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I have a 03 nissan sentra and the heat doesnt work. My mechanic told me it was the radiator and hose so i changed them. It still doesnt work. It only works on the highway. The other day the car was overheating and when i pulled over my coolant was bubbling and there was smoke coming out of it.

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  • Cars & Trucks Master
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Sounds more like a water pump circulation problem now you have eliminated the radiator? Also have the radiator cap pressure tested. The cap could be the simple fix. Hope this helps.

Posted on Jan 15, 2013

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Try your thermostat that's usually the problem or a blocked hose

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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SOURCE: overheating 1989 nissan maxima also radator fan won't come on

Hi,must of the time when fans stop working is because a fuse or a fan relay is burned ,it is also posible that the fan motor also burn out,there is a temperature switch at the cilinder head that can go bad and the fan will not go on. this should do it .....

Posted on Sep 01, 2008

alicantecoli
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SOURCE: coolant problems 2000 vw jetta

plastic impeller on water pump has come adrift

Posted on Dec 22, 2008

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SOURCE: 2003 Nissan Sentra Problem overheating and heater doesn't work.

I had this exact problem a few weeks ago. The repair shop first changed the thermostat. Didn't fix the problem. Next step, they found the radiator was clogged. They replaced the radiator and now everything works fine.

Posted on Mar 23, 2009

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SOURCE: I have a 1996 Acura 3.2TL[V6] and it is overheating...

I had the same problem, whole new radiator, new hoses, new thermostat, and still overheating. What the problem was for me...bad radiator cap...all that money and a $20 fix...try it?

Posted on Oct 01, 2009

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SOURCE: 1993 Toyota Camry V6: Engine Overheating Prob

Yes if it hydraulically operated it could be because the pump for the fan is bad. If I am not mistaken the fan is run off of the power steering pump correct. check and make sure the pump is working correctly. I have not seen a hydraulic motor on a car I know they put them on a lot of diesel trucks like humvees and some Chevy diesels but not on a car. Most are usually electrical. I know on humvees with a hydraulic fan they have a fan controller check this and make sure it is working right you can unplug the controller and the fan should stay ingaged and turn faster.

Posted on Oct 05, 2009

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2 Answers

Engine overheat and no heat


Maybe your radiator is clogged.

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Radiator blows fluid when try to start then car over heats On my 03 Nissan sentra


Check for bad thermostadt, or leaky hoses or radiator, do it soon, before engine damage occurs.
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2008 nissan sentra heat gauge fluctuates up and down in the first 20 minutes of driving . then it will work fine . had thermostat changed 3 or 4 times flushed cooling system new heat sending unit car...


COULD BE BOTTOM HOSE SUCKING SHUT UNTIL THERMOSAT OPENS . WHEN IT COLD CRANK UP W/HOOD OPEN GIVE IT GAS MANUAL AN LOOK TO SEE IF HOSE IS SUCKING SHUT MOST BOTTOM HOSE HAS SPRING IN THEM BUT OVER TIME THEY RUST AN COLLASPE AN IT CAN BE TOP HOSE TO SUCKING SHUT JUST CHECK BOTH HOSES.

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Thermostat


It should be located where the lower radiator hose connects to the engine, and there you should find the thermostat housing. Be sure when installing the new thermostat that the spring side of the thermostat is installed towards the engine.

After you change the thermostat you might have to remove the upper radiator hose from the radiator to pour coolant back into the block, or the engine might not have any coolant getting into it until after the thermostat has opened up, and by then it would be too late and the engine will over-heat. Also, be sure to bleed the trapped air from the cooling system by using any bleeders in the cooling system.


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Jun 20, 2010 | 2000 Nissan Sentra

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03 Nissan Sentra heats up when at a stop, cools back down when drove, ideas? I just picked it up from a tuneup when problem started, coincidence?


Maybe but Check to see if the radiator is full and the overflow tank for the radiator is full. If it's OK take the car to auto zone or Orilys (Schucks) and have them pressure test the cap, if the cap passes the pressure test then make sure there is nothing blocking the radiator and if it has an electric fan be sure it is plugged in. In the tune up procedures some cars require the fan to be disconnected.

May 28, 2010 | 2003 Nissan Sentra

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I have an 03 Nissan Sentra and the heat cuts in and out. When I slow the car down, the temp. gage shoots up


good day Sir, try to check the radiator maybe thats the cause of the over heating. i hope this tip will help you.

Jan 07, 2010 | 2003 Nissan Sentra

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Heating problem


Check theromstat, also test coolant probe be sure it is sending good signal. Also you may need to oversize the waterpump pulley. Be sure the pump is moving the coolant .

May 23, 2009 | 1996 Nissan Sentra

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2003 Nissan Sentra Problem overheating and heater doesn't work.


does the car overheat at idle or travelling down the road? if the thermostat was not changed, thats first step. checking it is replacing it. possibly air-bound. then i would suspect a headgasket problem.

Sep 30, 2008 | 2003 Nissan Sentra

1 Answer

Hi, I have a 2001 nissan sentra gxe that is overheating. I have changed the thermostat, water pump and flushed the radiator. The radiator does not have a leak in it, but the car is still over heating. ...


hi. was just looking at your problem of (sentra) overheating and actually, i am a mechanic for nissan and have changed many head gaskets for this particular vehicle equipped with 1.8 liter motor and found that they are notorious for this problem of faulty head gasket's.Unless you did't properly bleed the system,which i doubt because you seem mechanically inclined since you already changed every other part of the system,i would't doubt that this is the problem.Anyway, by the time you read this, you have probably already found this out..Just thought i would let you know this info.Good luck!...by the way,if you haven't already changed you cam and crank sensors,do that too,before you get stuck and get the part's at the dealer!!!!-they are redesigned from the old one's!!just some advise to try to help you out!!! John from N.Y.

Jul 26, 2008 | 2007 Nissan Sentra 2.0 SL Sedan

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