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Toyota ipsum 4wd 2001

My car overheats and all the water gets finished. i have to add water everyday.what could be the problem?When it first overheated and the temperature was shooting to maximum;,it finished all the water in the radiator, therefore i added water instantly and unfortunately blew up the head gasket. I removed the thermostat; replaced headgasket, timing belt, coolant, oil filter, oil.I sealed the leaks on the radiator also.the mechanic advised me to also disconnect the cable that goes to the thermo-timer-sensor-switch.From then on every morning it refuses to start the engine;i have to try three or more times and when it finally starts, if i engage gears, it vibrates and switches off on its own. I have to try again two or more times then i can now drive and go, but at first the engine will be running very slowly even if I accelerate more, then it will pick up later. i then went for a diagnostic check to another mechanic, and the test indicated that there was a problem on the thermo-timer sensor switch.I noticed that if i re-connect the cable to the thermo-sensor switch, the car starts properly and instantly and no more vibrating or switching off of the engine on its own.BUT it then starts overheating and water-boiling again wen i travel.Please help.What could be the problem?how do i fix theis problem? is it advisable to run the car without thermostat?im desperate.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: Overheating

Hi,
If the car is overheating it could be due to a thermostat which is stuck in the closed position, a failed water pump or just a slack belt driving it. I think there will be a "little" tube carrying coolant from the engine to the coolant expansion tank, and if you run the engine with the filler cap removed you should see water coming through that pipe IF the rump is running. A failed water pump will not necessarily leak, it just won't pump the water round the engine.

Always take care when dealing with a pressurised cooling system on an overheating engine - the water may well be above boiling point.

If you run the engine without coolant the cylinder head may well warp and repair bill will be huge.

Hope this helps you a bit. D

Posted on Jul 20, 2008

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  • 174 Answers

SOURCE: my 87 mazda rx7 is overheating with a high idle,

I would replace both the pump and the thermostat. Start with the thermostat, it's the cheapest fix.

Posted on Nov 09, 2009

ajsgolfer
  • 1 Answer

SOURCE: 1993 Toyota Camry V6: Coolant Overheating Problem.

how do u change the water pump in a 1993 toyota camry v6 engine?

Posted on Dec 25, 2009

  • 264 Answers

SOURCE: 1995 BMW 525I over heating issue. I repaired head

Hi, Sounds like you have tried about everything. Ok the aux. coolant switch is for the electric pump for the heater core will not cause an over heating condition just a longer warm up of the heater core. Has the cooling system been bleed properly if there is a trapped air pocket it will not let coolant circulate. Was the new thermostat installed correctly? They have a vent that needs to be towards the top or they trap air on the back side and cant take an accurate reading to open and close. Other areas to look at would be proper operation of the fan clutch, if they fail they can cause the fan to not lock up properly and supply enough air movement through the radiator. The aux. electric fans and their temp switches do you hear them coming on are they coming on at the right temp.

Posted on Aug 26, 2010

  • 5370 Answers

SOURCE: 2002 chrysler concorde overheating while

Did you bleed the air out of the system after replacing the thermostat?

For air bleed procedure click the link below:--- http://technoanswers.blogspot.com/2011/07/bleed-air-out-of-system-after-replacing.html ------------
The other cause for over heating can be head gaskets. I agree that you mentioned head gasket checked ok, but still get it rechecked.You might still consider having a mechanic perform a leak test at the radiator cap with a special tool.
Next wuld be to check if the radiator fan is turning on. A fast way to do that is by unplugging the two-wire coolant temperature sensor while the ignition switch is on. That should cause the fan to run. If it does not, there might be a blown fuse for the fan. The best way to diagnose it is by using the DRB3 scanner to command the fan to run. ---------
If this checked out ok and still there is overheating problem.Then check if thermostat is opening.-------- If its not opening then yes car will overheat, even you replaced the thermostat, click this link below to troubleshoot thermostat problem even after its replaced:--- http://technoanswers.blogspot.com/2011/07/thermostat-replaced-but-still.html ------------ This should help.Thanks.Helpmech.

Posted on Jul 10, 2011

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