Question about GMC Yukon

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I am replacing the original water pump and looking for the proper sequence in order to do this.

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  • psapilot44 Aug 28, 2010

    It's a 1997 w/ the 350 V8 and airconditioning

  • psapilot44 Aug 28, 2010

    OK, now that I have told you the engine/model we are working on; as I look at the engine from the front of the car, is the #1 cylinder on the front right or front left and how do I go about determining whether it's at TDC or not?


3 Answers

Click on the link below to view "step by step" information on how to replace your water pump. This information is the same for all GMC cars and trucks:

Posted on Aug 29, 2010

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It's a bit diffycult without knowing which engine you have or in fact which model. On transverse engine layout late model gmc's you would have to remove the timing belt and fan/serpentine belts to access the waterpump. Remember to place cylinder no 1 on top dead centre and take note of the timing belt markings before removing the belt.
For longitudinal applications the fan, fan cowling needs to be removed before you can get at the pump. After this the same cautionary rules apply as per the transverse engine.

Posted on Aug 28, 2010

  • Rene Rossouw
    Rene Rossouw Aug 30, 2010

    That makes things far easier. No need for moving the engine about. You will need to remove the top and bottom radiator hoses. (Removing the top hose is just to make access easier) Removing the hoses will cause a large amount of coolant to spill as it is impossible to catch all of it in a container so do this in a spot away from where you will be working.
    Loosen the locknut(facing front) on the top front of the alternator. Loosen the lower alternator bolt(No need to remove it. Just loosen) Slide the alternator towards the engine. The V-belt can now be removed.
    Remove the 2 hoses on the top of the pump. Undo the 4 bolts on the front of the water pump pulley and remove the pulley. You can now remove the 4 mounting bolts that hold the water pump to the block.
    Once removed clear any old gasket and/or sealant on the inlet ports on the block. You can use a sharp blade for this. Reinstall in the reverse of removal. Remember to use new gaskets. If you have difficulty removing a hose, grip it firmly on the part which goes over the pipe and twist it. This will break the rust bonding it and you can now remove the hose. Inspect old hoses and replace if cracks are visible. If you have difficulty in fitting a hose, soak the end in boiling water for a minute. You can use a small amount of dishwashing liquid on a pipe end to have the hose slide over easily. Remember to add antifreeze to any water you put in the cooling system when filling. Dilute it at least 50/50 water and antifreeze(More antifreeze for colder climates)


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Posted on Aug 27, 2010

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Cylinderhead torque settings

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Water pump went out order new one ,it look like imay halt todis assembl rhe right side of motor to even get it ,including my timing belt

That is correct. The timing belt must be removed to replace the water pump.

CAUTION: Your vehicle is equipped with an "interference engine", meaning that if the timing belt is not replaced properly, or if the engine is not timed correctly, or if for any reason the timing belt breaks or comes loose, SEVERE ENGINE DAMAGE CAN RESULT.

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How to replace the water pump

Water Pump
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.

2S-ELC Engines

  1. Drain the cooling system.
  2. Remove the timing belt as described in this section.
  3. Remove the alternator adjusting bar.
  4. Disconnect the lower radiator hose from the water inlet housing.

    Fig. 1: Exploded view of the water pump mounting

  5. Disconnect the water temperature switch from the water inlet housing.
  6. Disconnect the water by-pass hose from the water pump.
  7. Remove the two heater pipe clamp bolt. Remove the two nuts and heater pipe
    with gasket. Replace the gasket.
  8. Loosen the three water pump mounting bolts in the indicated sequence.

    Fig. 2: Water pump bolt loosening sequence for 2S-ELC and 3S-FE

  9. Remove the water pump and O-ring. If the water pump is stubborn, tap it a
    few times with a rubber mallet.
  10. Installation is the reverse of removal. Make sure all the water pump and
    engine contact surfaces are clean and install the new O-ring into the pump cover
  11. Install the water pump with the three bolts. Tighten the bolts in sequence
    to 82 inch lbs. (9 Nm).
  12. Fill the cooling system to the proper level with a good brand of ethylene
    glycol based coolant. Start the engine and inspect for leaks.

