Question about 1998 Pontiac Grand Am

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Thermostat replacement on 1998 Grand Am 2.4L engine

After removing the bolts for the radiator outlet pipe from the water pump, how do you get the outlet pipe out from under the engine to remove the old gasket? Secondly, how do you get the thermostat in the outlet pipe and replace this assembly back into the water pump?

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Posted on Jan 31, 2010

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SOURCE: when you replace thermostat where does the gasket

It should be a rubber ring that actualy stretches& goes around outside edge of thermostat.

Posted on Jun 07, 2010

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jsmes1027
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SOURCE: 2004 GTP Grand Prix overheating in slow traffic

Are the cooling fans coming on during normal operation? If your ac works turn it on and see if it overheats with ac on.If it does not overheat the fans are not operating properly under normal operating conditions.The ac will force the fans on. What you can do to start is just let the car idle in park and see if fans will come on normally. The coolant temp should reach 200-210 before the fans will come on. Make sure the air is off at this time. If we can verify the fans are working or not working properly we can go to the next step. Let me know what you find out.

Posted on Oct 08, 2010

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1 Answer

How to replace water pump on 1991 pontiac quad 4


2.3L Engine
  1. Disconnect the negative battery cable
  2. Detach the oxygen sensor connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for more complete coolant drain.
  4. Remove upper and lower exhaust manifold heat shields.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Break loose the manifold to exhaust pipe spring loaded bolts using a 13mm box wrench.
  7. Raise and safely support the vehicle. NOTE: It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  8. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt.
  9. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  10. Remove the radiator outlet pipe from the oil pan and transaxle. If equipped with a manual transaxle, remove the exhaust manifold brace. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump.
  11. Carefully lower the vehicle.
  12. Remove the exhaust manifold, seals and gaskets.
  13. Loosen and reposition the rear engine mount and bracket for clearance, as required.
  14. Remove the water pump mounting bolts and nuts. Remove the water pump and cover assembly, then separate the two pieces.

Feb 23, 2012 | 1991 Pontiac Grand Am

1 Answer

Diragram on how to change the water pump on a 1995 z24 cavalier 2.3


Check this procedure, according with the repair guide for...

2.3L and 2.4L Engines
(see Figure 9)
  1. Disconnect the negative battery cable
  2. Detach the oxygen sensor connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break loose the manifold to exhaust pipe spring loaded bolts using a 13mm box wrench.
  8. Raise and safely support the vehicle.
It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  1. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  2. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt.
On the 2.4L engines, DO NOT rotate the flex coupling more than 4° or damage may occur.Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  1. Remove the radiator outlet pipe from the oil pan and transaxle. If equipped with a manual transaxle, remove the exhaust manifold brace. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  2. Carefully lower the vehicle.
  3. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  4. For the 2.4L engine, remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  5. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces.

zjlimited_2033.jpg

Fig. 9: Water pump and cover mounting - 2.3L and 2.4L engines (click over image for zoom)

To install:

  1. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  2. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  3. Lubricate the radiator outlet pipe O-ring with antifreeze and slid the pipe onto the water pump cover. Install the bolts finger-tight.
  4. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts-19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly-106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first-19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover-125 inch lbs. (14 Nm).
  5. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  6. Raise and safely support the vehicle.
  7. Index the exhaust manifold bolts into the exhaust pipe flange.
  8. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  9. Connect the radiator outlet pipe to the transaxle and oil pan. Install the exhaust manifold brace, if removed.
  10. On the 2.4L engine, install the timing chain tensioner and front cover.
  11. Install the lower heat shield.
  12. Carefully lower the vehicle.
  13. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  14. Tighten the manifold-to-exhaust pipe nuts to specification.
  15. Install the upper heat shield.
  16. Attach the oxygen sensor connector.
  17. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  18. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine off.
  19. Once the vehicle has cooled, recheck the coolant level.

Hope helps; remember to rating this answer and leave a testimonial comment. Thank you for using FixYa.

