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Replacing water pump 2000 Alero and replacing thermostat

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Posted on Jan 02, 2017



  • 362 Answers

SOURCE: need to replace the water pump on a 2000 oldsmobile alero 4cyl

If you have the 3.4L engine, easy, if you have the 2.4L HARD! Best left to a professional.

Posted on Feb 09, 2009


Joseph Weisenberger

  • 224 Answers

SOURCE: need to replace thermostat 2000 taurus

If it's the 3.0L Vulcan Engine (OHV), the thermostat is on the driver's side of the vehicle. Follow the upper radiator hose back to a metal area with three 10mm bolts. This is the thermostat housing. Undo the bolts, and there's the thermostat. Mark the back of it with the old thermostat in it (if you get one with a jiggle valve, it'll make it easier to put the new one in because the jiggle valve needs to be on top). The thermostat and housing aren't perfectly round, so you'll have to play with it a little to get it to line up. Make sure to change the gasket. The spring side of the thermostat goes into the engine.

The water pump is in the serpentine assembly. It's the larger pulley located toward the firewall. It'll be easiest to remove the water pump if you also remove the coolant recovery tank. The water pump pulley has four 1/2" bolts that you need to take out WITH THE BELT STILL ATTACHED. I can't stress this enough. The belt will keep the pulley in place so that you can remove the bolts. Take the pulley off, then the belt. Remove the heater hose at the top and the radiator hose at the bottom. There are 12 bolts of two diameters (1/2" and 10mm if I'm not mistaken). Tap the heater hose lightly with a soft-faced mallet to break the seal with the gasket. Trash the old gasket. Replace gasket (you can also line the mating surface of the water pump with RTV Sealant, put the new gasket on the new pump, and line the other side of gasket with a second coat of RTV sealant if you want a really good seal). Install the water pump and torque to manufacturer's specs. Attach the pulley to the water pump hand tight and put the belt back on. Tighten the pulley bolts. Put the coolant recovery tank back in place. Fill with coolant, start engine, bleed and check for leaks.

To bleed cooling system: Idle the engine until the thermostat opens (you'll be able to tell bacause the upper radiator hose will be uber hot and you'll feel coolant running through this hose). Squeeze all hoses in the system that you can reach, but don't burn yourself. Stop the engine and let it cool. Open the radiator cap and squeeze the COLD upper radiator hose. You'll see some bubbles in your recovery tank. You might have to monitor your coolant level for a couple of days while the final bits of air are purged through your radiator cap (that's why it's pressurized).

Hope this helps. It's not hard, but it took me quite awhile.

Posted on Jun 27, 2009


Victor Arauz

  • 466 Answers

SOURCE: Is it necessary to remove the thermostat housing

in the upper radiator hose to the engine side of an elbow with 2 screws in there is the thermostat and water pump need to remove the fan belt clucht with the fan off the bottom hose that goes from the radiator to the pump to remove the screws remove the pump the pump clean the surface and install the new pump

Posted on Aug 07, 2009

SOURCE: 1999 Alero: I replace the head gaskets thermostat water pump n...

OK you have done the engine side of things. If you have an electric radiator cooling fan make sure it comes on when radiator is hot, if not the fan motor is caned or the thermostat switch is faulty. Sometimes the fan motor is supplied by a fused/relayed circuit in which case these items will also need to be checked. Check that not only does the top hose from the engine to radiator get hot but that the bottom one does too. If not this would indicate a blockage perhaps in the radiator core due to sludge. If full of sludge give both ends a flush out with a high pressure hose. Like wise do the same with the bottom hose back to the pump. If the water is circulating and the radiator fan is working then the normal cooling system is working as it should. f the engine is running hot one last thing is to find the EGR valve and check that it is opening as it should. If not the combustion temperatures go very high. One indicator of a hot engine is blue/glazed spark plugs so take one out and check it for signs of hot running. If hot then look to clean the EGR valve and associated exhaust gas feeder pipe with frayed cable, cloth and and carb cleaner spray.

Posted on May 05, 2010


  • 4088 Answers

SOURCE: 2000 chevy silverado 5.3 replaced the thermostat

Blow out the radiator core from the engine side with compressed air to get rid of bugs and other debris. Check the fan clutch if mechanical drive. If electric fan, make sure fan(s) come on when hot. You may have combustion products entering the cooling system. Check with auto parts supplier for test kit for same or check with a well equipped shop for a similar test. Make sure that both radiator hoses are not obstructed internally. Hope some of this helps!

Posted on Jun 10, 2010

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1 Answer

2.2l. What exactly holds the thermostat in the engine block?

