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Last night I was driving home and the temperature gage was going high. The coolant was full but bubbled for a while. Bubbling slowed, & I nursed it home w/gage going above half and back down & so on.

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  • Cars & Trucks Master
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Stuck thermostat or blocked up radiator or heater core.

Posted on Aug 11, 2017

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  • Cars & Trucks Master
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Could be low coolant.

Posted on Aug 09, 2017

Testimonial: "I pulled over to check and it was full. Started the engine just to top up a little and it started bubbling. The bubbles slowed down after a while and when I was heading back was when the temperature was going up and down. But this time wasn't going dangerously high, so was only going over half then back under again, but I didn't want to push it......"

  • Brad Brown Aug 11, 2017

    Bubbles coming out of the radiator with the engine running are a sign that the head gasket on the engine is failing and allowing exhaust gasses into the coolant. There is a test that you can run to verify but you are looking at thousands in repairs

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Posted on Jan 02, 2017

hi99ins
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SOURCE: engine temperature reading high

Faulty temperature sensor I think, thats what feeds the gauge. If the vehicle is genuinely running hot there would be a lot of pressure in your radiator causing overflows/steam/coolant smell.
Those sensos wear out and commonly go to short which shows a higher & higher reading until they fully short out
...hope that helps.

Posted on Jan 09, 2009

Sergey2121
  • 46 Answers

SOURCE: COST OF REPLACING A THERMOSTAT ON A 2004 IMPALA

Thermostat itself is like 8 dollars, from Kragen, or Autozone.

Posted on Apr 08, 2009

  • 1779 Answers

SOURCE: 2003 Honda Civic runs hot when idling.

Check the cooling fan switch. It appears your auxiliary electric cooling fan isn't going on when at idle. and engine temp increases. While you are driving, air is being rammed thru your radiator as you cruise along, so it isn't overheating, at idle, that isn't happening, and the fan should go on as the temp goes up. When the ac is switched on, the fan is being signaled to operate due to the heavy ac load on the cooling system.

Posted on Apr 27, 2009

localwonder
  • 6784 Answers

SOURCE: Oil pressure gage stuck on high

HI, you will need to replace the oil pressure sending unit(pressure switch), it has failed.

Posted on Jun 21, 2009

chris bean
  • 61 Answers

SOURCE: my temperature gauge keeps going up and down when

pull off the hose at the top of the motor, if you can see the thermostat try pushing on the center with a screwdriver, it is most likely stuck open. You may be able to free it by pushing the center back and forth till there is no longer any resitance, but it needs to be replaced. As for the temp sensor, if it is bad the guage will flicker, representing a bad connection. If the gauge just rises and falls by pattern the sensor and wiring is probably fine.

Posted on Mar 28, 2010

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1 Answer

Temperature gage mid point will go back down and back up. heat ok.


You have a sticky "thermostat" valve.
It should stay "closed" until the engine warms up,
then open, to allow more coolant to cool the engine down.
If it is "slow" to open, your engine gets too hot, until it does open.
Then, the coolant cools down the engine, until the thermostat finally closes again.

Feb 24, 2015 | Cars & Trucks

1 Answer

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my guess is a blown head gasket. I would do a compression test on all cylinders to be sure. these engines wont stand much high temperature running before blowing the head gasket. you can rent a compression tester from your local autoparts store usually for free.

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assuming you didn't put thermostat in upside down, your system may need to be flushed. if radiator is blocked you can feel a cold spot at the blockage when the motor is warm

May 06, 2014 | Cars & Trucks

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The heater does not work there is no thermostat in right now and I also have a temperature gage that flux and what she wakes up and down it's normal when moving and go as high or when idling


The thermostat is used for the heating system. It slows the antifreeze down in your radiator to allow it to warm up before its cycled through your heater core. Put the thermostat back in, heater will work. Will also regulate flux temps.

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Last Wednesday I was driving home on the freeway and I noticed that the temperature gage started going up - immediately I pulled over and turned off the car. A man stopped on the side of the road helped me...


Out of the blue temperature increases are usually caused by either a bad water thermostat (sticking closed)
http://thm-a03.yimg.com/image/86e71b78cb3f45aa

or a bad radiator fan temperature switch.

Either one can be repaired in less than 1 hour.

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U have a problem with the air temp control blend door actuator motor, very common failure. In order to replace this part the dash must come out.

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Temp Gage shoots up and down


POSSIBLY A FAULTY THERMOSTAT

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