3S-FE Engines

  1. Drain the cooling system.
  2. Disconnect the water temperature switch connector from the water inlet
  3. Disconnect the lower radiator hose from the water inlet housing.
  4. Remove the timing belt and timing belt pulleys as described in this section.

  5. Remove the two nuts attaching the water by-pass pipe to the water pump
  6. Remove the three water pump-to-engine attaching bolts.
  7. Pull the water pump and the water pump cover out from the engine.
  8. Remove the two O-rings and gasket. Discard them and replace with new.
  9. Installation is the reverse of removal. Secure the water pump onto the
    engine and install the three bolts. Tighten the bolts in an alternate pattern to
    82 inch lbs. (9 Nm). Install the by-pass pipe attaching nuts and tighten them to
    82 inch lbs. (9 Nm) also.
  10. Fill the cooling system to the proper level with coolant.
  11. Start the engine and check for leaks.

5S-FE Engine

  1. Drain the engine coolant.
  2. Remove the timing belt.
  3. Remove the No. 1 idler pulley and tension spring. Remove the No. 2 idler
  4. Disconnect the lower radiator hose at the water inlet.
  5. Remove the alternator belt adjusting bar.
  6. Loosen the two nuts and disconnect the water by-pass pipe.
  7. Remove the three pump mounting bolts in sequence (middle, top, bottom) and
    then pull out the water pump and cover. Remove the gasket and two O-rings.

    Fig. 3: Bolt removal sequence for 5S-FE engines

    To install:

  8. Replace the two O-rings and gasket with new ones, coat the by-pass O-ring
    with soapy water and then connect the pump cover to the by-pass pipe. Do not
    install the nuts yet!
  9. With the pump loosely connected to the pipe, install the pump and tighten
    the three bolts to 82 inch lbs. (9 Nm), in sequence (top, bottom, middle).
    Install the two by-pass pipe nuts and tighten them to 78 inch lbs. (9 Nm).
  10. The remainder of installation is the reverse of removal. Tighten each
    component to specifications.

2VZ-FE and 3VZ-FE Engines

  1. Drain the engine coolant.
  2. Disconnect the lower radiator hose at the water inlet.
  3. Disconnect the timing belt from the water pump pulley.
  4. Remove the bolt holding the inlet pipe to the alternator belt adjusting bar
    and then remove the inlet pipe and O-ring.
  5. Remove the water inlet and thermostat.
  6. Remove the seven bolts and then pry off the water pump.
    To install:

  7. Scrape any remaining gasket material off the pump mating surface. Apply a
    0.08-0.12 inch (2-3mm) bead of sealant to the groove in the pump and then
    install the pump. Tighten the bolts to 14 ft. lbs. (20 Nm).

    Fig. 4: Apply sealant on the surface of the water pump as shown


  8. The remainder of installation is the reverse of removal. Tighten each
    component to specifications. Connect the radiator hose and fill the engine with

1MZ-FE Engine

  1. Drain the engine coolant.
  2. Remove the timing belt.
  3. Mark the left and right camshaft pulleys with a touch of paint. Using a
    spanner wrench, remove the bolts to the right and left camshaft pulleys.
    Separate the pulleys from the engine. Be sure not to mix up the pulleys.
  4. Remove the No. 2 idler pulley by removing the bolt.
  5. Disconnect the three clamps and engine wire from the rear timing belt cover.