Oct 13, 2011 | 1995 Chevrolet Cavalier

2 Answers

Where is thermostat on my 2005 chevy classic


Thermostat Removal & Installation 2.2L Engine 2004-2005 To Remove:
  1. Drain the cooling system. chevy_cav_02-04_tstat.gif
  2. Remove the thermostat housing-to-water pump feed pipe bolts. chevy_cav_02-04_feedpipe.gif
  3. Remove the water pump feed pipe from the thermostat housing .
  4. Remove the thermostat from the housing.
To Install:
  1. Install the thermostat on the housing.
  2. Install the water pump feed pipe on the thermostat housing with the mounting bolts. Tighten 89 in-lb (10 Nm).
  3. Fill the cooling system.
2006-2007 To Remove:
  1. Drain the cooling system.
  2. Disconnect the radiator outlet hose from the surge tank and thermostat housing cover. Thermostat & cover gm-03-39-3601.gif
  3. Remove the mounting bolts and remove the thermostat housing cover.
  4. Remove the thermostat from the housing. Discard the O-ring.
To Install:
  1. Using a new O-ring, install the thermostat on the housing.
  2. Install the thermostat housing cover with the mounting bolts. Tighten 89 in-lb (10 Nm).
  3. Connect the radiator outlet hose to the surge tank and thermostat housing cover.
  4. Fill the cooling system.
3.5L Engine (LZ4) W/ Variable Valve Timing & 3.9L Engine To Remove:
  1. Drain the cooling system.
  2. Remove the air cleaner outlet duct.
  3. Disconnect the radiator outlet hose from the thermostat housing. Thermostat 3.9L gm-03-00-3054.gif
  4. Remove the mounting bolt/stud and remove the thermostat housing.
  5. Remove the thermostat from the engine.
  6. Clean the sealing surfaces.
To Install:
  1. Using a new gasket, install the thermostat on the engine.
  2. Install the thermostat housing with the mounting bolts. Tighten 89 in-lb (10 Nm).
  3. Connect the radiator outlet hose to the thermostat housing.
  4. Install the air cleaner outlet duct.
  5. Fill the cooling system.
  6. Check the cooling system for leaks.
3.5L Engine (LX9) W/O Variable Valve Timing To Remove:
  1. Drain the coolant.
  2. Disconnect the radiator hose from the thermostat housing. Thermostat 3.5L gm_mv_ven_tstat.gif
  3. Remove the mounting bolt/stud and remove the thermostat housing.
  4. Remove the housing gasket.
  5. Remove the thermostat.
  6. Clean the mating surfaces.
To Install:
  1. Install the thermostat on the engine.
  2. Install the thermostat housing and gasket with the mounting bolts. Tighten 18 ft-lb (25 Nm).
  3. Connect the radiator hose to the thermostat housing.
  4. Fill the cooling system.
  5. Check the cooling system for leaks.

Jan 29, 2011 | 2005 Chevrolet Malibu

1 Answer

How do I replace a water pump on a 1999 malibou with a quad 4?


Water Pump REMOVAL & INSTALLATION CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old. 2.4L Engine
  1. Disconnect the negative battery cable
  2. Detach the Oxygen (O2) sensor electrical connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for a more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break the manifold-to-exhaust pipe spring loaded bolts loose using a 13mm box wrench.
  8. Raise and safely support the vehicle. NOTE: It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  9. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  10. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt. NOTE: DO NOT rotate the flex coupling more than 4°or damage may occur.
  11. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  12. Remove the radiator outlet pipe from the oil pan and transaxle. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  13. Carefully lower the vehicle.
  14. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  15. Remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  16. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces. Fig. 1: Water pump and cover mounting - 2.4L engine 87953070.gif
    To install:
  17. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  18. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  19. Lubricate the radiator outlet pipe O-ring with antifreeze and slide the pipe onto the water pump cover. Install the bolts finger-tight.
  20. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts:19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly: 106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first: 19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover: 125 inch lbs. (14 Nm).
  21. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  22. Raise and safely support the vehicle.
  23. Index the exhaust manifold bolts into the exhaust pipe flange.
  24. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  25. Connect the radiator outlet pipe to the transaxle and oil pan.
  26. Install the timing chain tensioner and front cover.
  27. Install the lower heat shield.
  28. Carefully lower the vehicle.
  29. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  30. Tighten the manifold-to-exhaust pipe nuts to specification.
  31. Install the upper heat shield.
  32. Attach the oxygen sensor connector.
  33. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  34. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine OFF.
  35. Once the vehicle has cooled, recheck the coolant level, then install the radiator cap.

