Question about 1993 Buick LeSabre

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My mechanic installed a thermostat that was too small for the car. Could this cause any problems to the car at all. Should I have someone install the right size ??

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Yes because you might be able to pass inspection if your car doesnt reach a certain temp. This is because of emission reason but your car will run cooler so need to hurry till you inspection time is near.


Posted on Nov 09, 2010


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I'm buying a used truck/SUV. It disclosed an engine light code p0128. My question is it more expensive to purchase parts & repair myself. Or would it be worth having a mechanic fix it & look it over?

It depends on the vehicle. 9 times out of 10 this code means the thermostat has failed, of course I'd try that first. I do not know what mechanical skills you possess or what type of vehicle you're asking , so I can't really answer the second part of the question. Some tstas are easy, other ones require a lot of work.

Aug 23, 2015 | 2001 GMC Sonoma Extended Cab

1 Answer

What could cause my car to over heat when I replaced my water pump and thermostat

Hello Martin, I have seen someone install a thermostat upside down . This causes the thermostat to not open . Was the engine overheating before you replaced the water pump and thermostat ? If the engine has been excessively overheated, this could cause a blown head gasket .

Mar 17, 2015 | Cars & Trucks

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Slight overheating after driving 15 miles. there seems to be no loss of antifreeze. radiator is full. overflow is full. the radiator was replaced 5 months ago both hoses also.

You could go back to the place that did the radiator / hose work to have them check it out. You may pay more for the solution - but it will be complete. You could check (or replace) the thermostat on your own, or continue searching for a possible fault. This can get even more expensive if you start replacing parts.

To check the thermostat - remove it from the vehicle when cold. Be careful to prevent spilling / loss of coolant when removing from car. The thermostat should be closed. Place in a small pot and fill with water to completely cover the thermostat. Heat the pot on stove set to "high". The thermostat should open depending on the temperature value (185 degrees , etc.), but all thermostats should open before the water comes to a boil (212 degrees). If it opens fully, the thermostat is OK. You could reinstall it - or since it is already apart, install a brand new thermostat instead. If it does not open, it should be replaced with a new one.

Check the fan. With the engine running, the fan should be spinning if a mechanical type. If electrical, the fan will turn on and off as determined by a separate electrical thermostat for the fan. When the engine approaches operating temperature, the fan will be switched on. When cooled sufficiently, it will switch off. If the mechanical fan is equipped with a clutch - the fan should be able to be rotated with the engine off. It should offer some resistance - but should turn never the less. The part of the fan in contact with the drive belt shouldn't move if there is a clutch. Under no circumstances should a mechanical fan spin freely, nor should it wobble. Electric fans should spin freely however.

An important note about fans: After driving the car and shutting the engine off, it is not unusual for the electric fan to start up - even without a key in the ignition. Never attempt to touch a car's electric fan blades unless the engine is COLD. Never reach into the fan area or protective shroud of car's mechanical fan when the engine is running.

Another thing that could be causing a problem is the water pump. If it is failing, the coolant will not effectively circulate between the radiator and engine block. This will cause the engine to overheat.

An obstruction in the cooling system will have a similar result. Some "leak stopping additives" can reduce coolant flow in the system to cause similar overheating issues.

Good luck!

Oct 07, 2011 | 1998 Pontiac Bonneville

1 Answer

I have a mitsubishi Pajero 2.5tdi vehicle with 52,000km on the clock,for the past year it has continued to overheat resulting in new and second hand cylinder heads replacement,it has now happened again...

A vast problem, start off by checking the thermostat, replace it, do not try running without it. Next have the radiator and the engine block flushed out professionally. A head gasket as such will not cause overheating unless it has been incorrectly installed. (Was the radiator back flushed after the first occurence of overheating?)

Jan 16, 2011 | Mitsubishi Montero Cars & Trucks

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One mechanic said need new water pump another said new radiator for overheating problem ?

Overheating is caused by a thermostat being stuck closed, low fluid level, or blocked passages (which can be repaired by flushing out the engine and cooling system and installing new antifreeze).

Sep 18, 2010 | 1995 Mercury Villager

3 Answers

2004 sentra overheats, new waterpump and thermostat. no heat out of heater. is there a second thermostat?

Are you sure there is not a air pocket in the engine after changing water pump,
there is only 1 thermostat

Nov 19, 2009 | 2004 Nissan Sentra

1 Answer

Have heating problem thermostat replaced

Thermostat replacement on 3.4 liter, Not the thermostat housing is between the Throttle body and exhaust crossover. If you have small haves and the right tools you can remove the two botls without removing the crossover and throttle body. The bottom bolt to the thermostat does not have to come all the way out, there is a cut out on the housing so you can slid it out. Good luck and take your time.

  1. Remove the air cleaner and duct assembly.
  2. Drain the coolant until the coolant level is below the thermostat.
  3. Remove the crossover exhaust pipe.
  4. Remove the radiator hose from the thermostat housing.
  5. Remove the thermostat housing bolts and clean any sealer from the bolt threads.
  6. Remove the thermostat housing and gasket.
  7. Remove the thermostat.
  8. Install the thermostat.
  9. Install the thermostat housing bolts and tighten them to 18 ft. lbs. (25 Nm).
  10. Install the radiator hose to the thermostat housing.
  11. Install the crossover exhaust pipe.
  12. Install the air cleaner and duct assembly.
  13. Good luck...
  14. Fill the cooling system.
  15. Install the thermostat housing and gasket.
  16. Clean the mating surfaces.

Nov 11, 2009 | 2001 Oldsmobile Alero

1 Answer

Car wont start, sounds like out of gas but tank is full

A car not starting can be caused by many, many things.........but...................a bad thermostat or a good thermostat will not cause or keep a car from starting in any way. you need to know if it is getting gas to the cylinders........and to check for spark at the cylinders.......pull a spark plug wire at the spark plug, pull the spark plug and see if it looks wet or smells like strong gas odor....then plug wire onto spark plug, (without re-installing spark plug), and hold spark plug onto a grounded metal object on engine (using a rubber insulated object, so you don't get shocked), then have someone turn engine over and look to see if spark plug sparks........if yes, re-install spark plug, etc.......your ignintion is sparking, but if you are getting fuel, it may be a jumped timing chain? You may need mechanical help........don't trust the person that told you about a thermostat........

Jul 16, 2009 | 1997 Chevrolet Malibu

2 Answers

99 v6 camaro overheats and heater not working

My dad used to weld the cracks with JB weld. He would make aV shape line in the crack with a grinder and fill it in. I had a 79 GMC pickup that he fixed. I sold the truck several years later and it never leaked.But then again the heads were cast iron then.If your loosing coolant . That's why your heater is not working and your car . Take it back as WORKFORIT1 suggested and tell them about it.You are the one paying for it.

Jan 11, 2009 | 1998 Ford Explorer

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