1999 Chevrolet Silverado 1500 Logo
Anonymous Posted on Feb 28, 2012

Overheating when driving

My truck will idle fine without overheating, but as soon as you start driving it overheats to over 260 degrees. Already flushed the radiator, replaced the thermostat, drove without a thermostat and it still over heats. Also, the fan clutch doesn't appear to be slipping at all. Any suggestions?

1 Answer

Anonymous

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  • Expert 67 Answers
  • Posted on Feb 29, 2012
Anonymous
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Joined: May 22, 2010
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Sounds like the water pump fins aren't doing their job. I suggest changing the water pump. Been there, done that. Bad pump.

5 Related Answers

Anonymous

  • 631 Answers
  • Posted on Jul 30, 2009

SOURCE: 2004 dodge ram overheating

How hot are you talking? You checked your cooling fan? You know your water pump is good? Not loosing any anti-freeze anywhere?

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PK in Dallas

  • 5 Answers
  • Posted on Oct 21, 2008

SOURCE: 2002 VW Jetta Overheating

Stop driving the car asap, have it checked and fixed, otherwise you could be facing very expensive repair in the ery near future.

Anonymous

  • 1 Answer
  • Posted on Feb 21, 2009

SOURCE: ford ranger truck overheating

I have had this happen with my ranger. Changed everything I could to try to fix the over heating. It turned out that I had a small leak in my head gasket and it was allowing exsaust gas to go into the cooling system witch was over pressurizing it. Also the air from the exsaust will heat up much faster than liquid making your thermostat to read hot and will not be able to blow hot air in the cab because there is no liquid going to the heater core. This happened to me when my blet came off and I tryed to make it home. If you had it over heat for a long peirod of time it may have ripped the head gasket.

Andrew Portelli

  • 298 Answers
  • Posted on Mar 29, 2009

SOURCE: Overheating fiat seicento

I hope you have managed to solve the radiator problem by now. Seicento seem to suffer from water flow blockage in the heater blower area. I recommend you check the piper behind the carburator and make sure water is flowing. Normally when these pipes are blocked, water will flow back to the expansion tank and start leaking through its cap. You can also open the small screw on the small pipe coming out from the back panel behind the carburator and see whetehr water flows. Also, if the water is heard grumbling when engine is switched off, it is highly likely that the water is not flowing through the heater unit. Hope this helps.

Cheers,
Andrew

Anonymous

  • 3 Answers
  • Posted on May 01, 2009

SOURCE: My Jeep overheats while sitting idle. When I drive, the gauge goes down quickly. I have had thermostat and fan changed. I have also had the radiator flushed. What can it be?

Check your water pump and also sometimes a radiator flush is not good enough more than likely the radiator is blocked you have take to a radiator expert and have pulled apart and cleaned thoroughly 

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-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

---------------------------

Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
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