Oct 26, 2010 | 1999 Chevrolet Malibu

2 Answers

How to replace water pump on 97 pontiac sunfire 2.4


PLEASE DON'T FORGET TO RATE! THANKS! 2.3L & 2.4L Engines
  1. Disconnect the negative battery cable
  2. Detach the oxygen sensor connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break loose the manifold to exhaust pipe spring loaded bolts using a 13mm box wrench.
  8. Raise and safely support the vehicle.
It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  1. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  2. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt.
On the 2.4L engines, DO NOT rotate the flex coupling more than 4° or damage may occur.
  1. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  2. Remove the radiator outlet pipe from the oil pan and transaxle. If equipped with a manual transaxle, remove the exhaust manifold brace. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  3. Carefully lower the vehicle.
  4. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  5. For the 2.4L engine, remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  6. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces.

01add58.gif
Water pump and cover mounting-2.3L and 2.4L engines

To install:
  1. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  2. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  3. Lubricate the radiator outlet pipe O-ring with antifreeze and slid the pipe onto the water pump cover. Install the bolts finger-tight.
  4. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts-19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly-106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first-19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover-125 inch lbs. (14 Nm).
  5. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  6. Raise and safely support the vehicle.
  7. Index the exhaust manifold bolts into the exhaust pipe flange.
  8. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  9. Connect the radiator outlet pipe to the transaxle and oil pan. Install the exhaust manifold brace, if removed.
  10. On the 2.4L engine, install the timing chain tensioner and front cover.
  11. Install the lower heat shield.
  12. Carefully lower the vehicle.
  13. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  14. Tighten the manifold-to-exhaust pipe nuts to specification.
  15. Install the upper heat shield.
  16. Attach the oxygen sensor connector.
  17. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  18. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine off.
  19. Once the vehicle has cooled, recheck the coolant level.

Sep 13, 2010 | Pontiac Sunfire Cars & Trucks

2 Answers

Where is the thermostat on a 2.2l ohc engine?


Removal & Installation 2.2L VIN 4 To Remove:
  1. Drain the cooling system.
  2. Remove the lower radiator hose from thermostat housing.
  3. Remove the thermostat housing bolts and outlet.
  4. Remove the thermostat.
  5. Clean the mating surfaces.
To Install:
  1. Install the thermostat.
  2. Install the thermostat housing and bolts.
  3. Install the coolant housing bolts. Tighten bolts to 14 Nm (10 ft. lbs.).
  4. Install the lower radiator hose to thermostat housing.
  5. Fill the cooling system.
  6. Inspect for leaks.
2.2L VIN F To Remove:
  1. Remove the exhaust manifold. If equipped with an automatic transmission.
  2. Drain the cooling system.
  3. Remove or disconnect the following: chevy_cav_02-04_tstat.gif

    • Thermostat housing to water pump feed pipe bolts. chevy_cav_02-04_feedpipe.gif

    • Thermostat housing to water pump feed pipe.
    • Thermostat.
To Install:
  1. Install or connect the following:
    • Thermostat.
    • Thermostat housing to water pump feed pipe.
    • Thermostat housing to water pump feed pipe bolt. Tighten bolt to 10 Nm (18 in. lbs.).
    • Exhaust manifold. If equipped with an automatic transmission.
  2. Fill the cooling system.
2.4L VIN T To Remove:
  1. Drain the cooling system.
  2. Remove the exhaust manifold heat shield bolts and shield. cavman.gif

