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92 grand am 16v overheats running normally but cools revving the motor. Car came w/o thermostat or it's housing. hoses mount straight to block. Is this my probably? Or is it my water pump?

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  • Cars & Trucks Master
  • 1,087 Answers

Yes you need the thermostat and housing if you want heat in the winter. When the water pump goes you normally hear the bearing making alot noise. I would be thinking a wore out hose collapsing causing your issue.

Posted on Apr 07, 2015

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6ya6ya
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Posted on Jan 02, 2017

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gordanddar
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SOURCE: 1995 Chrysler Cirrus overheating

Probably not water pump. Engine is notourious for vapour lock.
Cooling system must be blead of air before thermostat will work. Cool bottom rad hose is a dead give away. If you are still watching this forum reply , and I will walk you through the only way I know how to make it work properly. It's actually easy if you do it my way. I have worked on lots of cars , and this engine was the hardest to bleed out. Did one Yesterday , and works perfect.

Posted on May 16, 2010

Testimonial: "I need help on how to bleed the system thanks"

localwonder
  • 6784 Answers

SOURCE: Bublling in the thermostat housing and very hot upper radiator hose

I recommend flushing the radiator thoroughly if not done recently. there seems to be some sort of blockage in the radiator at this time. if you get lots of metal fragments that are flushed out during this flush, i will then recommend a rebuild on the radiator or replacement of the radiator. make sure the cooling fans are cycling on time as well.

Posted on May 21, 2009

  • 121 Answers

SOURCE: I have a 2000 Pontiac Sunfire. It keeps

i'm not being smart, but do you know for sure you are installing the thermostat correctly? the thermostat is there to slow the water flow down long enough for the water to obsorb the heat .also is the cooling fans operating ?do the fans come on at around 210 degrees?is the radiator grill clean? lower spoiler intact? does the engine over heat at highway speeds or while idling? are there any codes?is the engine running lean? possible fuel filter stopped up.fuel injectors dirty. let me know

Posted on Dec 03, 2009

  • 214 Answers

SOURCE: 1997 honda civic over temp. Have replaced

Generally if one hose is hot, and the other hose is cold it indicates that they water is not circulating. You could have a defective thermostat. Take the thermostat out and run the engine without it. With the radiator cap off you should see a lot of water moving through. It that is the case, replace the thermostat and you should be ok. If there is no rapid movement of water it may be the impeller on the water pump came loose. This is rare, but it can happen since the impeller is usually pressed on the shaft. You should also check and see if you get a lot of bubbles when the car is running and the cap off. This often indicates a blown head gasket. Hope this helps.

Posted on Aug 10, 2010

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Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
or water pump opening

sacrifice an old radiator hose to adapt a garden hose fitting
for radiator flush

air in system fix
your thermostat housing has no air bleed valve
no top radiator cap

old school way
heater on full
run motor till thermostats fully open
burp radiator hoses
wait till water is running up into over flow bottle without bubble
replace cap
turn off heater
correct level in over flow bottle

why still over heating
you fitted everything i would have ... yet still overheat
possibles
leaking inlet manifold gaskets
hose clamps loose
cooling fans spinning too slow
thermostatic fan switch faulty
aluminum radiator is a big one
air ..fins bent or some water channels blocked

or possible head gasket leak




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Nov 02, 2016 | Cars & Trucks

1 Answer

1999 grand prix gt overheating. Changed thermostat, water pump, upper radiator hose. Please help!


does the upper and lower hoses seem to be the same temp when car begins to overheat? ore the radiator cooling fans coming on before the car overheats? did you pressure test the cooling system and radiator cap? also may want to remove the lower hose and flush the radiator. is the check engine light on and does it run bad?

Aug 03, 2011 | 1999 Pontiac Grand Prix

2 Answers

Kia spectra 2000, what causes over heating?


Hi and welcome to FixYa!

Few things why the car overheats, here are the following:

- Weak radiator blower motor
- Clogged radiator
- Cracked head or head gasket
- Faulty water pump (coolant will not circulate if it's faulty)
- Worn out radiator hoses
- Coolant reservoir overfill (coolant overflows)

You will need to have them replaced to resolve the problem. Hope this helps and thank you for using FixYa! Have a good one!

Feb 21, 2011 | Kia Spectra Cars & Trucks

1 Answer

I'm trying to locate the thermostat on my 2000 jeep grand cherokee


  1. On 2000 Jeep Grand Cherokee 4.7L V8
  2. Remove lower radiator hose clamp and lower radiator hose at thermostat housing.
  3. Remove thermostat housing mounting bolts, thermostat housing and thermostat.

2000 Jeep Grand Cherokee 4.0l v6
Note:on the In-line 6 4.0L model the thermostat housing is mounted at the top of the engine block next to the water pump.

Nov 14, 2010 | 2000 Jeep Grand Cherokee

1 Answer

My pontiac grand am 2.3 1994 started to overheat for no reason...coolant is full qondering if it w\could be the thermostat..tried locating it to the housing by the power steering hose opened the housing...


change thermostat . if nothing there under housing by the powersteering pump then it dont have one in it ,need to put one in .water pump up on pass. side behind timing housin. this motors bad for head gasket leakin

Nov 01, 2010 | 1994 Pontiac Grand Am

2 Answers

A diagram of how to install a thermostat in a 1999 pontiac grand prix


I don't have a diagram but just text instructions which follow:

Test/Replace

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.

Oct 28, 2010 | Pontiac Grand Prix Cars & Trucks

1 Answer

98 deville 32 valve North Star OVERHEATS after 33 miles of drive ?? does not overheat in town overheats out on highway and after slowing down- fans dont cool motor unless stop engine ,have changed radiator...


The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.
Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.

Jul 14, 2010 | 1998 Cadillac DeVille

2 Answers

2002 grand prix motor 3.8 just want to know where


Exploded view of the thermostat arrangement—3.8L engines

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Oct 31, 2009 | 2002 Pontiac Grand Prix

1 Answer

Where is the thermostat located in a 1990 acura legend? The engine overheats when it is running down the road and cools when the car is stopped. can anyone help?


Follow the upper radiator hose and where it is attached to engine block, that is where the thermostat housing is. SHould have 3 bolts on it.

Aug 05, 2009 | 1990 Acura Legend

2 Answers

Car runs hot - can overheat


try flushing the cooling system and then bleed the cooling system. hope this helps.

Oct 17, 2008 | 1996 Saturn SL

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