Question about 1997 Pontiac Grand Am

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Loses coolant at high rate. always had an overheating problem. engine seizes. now won't start. thermostat? water pump?

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Possible blown head gasket

Posted on Mar 25, 2011

  • Sharon Mar 25, 2011

    really? how do I confirm?

  • cy schousboe Mar 26, 2011

    Do a compression check on the engine. A variation of more than 10% between cylinders would confirm a bad head gasket. Hope this helps.

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Changed out water pump and thermostat and vehicle runs high temperature what could be issue?


Reasons the Temperature Gauge Reads High

If the temperature gauge reads high, it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant. A third reason your temperature gauge reads high could be because the thermostat is broken. If this is the case, you may need a coolant temperature switch replacement. The last reason the temperature gauge could read high is because of a water pump, or water pump gasket failure. If the water pump is malfunctioning, it may need to be replaced by a professional.

What to Do If Your Temperature Gauge is High

If your temperature gauge is reading high, it means your car is overheating. This is a very serious matter and you should never drive an overheating car. If your car starts to overheat, shut off the air conditioner and open the windows immediately. If this does not reduce the overheating, turn on the heater as high as it can go. If this still doesn't work, pull over on the side of the road, turn off the engine, open the hood carefully, and wait until the vehicle cools down. Never open the radiator cap while the engine is hot - coolant can spray and burn you. Once the vehicle has cooled, take the car to a mechanic right away so they can diagnose the problem. Cars are especially susceptible to overheating in hot climates, like what's common in cities like Los Angeles, Phoenix, Las Vegas, or Atlanta.
The temperature gauge is an important tool in your vehicle that shows the temperature of your engine's coolant. Contact YourMechanic and have your car inspected for overheating if it reads too high, as this can cause serious problems...

Reasons the Temperature Gauge Reads Cold

On most vehicles, the temperature gauge reads cold until the engine has run for a few minutes. If the temperature gauge still reads cold after the engine has warmed up, the gauge may simply be broken. Another reason the temperature gauge could read cold is if the thermostat in the vehicle stays open. With the thermostat stuck open, the engine can be overcooled, causing a low temperature reading. If this is the case, the thermostat may need to be replaced.

Oct 28, 2017 | Cars & Trucks

2 Answers

Car overheating causing fluid to come out of the reservoir


Change your thermostat. Ensure that your radiator fan is running at idle. See if your heat blows warm or not when the engine is warmed. if the heat is clod, then you have no water circulation in your engine. either the thermostat isnt opening up, or there is a blockage in your cooling system.

Jan 11, 2017 | Cars & Trucks

2 Answers

Overheated. Why won't it start?


I'm not really familiar with JEEP mechanics but if you've replaced your water pump and it's still overheating with full water/coolant level, you should check the thermostat; when it fails, it's a common cause or overheating in all kind of cars

I'm attaching some links to Youtube tutorial about replacing thermostat in a Jeep but you can expand your Google search using terms
Youtube replace thermostat JEEP Liverty

https://www.youtube.com/watch?v=Y3NpLdG993U

Jeep 4 0L straight six thermostat replacement

Thermostat Replacement Overheating fix Part 1 Jeep


How To Change the Thermostat in Jeep Wrangler


2002 Jeep Grand Cherokee Thermostat Replacement

Replacing the radiator thermostat in any Jeep Cherokee Jeep liberty Jeep...




Sep 10, 2015 | Jeep Liberty Cars & Trucks

1 Answer

98 Chevy Malibu won't start after replacing thermostat?


replace thermostat did bleed coolant system check coolant level.because if not engine could have overheated and blowed headgaskets warp or cracked the heads check engine compression.sound like engine got too hot.

Jan 08, 2013 | 1998 Chevrolet Malibu

2 Answers

Coolant doesn't circulate in raditor. Also coolant blows back through raditor.


the coolant is probably not circulating because either the water pump impellers are worn or broken off of the shaft,the rad maybe plugged or possibly the thermostat has seized closed causing a restriction in the system.the coolant blows back because its not circulating and over heating and will escape were it can.

