Question about 1998 Cadillac DeVille

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My water keeps running out I never see it then my coolant leve comes on then the motor over heats ???? I had changed the thermostat I THAUGHT it was bad.

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There may be a leak or the radiator cap may no longer prevent the steam from escaping. check the radiator fans if they are turning. You can check the fan if it is working by pulling out the temp sensor at the lower radiator hose near the engine. The fan should blow at full once you unplug it. Check also the water pump in the engine if there are leaks. You may have it replaced. Check for white smoke at the exhaust, if there is and it has sort of a sweet smell you may be loosing coolant to the cylinders because of a bad head gasket.

Posted on Jul 03, 2009

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Little heat coming out of vents.


IF YOU CAN'T FEEL THE AIR FLOW OUT BUT YOU HEAR THE BLOWER MOTOR WORKING, BEHIND THE GLOVE BOX IS A CABIN FILTER.REPLACE FILTER
IF YOU HAVE GOOD AIR FLOW BUT NO HEAT:
1;VACUUM LEAKING TO HEATER CONTROL
2;WATER PUMP GOING BAD / NOT CIRCULATING COOLANT,HIGH RPM/MORE COOLANT TO THE HEATER CORE
3;OPEN THERMOSTAT/ENGINE TEMPERATURE TO LOW
1;CHANGE THE DIRECTION FROM VENTS TO FLOUR TO WINDSHIELD. IF NOTHING HAPPEN IS THE VACUUM
2;RUN THE ENGINE INSIDE ON WARM PLACE ON IDLE.NOTE THE GAUGE IF PAS 1/2 TO 3/4. IF PAS 3/4 MARK REPLACE WATER PUMP
3;IF GAUGE STAY BELOW 1/2 REPLACE THERMOSTAT
GOOD LUCK

Mar 27, 2014 | 2005 Dodge Neon

1 Answer

The vehicle is 2004 buick century. sometimes the temp guage rises and comes back down. during this time, clod air blows. sometimes the temp guage is 1/2 way and cold air blows. thermostat has been changed....


is your electric fans running constantly. and most times then not you`ll need a water temp sensor or water temp relay. usually the temp sensor on that model comes usually next to the thermostat with a little wired plug on top. or on the radiator. either way pull the plug while the motor is cold. unscrew the sensor and screw the new one in and replace the electric plug back on top of the sensor. 2 things: Cold motor, have every thing set up and ready because when you take out the sensor the coolant will start to come out. you will not loose much if you work quick. keep rags or paper towels below the sensor to keep coolant off the motor and smelling when it gets hot. you have also pour or hose off coolant after your done installing the new coolant temp sensor.

Feb 10, 2014 | 2004 Buick Century

2 Answers

My 99 alero v6 is over heating not leaking ight mite be hoses or thermostat . or head gasket but when it overb heats the smoke comes from the top of the engine


REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.IF CAR OVER HEATING WHILE IN MOTION.MORE LIKELY ITS THE THERMOSTAT,LOW COOLANT IN RADIATOR OR COOLANT SYSTEM,BAD WATER PUMP,WATER PUMP WEEP HOLE IS LEAKING, WATER PUMP NEEDS REPLACING.CHECK ENGINE OIL,IF OIL LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF CAR IN PARK AND OVER HEATS WHILE IN A LONG TRAFFIC LINE OR.BANK DRIVE THROUGH COOLANT FAN NOT TURNING ON, BECAUSE THE ENGINE COOLANT TEMPERATURE SENSOR FAULTY.CODE SCAN CAR FOR FAULTY COOLANT FAN RELAY OR FAULTY PCM. CHECK COOLANT FAN FUSE, AND HOT WIRE THE COOLANT FAN TO MAKE SURE ITS WORKING.IF COOLANT FAN DONT WORK WHEN HOT WIRED. COOLANT FAN NEEDS REPLACING. REPLACE BOTH RADIATOR HOSES, REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.BUY NEW COOLANT ADD 50/50 WATER AND COOLANT.IF ENGINE OIL HAS ANTIFREEZE IN IT.REPLACE ENGINE OIL AND OIL FILTER TO KEEP FROM LOCKING UP THE ENGINE.GET CAR FIX.DONT KEEP DRIVING IF IT KEEP OVER HEATING,ENGINE DAMAGE WILL OCCUR.I HOPE INFORMATION I GAVE YOU WILL FIX PROBLEM.PROBLEM COULD BE LEAKING RADIATOR HOSES BUT CHANGE THERMOSTAT THATS FIRST THING I WOULD CHANGE BECAUSE IF IT CLOSED, ENGINE WILL OVER HEAT AND CRACK CYLINDER HEAD OR CRACK PISTON, COOLANT NEED TO CIRCULATE THROUGH THE ENGINE TO TAKE AWAY THE HEAT FROM ENGINE.

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2 Answers

Just changed out the waterpump. fluid in resevoir full, maybe to full, is this a problem. No heat coming out of dash?


NEED TO MAKE SURE YOUR COOLANT MIXTURE IS CORRECT AND BE SURE TO
CHANGE THE THERMOSTAT BECAUSE AFTER A MOTOR OVERHEATS THE WAX
DIAPHRAGM IN THE THERMOSTAT BECOMES DISTORTED

Jan 21, 2011 | 2002 Dodge Grand Caravan

1 Answer

I have a 1996 dodge intrepid that keeps over heating. I've changed the thermostat and now it over heats sometimes. The auto store told me I had to bleed the thermostat but didn't tell me how to do it. How...


If the thermostat is working, and there is no visible coolant leak or water/coolant in engine oil dipstick, then it could be the electric fan, try running your car and when it starts to overheat check to see if the fan is working. Good Luck.

Nov 01, 2010 | 1996 Dodge Intrepid

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

2001 sentra heat problem. I recently had the waterpump on my 01 sentra replaced. since then my heat doesnt work properly. When I'm on the highway it's fine but when im in stop and go traffic it barely...


There is a bleeder bolt next to the thermostat housing...I believe it is 10mm...Its on the block....Has a small sticker that says dont open when hot..Its very small, hard toe read....The bolt has 2 small copper washers on it to make the seal....I would try to bleed it from there...

Feb 11, 2010 | 2001 Nissan Sentra

3 Answers

My cars interior is not being heated.


If the motor over heats it may be the water pump. A motor will not run very far with a bad water pump or stuck thermostat. Most of the time a water pump won't quit pumping water they leak. If the motor won't get hot enough it is the thermostat.

Jan 06, 2010 | 2002 Dodge Intrepid

1 Answer

Engine over heats 2000 cadallic deville northstar engine


flush your radiator first.with the thermostat out you should see the water moving if not bad water pump.this engine needs the thermostat to function properly and either a 50/50 coolant or straight coolant so it does not boil over.also make sure your fans are coming on

Sep 20, 2009 | 2000 Cadillac DeVille

2 Answers

I have a 1994 Plymouth Grand Voyager. I replaced the thermostat 2 weeks ago, and now the heater valve but I don't know how to bleed the antifreeze so the air can come out. How do you do this on this van?...


Hi there... with the radiator cap off, start the van and let it warm up. Once the thermostat opens you will see the coolant start to circulate in the rad. let it run for 10 - 15 minutes and add more coolant as needed. you will know when there is no more air because the coolant leve, won't go down anymore. Top up the rad and put the cap back on. make sure the overflow resevoir has coolant in it to the full mark and youre done. Hope this helps you out

Jan 06, 2009 | 1999 Dodge Neon

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