Question about 1998 Chevrolet Cavalier

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Where is the thermostat on a 1998 Chevrolet Cavalier?

I am trying to replace the thermostat and I also would like to check to ensure the coolant is in the radiator. However. I cannot find the cap that's directly connected to the radiator.

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  • youngmisty1 Mar 07, 2009

    I am trying to put on a new tremostat on my 1998 chevy but need to fine out where it is locate so that I can get it change

  • Anonymous Mar 18, 2014

    I changed the thermostat because it was fluctuating and now it doesn't work at all I have tried to reset the code but it's still not registering

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GM took new design to move the thermostat closet to bottom radiator hose BEFORE THE WATER PUMP (rocket science on DRUG) Look down by the exhaut pipe between the alternator and exhaust pipe, there is a radiator hose running into a housing that runs into the lower block. Take off housing that 2" hose hook up to and you will see that the thermostat IS in there. They should of never design it this way because the thermostat closes to early letting the engine stays too hot ( the thermostat SUPPOSE TO BE AT THE HEAD AREA ((AFTER THE WATER PUMP--NOT BEFORE THE WATER PUMP)) IDIOT DESIGN!!! MAKE A HOUSING OF SOME KIND WITH TWO 2" MALE ENDS AND MOVE THE THERMOSTAT AT THE TOP OF ENGINE HEAD AREA BEFORE THE RADIATOR BY CUTTING UPPER RADIATOR HOSE AND ADDING A BOX OF SOME KIND THAT WILL HOUSE THE NEW THERMOSTAT THAT RUNS INTO TOP OF RADIATOR (WHICH IS THE REAL HOT AREA--THAT WILL KEEP THE ENGINE AT CONSTANT 180 DEGREE AND NOT 200 PLUS DEGREE CAUSING EARLY HEAD GASKET FAILER! USE ORANGE HIGH TEMP GASKET SEALER AT OLD THERMOSTAT HOUSING AND LEAVE IT OPEN TO FLOW FREELY AND LET THE NEW THERMOSTAT DO THE REAL JOB THAT IT IS SUPPOSE TO DO... I AM SHOCK THAT SOME IDIOT WENT AHEAD WITH THIS STUPID DESIGN!! URGH

Posted on Aug 14, 2012

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There probably isn't a radiator cap. some cars only have a cap on the resivior tank. if your coolant is low, it'll show in that tank. follow your upper radiator hose to engine. thermostat should be at the end of it, depending on what engine you have

Posted on Dec 01, 2008

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1 Answer

What would cause 98cavalier to overheat while sitting still


multiple possibilities. thermostat bad. loose fins on waterpump. cooler fan not engaging for some reason - fuse, etc. low amount of coolant. start with simple things first - coolant - check to see if fan engages - thermostat.

Jun 03, 2014 | 1998 Chevrolet Cavalier

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I have a 98 cavalier and it keeps over heating any pointers


First, look for leaks and make certain your radiator and overflow are full-do you have heat? If not, you may have a closed thermostat. If you have antifreeze in your oil, or notice smoke coming out of your tailpipe when the car is fully warmed up, you may have a blown head gasket.

Dec 23, 2010 | 1998 Chevrolet Cavalier

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How to replace thermostat on 1998 Chevy Cavalier 2.2


Pull lower hose off thermostat housing. Unbolt the 2 thermostat housing bolts(7mm or 8mm). The remove thermostat and replace with new one with new seal. When filling cooling system there is a bleeder plug on right side of engine. 7mm bolt needs to be removed and when coolant comes out replace plug.

Nov 28, 2010 | 1998 Chevrolet Cavalier

1 Answer

How do I remove the thermostat on a chevy cavalier 1998


this is copied from the autozone website.

CAUTION
If the radiator is filled to the top with coolant and the engine is run without the radiator cap in place, the coolant will expand and spill over as the engine warms up.
  • Drain some coolant into a clean container until the coolant level is below the thermostat housing.
  • Remove the upper radiator hose connection from the thermostat housing.
  • Loosen the housing bolts and remove the housing.
  • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Some engines use a rubber O-ring to seal a thermostat housing.
  • Compare the size of the thermostat to the old one. They are of different sizes, types, and temperature ratings.
  • The temperature rating is stamped on the sensing bulb on the bottom of the thermostat. The temperature bulb faces the block.
  • When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing. If the thermostat is installed upside down, the engine will overheat.
  • Install the gasket.
  • Reinstall the thermostat housing. Refill the system and run the engine or pressure test to check for leaks.
  • When the engine has reached operating temperature make sure the thermostat opens.
  • You should be able to see coolant circulating within the radiator.
  • Another way of checking thermostat operation is to feel the top of the radiator hose or use a thermometer or multimeter with a temperature probe to confirm that the coolant is warming up.
  • If the engine is overheating, but the top hose is still cool to the touch, the thermostat is stuck closed and must be replaced.
NOTE
When a paper gasket is used and the recess is in the thermostat housing, it is a good practice to position the thermostat into the recess and glue the gasket to hold it in place. If it falls out of its groove during installation, the outlet housing can be cracked or a coolant leak will result. Before tightening the water outlet housing, try to rock it back and forth to be sure it is flush. Housings are often cracked during this step.

Mar 11, 2010 | 1998 Chevrolet Cavalier

1 Answer

My temperature gauge will go half way then drop


First thing you need to do obviously, is check your coolant level. If coolant level has been checked and all is well, then I'd look at replacing the thermostat.

Sep 12, 2009 | 1998 Chevrolet Cavalier

1 Answer

Coolant temperature relay switch


Most vehicles use a coolant temperature sensor which is located near the thermostat directly connected into the coolant line, or near the thermostat housing, there are relays for the cooling fan which is usually located in the power distribution box under the hood.

Mar 16, 2009 | 1998 Chevrolet Cavalier

1 Answer

Car overheated


You will need a decent manual for this...just too much text to re-write here. Before you start job though, is electric fan coming on? You are certain that the thermostat is opening? Do you see a coolant leak from pump? Check this stuff out or you will be wasting time and $$$

Mar 15, 2009 | 1998 Chevrolet Cavalier

1 Answer

My 1998 chevy cavalier runs hot in slow traffic.


have you replaced the coolant tempeture sensor.

Oct 31, 2008 | 1998 Chevrolet Cavalier

3 Answers

Cavalier coolant leaking


Try to remove the thermostat and run it without it. If it does not overheat then you just have a defective one if you have replaced it. Or ou accidentally put it in backwards. It will not hurt anything.

Aug 22, 2008 | 1998 Chevrolet Cavalier

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