    cavtstat.gif

  3. Remove the coolant inlet housing bolts.
  4. Lift vehicle.
  5. Remove the coolant inlet housing stud from the oil pan.
  6. Remove the wheel.
  7. Remove the right engine splash shield.
  8. Remove the transaxle-to-engine block brace bolts and brace.
  9. Remove the radiator outlet pipe.
  10. Remove the thermostat.
  11. Clean the mating surfaces.
To Install:
  1. Clean the mating surfaces.
  2. Install the thermostat.
  3. Install the radiator outlet pipe.
  4. Install the transaxle-to-engine block brace and install bolts.
  5. Install the right engine splash shield.
  6. Install the wheel.
  7. Lower the vehicle.
  8. Install the exhaust manifold heat shield and bolt.
  9. Tighten the exhaust manifold heat shield bolts to 14 Nm (10 ft. lbs.).
  10. Fill the cooling system.
  11. Inspect the system for leaks.
prev.gif next.gif

Sep 09, 2010 | 2003 Pontiac Sunfire

2 Answers

2004 thermostat where is it located on engine



2.2L (VIN 4) Engine

  1. Drain the cooling system.
  2. Remove the lower radiator hose from thermostat outlet.

    67ec47f.jpg
    Fig. Remove the thermostat outlet bolts and outlet
  3. Remove the thermostat outlet bolts and outlet.

    77bb8c2.jpg
    Fig. Remove the thermostat



2.2L (VIN F) Engine
  1. Remove the thermostat housing to water pump feed pipe bolts.
  2. Remove the thermostat housing to water pump feed pipe.


46ebede.jpg

Fig. Remove the thermostat


Hope helps (remember rated this),

Jun 25, 2010 | 1996 Chevrolet Cavalier

1 Answer

How to change the thermostat


Alero, Grand Am 1999-2005 Thermostat - Removal & Installation 2.2L Engine
  1. If equipped with an automatic transaxle, remove the exhaust manifold, as outlined in this section.
  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.

    d1db35e.jpg
    Fig. Thermostat mounting-2.2L engine
  5. Remove the thermostat.

To install:
  1. Install the thermostat.
  2. Install the thermostat housing to water pump feed pipe.
  3. Install the thermostat housing to water pump feed pipe bolt. Tighten the thermostat housing to water pump feed pipe bolt to 89 inch lbs. (10 Nm).
  4. If equipped with an automatic transaxle, install the exhaust manifold, as outlined in this section.
  5. Fill the cooling system.

3.1L Engines
  1. Disconnect the negative battery cable.
  2. Drain the cooling system to a level below the thermostat housing.
  3. Remove the air cleaner assembly.
  4. Disconnect the surge tank line from the thermostat housing.
  5. Remove thermostat housing-to-intake manifold attaching bolt and nut, then remove the housing.
  6. Remove the thermostat.

To install:
  1. Clean all gasket surfaces completely.
  2. Insert the thermostat in the intake manifold.
  3. Attach the thermostat housing to the intake manifold.
  4. Install the mounting bolt and nut. Tighten to 18 ft. lbs. (25 Nm).
  5. Install the air cleaner assembly.
  6. Connect the surge tank line to thermostat housing.
  7. Refill the cooling system.
  8. Connect the negative battery cable, remove the radiator cap, then start the engine. Allow the engine to run with radiator cap removed, until the upper radiator hose becomes hot (thermostat open). With the engine idling, add coolant to the radiator until the level is up to the bottom of the filler neck.
  9. Install the radiator cap, making sure the arrows line up with the overflow tube.

3.4L Engine
  1. Drain the cooling system.
  2. Remove the air cleaner.
  3. Remove exhaust crossover pipe.
  4. Disconnect the surge tank line fitting from the coolant outlet.
  5. Remove the thermostat housing to intake manifold bolts.
  6. Remove the thermostat housing outlet and thermostat
  7. Clean the mating surfaces.

To install:
  1. Install the thermostat and housing outlet.
  2. Install the thermostat housing bolts. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
  3. Install exhaust crossover pipe.
  4. Connect the surge tank line fitting to the coolant outlet. Tighten the fittings to 15 ft. lbs. (21 Nm).
  5. Install the air cleaner.
  6. Fill the cooling system.
  7. Inspect the system for leaks.
Hope this help (remember comment and rated this).

