Question about 1997 Jeep Grand Cherokee

2 Answers

Temperature gage has fluctuates between 100 and 260, the water is full and fan seems to be working ok, and all belts seems to be ok.

Posted by on

  • mlsout Aug 31, 2008

    Just replaced radiator, hoses, thermostat, but the gage fluctuates when in stop and go traffic or just idling...however when I am driving at a consistent speed it drops and stays normal. What do i do? What do I need to ask the mechanic to check? I'm not very savvy when it comes to car repairs...I'm already afraid I've been ripped off. 

  • gmc headache Nov 20, 2008

    I have the same problem. when mine gets hot I no longer have hot air in the heater, when the temp gauge drops back down I have hot air in the heater. I replaced the thermostat, but it has not changed the fluxuations. I know it is a water flow problem, what else should I check besides the TS?

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

The fluxuation in temp is from air bubbles in the coolant. As the air bubbles go through the system, it heats up (because if there is air then there is no coolant.) The way to fix this problem is by "burping" the coolant system. Basically, you want take off the radiator cap WHEN THE ENGINE IS COLD. Don't do it if the engine is even slightly hot, and NEVER do it if the radiator cap is hot. With the radiator cap off, start the car. As the car runs and heats up, the coolant will begin to flow through the system. This will make the air bubble also flow through the system. Once the bubble (or sometimes bubbles) reach the open radiator they will "pop." Don't burp it for too long though, eventually the coolant will overflow from the radiator. Once you see the bubbles coming to the surface, only do it for about 2-3 minutes. Once you've done that, put the cap back on and it should be back to regular operation. You might want to check the coolant level, if you need more, put it in the resevior. When you pour the coolant into the resevior, turn the container on it's side so it doesn't make that "chugging" effect, this could cause more air bubbles.

Posted on Nov 22, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Jeep Master
  • 61,249 Answers

You need to verify that the gage is accurate, if it is then the cause is the thermostat, but check the gage first, a repair shop can do this or you can feel the air coming off the radiator fan, if it is really hot changing to cool rapidly then the T-Stat is sticking open.

Posted on Aug 01, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

Why does temperature gauge only reach a little past half?


Larry, If the cooling system was not bled properly, the temperature could fluctuate up to 3/4 then normally back down to 1/8 on temp gage.
If your gage is just staying a little over half when running, that is actually normal and acceptable.

Mar 23, 2016 | 2000 Buick Century

1 Answer

Heater runs hot then goes cold


Do you have a temperature gage in your instrument cluster? When the temp goes cold, does the temp gage rise? Check your coolant level both in the radiator and the coolant recovery tank under the hood, and fill as necessary. If that is OK, then check your serpentine belt for wear and/or slippage around the water pump. Lastly, if you have a temp gage and are noticing fluctuations in the reading, you may need to replace your cooling system thermostat. Good luck.

Oct 04, 2013 | 2002 Chevrolet Silverado 1500

1 Answer

Where is located the temperature gage sensor for a Mazda MPV 2001


One should be on the radiator, one on the engine, check it on the radiator, this is controlling the fan

Mar 30, 2013 | 2001 Mazda MPV

1 Answer

I have a 300zx non turbo , it is not leaking coolant , electric fan is working good but whene i drive on a hyway , the temperature start going up like 3/4 on the gage, as soon i star driving in the city...


I doubt very seriously the temp problem has anything to do with the timing issue. It sounds more like the water pump is going bad or you have low coolant. When your moving the fan should be free wheeling if it isn't the clutch is bad or the Fan motor is bad. I would look at the Fluid level and water pump for being the issue here.

Feb 21, 2010 | Nissan 300ZX Cars & Trucks

2 Answers

In my chevy impala i have no hot air comming out of the vents. The temperture gage reads at about half and then will fluctuate. What could be the problem?


Check your coolant level. When the level goes down, the heater is usually the first unit to show the lack of coolant (no heat). As the coolant decreases, eventually the temperature sensor is intermittently 'out of the water' and can't indicate water temperature, causing the fluctuation. If your coolant is low, find and repair the leak.

Jan 27, 2010 | 2003 Chevrolet Impala

3 Answers

2001 Pontiac Montana Temperature Gage and Fuel Gage malfunction


sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

Nov 02, 2008 | 2001 Pontiac Montana

1 Answer

Temperature and fuel gages are not working


Take it to a Dealer and have your gauges reset - you should also have your water pump replaced and you might as well have the Timing belt replaced also (usually at 80-90K)

Oct 05, 2008 | 2005 Volkswagen New Beetle

Not finding what you are looking for?
1997 Jeep Grand Cherokee Logo

509 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...