If you have an automatic transaxle, remove the exhaust manifold. Next, drain the cooling system. Remove the thermostat housing to water pump.
Remove the thermostat housing to water pump feed pipe. Finally, remove the t-stat. Reverse the process to replace.

Here is a picture of the item discussed. Check to make sure the maniflod needs removed to access it prior to removing it.

Nov 12, 2015 | 2000 Oldsmobile Alero

1 Answer

Water bubbling out overflow

Did you bleed the air out of the cooling system?? This is a must or it will overheat.

Mar 20, 2014 | Oldsmobile Alero Cars & Trucks

1 Answer

Where is the thermostat in a oldsmoble alero?

3.4L Engine
  1. Remove the thermostat housing to intake manifold bolts.
  2. Remove the thermostat housing outlet and thermostat

3.1L Engine
  1. Remove thermostat housing-to-intake manifold attaching bolt and nut, then remove the housing.
  2. Remove the thermostat.

2.2L Engine
  1. Remove the thermostat housing to water pump feed pipe bolts.
  2. Remove the thermostat housing to water pump feed pipe.
  3. Remove the thermostat.

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Nov 02, 2011 | 2000 Oldsmobile Alero

1 Answer

Hi - 2000 alero temp gague it maxing out at hot then it drops - but car is not smoking ? I filled it w water instead of coolant to top it off - I dont see any fluids leaking - now there seems to be a...

if the system was low it may have air trapped. look for a bleeder screw around the thermostat bleeder with engine running until all air is out.
on some modles there is a 2nd bleeder around water pump area

Jun 13, 2011 | 2000 Oldsmobile Alero

1 Answer

Coolant leaking thermostat problems

Try looking at all the hoses...AND Water should be able to see and verify the leak...hoses etc...the Water Pump is not expensive on your Alero...($35.) Yes, change thermostat at time of coolant drain for Water Pump as needed...:) Hope this helps.

Jan 03, 2011 | 2001 Oldsmobile Alero

1 Answer

How much will it cost to have my water pump replaced in my 2000 Alero. I am getting a quote of over $1,000.00 dollars because of the position the water pump is placed.

Your 2000 Olds Alero should have the 3400 V-6 engine...the water pump sells for about $45. The change out does not require the removal of any major components...(ie engine mounts etc.) You can loosen the serpentine belt to gain full access to the water pump bolts...Yes you will lose some anti-freeze and need to refill after replacing the pump...antifreeze $8.50 per gallon...recommend you use antifreeze "Good for All Models" as it has proven to be the best for longevity...Hope this helps...Your estimate is way to high...A shop will mark up the part slightly, and charge for labor...This job should be completed in less than 1 labor hour...$55. to $75. per hour depending on your location...PLEASE shop around if you cannot do this one by yourself:)

Dec 20, 2010 | 2000 Oldsmobile Alero

2 Answers


Hi there camcam,

Ok, first off the cooling system has to be full and circulating for the heater to work. When we get the rest of it solved, the heater will take care of itself.

Now the overheat problem. We need to determine if the engine is overheating because of lack of coolant or the lack of coolant is because of the overheating (Boiling off).

If you have to put in any significant amount of water on a regular basis, it has to be going somewhere. If there is a pool of coolant forming under the car, there's a leak. You need to locate it and act according to where you find it.

  • Radiator - weld or replace
  • Hoses - replace
  • Water pump - replace (check fan if attached, for balance)
The thermostat is a temperature triggered valve that periodically routes coolant circulation through the radiator. This allows hot water from the engine to be exchanged with cool water from the radiator.

A malfunctioning thermostat doesn't allow the heat exchange process, the engine overheats, coolant turns to steam....

Although rarer, the same result occurs if the water pump does not circulate coolant. When a water pump fails, it's usually leaking through a shaft seal.

So, if you don't find a leak, the thermostat is the first (and least expensive) thing to address.

I hope you find this to be instrumental in solving your problem.

Best regards

Apr 06, 2010 | 1999 Oldsmobile Alero

1 Answer

Car is over heating. Alero 2001

If you changed the hoses and thermostat and the car is still overheating, then the next thing to look at is the water pump. See if the water pump is leaking water from a vent hole. If it is, then the water pump is defective and will need to be replaced. Sure hope this helped.

Jul 20, 2009 | 2001 Oldsmobile Alero

2 Answers

Cant figure out how to change the thermostat on my 2003 Olds Alero.

  1. (This is for a 2.2L engine) If equipped with an automatic transmission, remove the exhaust manifold.
  2. Drain the cooling system.
  3. Remove the thermostat housing to water pump feed pipe bolts.
  4. Remove the thermostat housing to water pump feed pipe.
  5. Remove the thermostat.

Jun 24, 2009 | 2003 Oldsmobile Alero

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