Apr 04, 2010 | 1999 Oldsmobile Alero

1 Answer

WHERE THE WATER PUMP IS LOCATED on a 2.3 liter 4 cylinder quad hoc


it is driven off the timing chain, here is how you replace it
2.3L And 2.4L OHC Engines
  • Disconnect the oxygen sensor harness connector
  • Raise the vehicle and support it securely on jackstands
  • Remove the exhaust manifold brace and loosen the exhaust manifold bolts
  • Remove the radiator outlet pipe assembly to the water pump housing bolts and separate the assembly from the engine
  • Remove the exhaust manifold pipe from the exhaust manifold
  • Remove the radiator outlet pipe from the oil pan.On manual transaxles cars remove the exhaust manifold brace and keep the radiator inlet hose attached to the assembly.Pull down on the radiator outlet pipe in order to disengage the pipe from the water pump while leaving the radiator outlet pipe hanging
  • Lower the car remove the brake booster vacuum hose from the camshaft housing also remove the exhaust manifold from the cylinder head
  • Remove the timing chain cover from the engine
  • Remove the timing chain tensioner
  • Remove the water pump cover bolts from the engine block and the timing chain housing
  • Remove the water pump bolts and separate the assembly from the housing


Dec 01, 2009 | 1994 Pontiac Grand Am

1 Answer

Replacing the water pump


2.4L Engine
  1. Disconnect the negative battery cable
  2. Detach the Oxygen (O2) sensor electrical connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for a more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break the manifold-to-exhaust pipe spring loaded bolts loose using a 13mm box wrench.
  8. Raise and safely support the vehicle.

NOTE It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  1. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  2. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt.

NOTE DO NOT rotate the flex coupling more than 4° or damage may occur.
  1. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  2. Remove the radiator outlet pipe from the oil pan and transaxle. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  3. Carefully lower the vehicle.
  4. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  5. Remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  6. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces.
87953070.gif Water pump and cover mounting—2.4L engine
Click to Enlarge
To install:
  1. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  2. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  3. Lubricate the radiator outlet pipe O-ring with antifreeze and slide the pipe onto the water pump cover. Install the bolts finger-tight.
  4. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts:19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly: 106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first: 19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover: 125 inch lbs. (14 Nm).
  5. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  6. Raise and safely support the vehicle.
  7. Index the exhaust manifold bolts into the exhaust pipe flange.
  8. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  9. Connect the radiator outlet pipe to the transaxle and oil pan.
  10. Install the timing chain tensioner and front cover.
  11. Install the lower heat shield.
  12. Carefully lower the vehicle.
  13. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  14. Tighten the manifold-to-exhaust pipe nuts to specification.
  15. Install the upper heat shield.
  16. Attach the oxygen sensor connector.
  17. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  18. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine OFF.
  19. Once the vehicle has cooled, recheck the coolant level, then install the radiator cap.

3.1L Engine
  1. Disconnect the negative battery cable.
  2. Properly drain the cooling system into a suitable container.
  3. Loosen, but do not remove, the water pump pulley bolts.
  4. Remove the serpentine belt.
  5. Unfasten the water pump pulley bolts, then remove the pulley.
  6. Remove the five water pump mounting bolts, then remove the water pump.
To install:
86883115.gif View of the water pump mounting and bolt tightening specifications—3.1L engine shown
Click to Enlarge
  1. Clean all the gasket surfaces completely.
  2. Apply a thin bead of sealer around the outside edge of the water pump along the gasket sealing area, then install the gasket onto the water pump.
  3. Position the water pump on the engine, then tighten the water pump mounting bolts to 89 inch lbs. (10 Nm).
  4. Install the water pump pulley and finger-tighten the pulley bolts.
  5. Install the serpentine belt.
  6. Tighten the water pump pulley bolts to 18 ft. lbs. (25 Nm).
  7. Fill the cooling system.
  8. Connect the negative battery cable, then start the engine. Let the engine run until it reaches normal operating temperature, then check for leaks and coolant level. Add coolant, if necessary, then turn the engine OFF.

Aug 20, 2009 | 1997 Chevrolet Malibu

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