  6. Remove the six bolts holding the No. 3 timing belt cover to the engine

    Fig. 5: Unbolt the No. 3 timing belt cover from the engine

  7. Remove the bolts and nuts to the extract the water pump.

    Fig. 6: Water pump mounting bolt and nut locations

  8. Raise the engine slightly and remove the water pump and the gasket from the

    Fig. 7: Pull the water pump from the engine and remove it from
    the vehicle

    Fig. 8: Always discard the old gasket

    To install:

  9. Check that the water pump turns smoothly. Also check the air hole for
    coolant leakage.
  10. Using a new gasket, apply liquid sealer to the gasket, water pump and engine
  11. Install the gasket and pump to the engine and install the four bolts and two
    nuts. Tighten the nuts and bolts to 53 inch lbs. (6 Nm).
  12. The remainder of installation is the reverse of removal. Tighten each
    component to specifications.

    • Rear timing belt cover - 74 inch lbs. (9 Nm).
    • No. 2 idler pulley - 32 ft. lbs. (43 Nm)

  13. Fill the engine coolant. Connect the negative battery cable to the battery
    and start the engine.
  14. Top off the engine coolant and check for leaks.

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Oct 31, 2010 | 1990 Toyota Camry

1 Answer

How to replace a waterpump on a 2001 olds alero 2.4 cam

Water pump is driven by timing chain idler and is mounted on the rear of the timing chain housing. Disconnect the neg. battery cable. Drain cooling system. Disconnect oxygen sensor connector.
Remove upper exhaust manifould heat sheild. Remove exhaust manifold brace. Remove lower exhaust manifold heat sheild. Loosen manifold to exhaust manifold spring loaded nuts. Remove radiator outlet pipe to water pump coverbolts. Disconnect exhaust pipe from manifold.
Pull down on the exhaust pipe to disconnect it from exhaust manifold bolts. Disconnect outlet pipe from oil pan and transaxle. If equipped with manual tranaxle, remove exhaust maifold brace. Leave lower radiator hose attached and pull down on radiator out look pipe to disengauge from water pump. Leave outlet pipe hanging.
Lower vehicle. Remove exhaustmanifold to cylinder head nuts. Remove exhaust manifold to cylinder head nuts. Remove manifould. Remove timing chain front cover. Remove timing chain tensioner. Remove bolts bolts securing water pump cover to cylinder block. Remove water pump to timing chain housing nuts. Remove water pump attaching nuts. Remove water pump and cover assembly. Separate componets as necessary.
If cover was separated from body during removal, join this componets with a new gasket and hand tighten bolts. Apply bearing grease to splines of water pump drive. Set body and assemble into position.
Install and hand tighten bolts securing cover to cylinder block. Install and hand tighten bolts securing cover to cylinder block. Installand hand tighten nuts securing body to timing chain housing. Lubracate outlet pipe "O" ring with antifreeze. (I use RTV) Connect outlet pipe. Install and hand tighten bolts. Tighten bolts and nuts to specification in the following sequence. I'll ad the torque spec. at the end but this is where if you tighten out of order something will break.
pump assembly to timing chain housing nuts.
pump cover to pump body bolts
pump cover to cylinder block bolts (Bottom Bolt First)
outlet pipe to cover bolts
To complete installation reverse removel procedure.
Torque specs are 19 in. or 26mm all except water pump cover bolts which are 124 in or 14Nm
I never torque the bolts just make sure there done in the right order.

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1 Answer

It works but it does not have any heat

1) Check to see that you have proper coolant level. 2) Verify water pump is working - if engine stays within temperature range you should be good. If engine is hot - replace water pump/thermostat. If engine is cold - replace thermostat. 3) With all of the above in proper order, the most likely and common problem is a blocked heater core - replace it.

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1 Answer

Poor heat after head replacement

i would go for the water pump, often people change the head gasket but remember,,, something usually makes this blow ie thermostat, dodgy water pump, blocked radiator ect,,,, but water pump would be my diagnostic

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2 Answers

1991 300zx water pump replacement procedure

Quickest and easiest way to get you the info is here - check this link:

This will walk you through the entire timing belt replacement procedure. Simply follow the disassembly until the water pump is off, and then reinstall everything in reverse order.

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