Question about 2002 Pontiac Grand Prix

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Water pump works intermittently is this a fuse?

Works sometimes then stops working but engine temperature inidicator does not go above 180 - 200. Low Coolant light comes on but radiator is full and so is the overflow container but the block does heat up

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There is no way for pump to work sometimes and not others. a couple possible things could be sticking thermostat. vanes on pump corroded off. if temp gauge does not go up how do you know block is overheating?

Posted on Dec 29, 2008

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Coolant level keeps getting very low?


Check the upper intake gasket, you may have a leaking gasket. Check the bottom of water pump and see if it is leaking, if so pump needs replaced. The seal within the water pump sometimes goes bad and leaks out seep hole on water pump bottom. Make these checks with engine off!!! God-Bless!

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2004 Audi A4 continued cooling system issues! HELP please!


The rising and falling temp gauge indicates a low water level in the cooling system as hot water is splashed against the sender . Have a pressure test done on the coolant system and find the leaks . Remember to check inside in the heater core as well. Have a compression test done to check for head gasket and cracks

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Not circulating


While engine is cold remove radiator cap and start engine. If you have a water thermometer insert it so you will know when your at running temperature, sometimes a meat thermometer will work. At running temperature you should see the water circulating in the radiator. Remember that low water is the main reason for overheating. You should add anti-freeze or a 50/50 solution. Water should be about one inch above the coils. If water isn't low check the fan belt, or electric cooling fan, it should come on as soon as the car begins to over heat. Now check the hoses they may be soft and collapsing when hot. The water pump usually leaks out the bottom when it go's out or the shaft becomes wobbly (you'll need to loosen the fan belt to check this). If you have to pull the thermostat don't bother checking it in boiling water just replace it with a new gasket, and remember the coils on the thermostat always go's in the block or manifold. Check for oil in water this could mean a bad head gasket which will also cause overheating.

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1 Answer

Overheating


OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

Aug 04, 2011 | 1999 Oldsmobile Alero

1 Answer

I had a reconditioned steering box fitted recently and it has worked fine intil now. Only after a night of frost after starting the engine, the stering feels stiff, jerks a bit and then works fine. No...


I suggest flushing the system. Before doing that collect a 5ltr or 5gallon container of ATF formulated to operate at low temperatures....The problem could be water contamination in the fluid.... If this is so, the water may be freezing over night and forming ice....This can damage the pump and possibly the box too....
Keep in mind that the fluid will be pumped out from the system very quickly and therefore you should refill at the same rate....Never let the system run dry during this operation
  • Locate the return pipe (the low pressure pipe which connects to the reservoir from the steering box)
  • Disconnect from the reservoir and attach a tight fitting pipe to allow fluid to be drained into a separate container.
  • Have someone inside the vehicle to start and stop the engine
  • Start the engine and fill ATF into the steering reservoir as the fluid drains into the catchment container.
  • Flush until the fluid runs clean.
  • Stop the engine.
  • Refit the pipe.
  • Check for leakage.
  • You're done!
Best regards Johngee10

Nov 11, 2010 | Land Rover Discovery Cars & Trucks

1 Answer

Defroster blows cold air


It sounds like you have low coolant in the engine, If your coolant is low you may intermittently have no heat or have none at all. With a cold engine add about a pint of coolant above the full line, then warm the vehicle up to regular operating temperature and shut it off. As the engine cools the coolant from the resevoir should be drawn back into the engine. If after the engine cools the coolant level is lower than where you had filled it to, try this again. The reason for bringing the engine to operating temp is that as the coolant ciculates, if their are any air locks in the system they will be circulated out to the resevoir. If this doesn't work then you may have to change the thermostat. There is a chance that the water pump may not be performing up to snuff but then the engine would be overheating as well. If the coolant is low make sure you keep an eye on it as you may have a leak in the system.

Dec 04, 2009 | 2000 Dodge Neon

2 Answers

Thermostat?


It actually sounds to me like you're low on coolant. My Jeep leaks coolant and whenever it gets low the temp gauge will go real high and then drop, and the heater doesn't work well. This is because the cooling system of your car is supposed to be a closed system, full of coolant and no air. When coolant leaks out, the space it used to occupy is now occupied by air, which does not transfer heat well. When 'air' is passing through your cooling system, no heat can be transferred from your engine to the heater and radiator, resulting in a hot engine and no heat at the heater. Then when a pocket of water passes through the system, the temperature gauge quickly falls as the water absorbs the heat from the engine. The hot water that cools the engine is where the heater gets it's heat from as well, so when water passes through the heater core, the heater works, but when it's filled with air, it doesn't.

Hot water runs through the heater core regardless of whether or not your thermostat is open or closed. That's why your heater works in the winter even before the engine is at normal operating temperature. The fact that the heater stops working is a good sign that the thermostat is probably not the culprit.

As for the water pump. If the water pump was bad, your temp gauge would go into the red and stay there. Water pumps generally don't work intermittently. Either it's good and ot works, or it's bad and it doesn't.

However, if you are in fact low on water, as I suspect, it means you probably have a leak somewhere. The leak could be in the water pump housing gasket, so depending on where you take it for repairs, they may try to sell you a new water pump anyhow. So just beware of that.

Feb 12, 2009 | 2004 Chevrolet Blazer

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