Apr 10, 2011 | 1995 Pontiac Firebird

1 Answer

Im having a problem with my 01 civic. its overheating when i raise my rpms, but if i stay low on rpm guage no overheating. then i lose a little coolant and heater starts off fine but loses heat. is this my...


I would start with the thermostat. sounds like it could be in stuck in the closed position, not allowing coolant to circulate the engine. Its very easy to change and inexpensive

Mar 22, 2011 | Honda Civic Cars & Trucks

3 Answers

Took out the thermostat, replaced the radiator, the water is circulating in the radiator but it is still running hot. what do i do next?


Overheating can seriously damage a car's engine if left unchecked. Although overheating simply means that a car's engine temperature exceeds normal operating temperatures, the causes of overheating are varied. What follows is a brief list of some of the most common causes of engine overheating.

    Faulty Radiator
  1. A car that overheats will often have a faulty radiator. A radiator is responsible for cooling hot engine coolant that picks up heat from inside a car's running engine. A radiator "radiates" the heat from engine coolant out into the outside air. A faulty radiator loses its "radiating" effects and allows engine coolant to become overheated, thus rendering it ineffective at adequately cooling and engine.
  2. Faulty Water Pump
  3. A faulty or malfunctioning water pump prevents adequate engine coolant flow and can cause a car to overheat. A water pump serves to pressurize and propel engine coolant throughout a car's engine and radiator to increase the heat-reducing capabilities of engine coolant. A faulty water pump loses its ability to adequately pump and propel engine coolant, and can cause a car to overheat.
  4. Coolant System Leaks
  5. A leaky engine coolant system reduces the level of circulating engine coolant, which increases engine temperature and leads to engine overheating. Radiators, water pumps, and coolant system hoses and seals--all of these coolant system parts can develop leaks, which can result in low coolant levels and engine overheating.
  6. Faulty Thermostat
  7. A car thermostat regulates the flow of engine coolant. A thermostat is a heat-sensitive valve that opens when a car engine reaches a set operating temperature and closes when a car engine is cold and warming up. If a thermostat gets stuck in the closed position, coolant will be prevented from reaching the engine, which will quickly lead to engine overheating and potential engine damage.
  8. Low Engine Oil Level
  9. Engine oil, in addition to lubricating an engine's internal parts, helps to keep engine operating temperatures reduced by eliminating friction within the engine. If engine oil levels are low, friction and heat build up inside an engine, a condition that causes increased engine operating temperatures and can lead to engine overheating.

Jan 15, 2011 | 1998 Isuzu Rodeo

2 Answers

My car's over heating and losing water. 2004 Suzuki Verona. Is this the thermostat?


Yes, it could be the thermostat, but overheating may also be caused by many other things. Ensure engine tune or other mechanical disfunction is not contributing to the overheat problem.
Replace the thermostat, but if overheating persists I suggest you carry out the following checks:-
1) Check coolant system is not leaking fluid due cracked/perished hose or hose fitting, leaking water pump etc,
2) Check engine cooling fan/s are operating as required when engine temp rises above cut-in threshold - check fan control relay is ok,
3) Check for collapsing radiator hose on suction side of water-pump when motor revs raised above idle.
4) Check coolant reservoir pressure cap is serviceable,
5) Check coolant system is properly filled - carry out any bleed off procedure specified to clear any air locks- (ensure heater core coolant flow is turned on).
6) Check condition of radiator core:-
i) for blockage of air flow to (bugs/grass etc),
ii) for core internal blockage to coolant flow,

Nov 15, 2009 | 2004 Suzuki Verona

2 Answers

93 lexus gs 300 overheats. i changed water pump, thermostat, radiator cap. still overheating??? what could it be???


Try blowing the radiator fins out (from the inside) with compressed air--bugs and other debris can clog the air flow. Do the radiator fan(s) run when hot? If not, check for blown fuse, seized fan motor(s), bad relay, or bad engine thermal sensor. Is it losing coolant water from somewhere?

Jul 16, 2009 | 1993 Lexus GS

1 Answer

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

Jul 19, 2008 | 2003 Volkswagen New Beetle Convertible

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