ford taurus se radiator .it seems like after a couple of minutes having warm air it begins to get cool again


Sounds more like a clogged heater core than an "air lock".

Flush the cooling system - twice!! with a decent cooling system cleaner - and be sure that the heater is on full heat when doing it.

I bet that you see a great improvement in performance!!

Nov 23, 2009 | 1998 Ford Taurus

1 Answer

My car 2005 Nissan Altima has been overheating when its 95-100+ degrees outside and when the needle hit the end of the icon on the dashboard the air condition starts to just blow normal air. After the car...


first useing a scanner or temp gun check the actual engine temp. if it is hot check for fan opperation, air lock in the cooling system water pump operation I think youll find the prblem to be the fan

Aug 18, 2009 | Nissan Altima Cars & Trucks

2 Answers

Dakota 4.7 liter engine heating


run the engine when warm, open bleeder screw slightly. air should come out, wait for steady stream of coolant. Then lock down bleeder screw.

Jul 26, 2009 | 2000 Dodge Dakota Quad Cab

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