Question about 1998 Chevrolet Cavalier

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Engine coolant when i use ac in the car the coolant starts coming out from the cap

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  • shahzad5 Jul 05, 2008

    i dont understand

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Head gaskets

Posted on Jul 03, 2008

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How to correct problem cooling fan working only w/ac tl 3.2 1999 overheating?


Water pump? Did you jump fan cooling switch (on thermostat housing) to see if fans come on?

May 25, 2014 | Acura TL Cars & Trucks

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 water.to 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 hose.open 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

2 Answers

2002 Mini Cooper overheating when idling with the airconditioning on. Initially the air is cold and as the car engine temperature heats up the air conditioning gets warmer. Also, the radiator overflow cap...


Most cars have an 2 electric fans on the radiator. One will run when the coolant gets hot and the other will run when there is more cooling demand OR it will run when the AC is turned on. My guess is, the second fan is not running when your AC is. Your AC system creates heat of its own. The heat is removed through the condenser (radiator-like coil) which is usually located in front of your engine radiator. Without a fan the heat is transferred into your engine radiator causing it to over heat. This would explain why it overheats while idlling and not while driving. While driving, air is flowing through the radiator and condenser. to provide the necessary cooling. In short, check to see if both fans are running when the engine is hot and the AC is turned on.

Sep 02, 2011 | 2003 Mini Cooper

2 Answers

My temp gauge goes to the third line before fans come on and only the low fan comes on. I already replaced thermostat, engine coolant temp. sensor and radiator flush... any idea why high fans dont come on...


CHECK COOLANT FAN FUSES AND RELAYS. CHECK COOLANT LEVEL.MAKE SURE ITS NOT TOO LOW BECAUSE IF COOLANT TOO LOW . BY NO COOLANT AROUND OR COOLANT SENSOR NOT SUBMERGED IN COOLANT COOLING FANS WONT TURN ON.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER. CHECK FOR CLAPSE RADIATOR HOSES.CHECK RADIATOR HOSE AT WATER PUMP.IF HOSE LOOK CLAPSE REPLACE IT AND BLEED COOLANT SYSTEM.IF EVERY THING HAS BEEN DONE YOU NEED ENGINE BLOCK FLUSHED OUT.HEATER CORE ALSO COULD BE STOPPED UP.A VERY HIGH MILEAGE ENGINE WILL OVER HEAT.OLD ENGINE LOSES COMPRESSION AND HORSE POWER.PUTTING MORE LOAD ON THE OLD ENGINE WILL MAKE IT OVER HEAT.IF COOLANT LEVEL IS LOW.BLEED COOLANT SYSTEM.START THE ENGINE LET IT IDLE FEW MINUTES WATCH THE COOLANT TEMPERATURE GAUGE.WHEN TEMPERATURE START RISING.TURN OFF THE ENGINE LET IT SET FOR 20 MINUTES.TAKE A LARGE RAG PLACE OVER RADIATOR CAP ON COOLANT EXPANSION TANK SLOWLY OPEN RADIATOR CAP JUST A LITTLE TO RELEASE A LITTLE PRESSURE AT A TIME.DONT OPEN CAP RAPIDLY OR YOU WILL GET SCALDED.ONCE THE RADIATOR CAP REMOVED.IF COOLANT LOW ADD MORE COOLANT IN THE THE COOLANT EXPANSION UNTIL YOU GET TO THE COLD MARK.REPEAT THIS PROCEDURE START ENGINE LET IT RUN UNTIL TEMP GAUGE START CLIMBING A BIT DONT LET CAR RUN TO OVER HEAT JUST IDLE UNTIL TEMP JUST START TO RISE.THEN YOU TURN OFF ENGINE. WAIT 20 MINUTES.THEN USE LARGE RAG OPEN RADIATOR CAP LITTLE AT A TIME. DO THIS PROCEDURE UNTIL THE COOLANT IN THE EXPANSION TANK STOP DROPPING. THEN ALL THE AIR IS BLEED OUT THE COOLANT.WHEN COOLANT LEVEL STOP DROPPING, WHEN YOU DRIVE CAR AROUND.AND TURN OFF ENGINE.WHEN ENGINE OFF CAR SET FOR A WHILE KEEP CHECK ON THE COOLANT LEVEL IN COOLANT EXPANSION TANK. THE COOLANT LEVEL SHOULD BE AT THE COLD MARK IN THE EXPANSION TANK.MAKE SURE COOLANT IS IN THE EXPANSION TANK.IF NOT AIR WILL DRAW IN COOLANT SYSTEM. CAUSING ENGINE TO OVER HEAT.IF BLEEDING AIR OUT THE COOLANT SYSTEM DONT HELP AND COOLANT FANS DONT TURN ON YOU HAVE PCM PROBLEMS.

Apr 22, 2011 | 2004 Pontiac Grand Prix

1 Answer

I let my car heat up to get frost of window for about fifteen minutes. When I went out the frost was still on window and no heat coming from dash and car was overheating. I shut it off, let it cool down...


Start with engine cool, remove rad cap, start engine and turn heater on. Top up rad level and Let engine run until it get's up to normal operating temperature with cap off and add coolant as you see it go down. Watch in rad for coolant to start moving quicker, once gauge gets close to normal temperature, indicating that thermostat has opened. Wait until you see that 2 or 3 times, then top up and install rad cap. Top up coolant return bottle to proper level . You'll want to keep a close eye on coolant return bottle level for next little while. If coolant got that low in the first place, you have a leak somewhere that will have to be found.

Mar 31, 2011 | 2002 Chevrolet Impala

1 Answer

1990 nissan maxima has no heat after changing thermostat and water pump AC works


make sure system is well bled of air. Open radiator cap and start engine. Run until hot and thermostat is open (coolant flowing in radiator. Keep radiator full and also open any bleeder ports on thermostat housing or in hoses until no air comes out.

Sep 26, 2010 | 1990 Nissan Maxima

1 Answer

Heater was not working water was spewing out of coolant can.


The coolant tank cap should be replaced. The cap should keep coolant from coming out of the tank. The rubber or cork seal could have went bad on the cap. The cap isn't holding pressure like it should. Ex: your coolant cap holds 16psi new and the cap now can only hold 7psi from age or just defect, that water is going to the place it can be released, which is the cap. Try a new cap, which is $7-$10. You'll be surprised how many people go through changing parts$$$$$$$ and it ends up being the pressure cap for the coolant tank.

Jan 05, 2010 | 1993 Chevrolet Lumina

5 Answers

Overheating 1992 acra integra


The coolant temp sensor tells the computer tempurature of engine at all times.It tells the coolant fans to come on,and also very important,when to cut off.If the fans don`t go off by them selfs,then temp is not going down.Now this is if the ac is off,cooling fans come on any time ac is turned on,so check for fans coming on and off with ac off.A bad coolant sensor would cause the fans not ot come on,but not to cut off nessasaralyCoolant systems must be bled of air trapped in systemfor the engine to be cooled .If air is in the system,the coolant won`t flow correctly.

Aug 07, 2009 | 1992 Acura Integra Hatchback

1 Answer

My car is over heati ng and i dont know why, i checked the coolant and its fine i checked the hoses and their not leaking so what else could it possibly be


There are several reasons it could be over heating first check the coolant themostat while the engine is cool remove the cap start engine when the engine becomes warm see if there is circulation of the coolant if there is not you probbably have a stuck thermostat. I would also check the cooling fans when it gets hot does the fan come on, if it does not you would need to check the coolant fan relay. Another thing see if the fans or fan comes on when you turn the ac on.

Jul 10, 2009 | 1991 Honda Accord

3 Answers

Dodge stratus R/T 2002 antifreeze problem(antifreeze coming out the cap)


First the "service engine soon" light is a manufacturer installed reminder for you to get an oil change or other pre-determined maintenance service done. It is different than the "check engine" light which indicates a sensor malfunction. Secondly, when the engine is cold the thermostat is closed and the antifreeze or coolant is not circulating. The cooling system is a closed system and the tank that the cap is on is not an overflow tank but rather an expansion tank. This tank allows for the expanding coolant that is now hot to leave the engine coolant jackets, that won't expand, into a tank that can expand slightly. When your engine got to normal operating temp., aka.. hot, the thermostat opened allowing coolant to circulate and fill the expansion tank probably over flowing with the cap off. This is a normal operation for your car.

Oct 05, 2008 | 2002 Dodge Stratus

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