Question about 1994 Lexus LS 400

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Fan pulley bearing shot. can old one be pressed out and new one fitted

I thought the water pump bearing was rumbling, after removal fan belt pulley bearing found to be culprit. is it possible to press out the damaged bearing and re-fit a new one rather than pay $900.00 for a new part? if they cannot be pressed out, why not?

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  • ryan_m_j May 26, 2009

    thank you, i have access to a press so force isnt a prob, thanks for the warning, i will make sure it is 'glued' in well

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Sometimes it is possible but they are glued in really well so might take quite alot of effort. remember to use jb weld or equivalant when you put the new bearing back in if it comes out while you are driving it will cause extensive damage to your car.

Posted on May 25, 2009

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Replace water pump torrent


drain coolant until below water pump level. loosen water pump pulley bolts.then remove drive belt by rotating belt tensioner.remove drive belt from the right of idler pulley.carefully release the drive belt tensioner spring tension.then remove water pump pulley bolts and pulley.remove water pump bolts and water pump pay attention to the position old water pump when removing water pump so you can line up new water pump holes to the engine. be sure clean engine water pump mounting surface use gasket remover dont scratch engine surface when cleaning removing old gasket material. take new water pump gasket get it mounting holes line up with new water pump mounting holes.when done getting engine water pump surface clean.water pump gasket paper you need to put thin layer of sealer on both sides of water pump gasket use RTV SILICONE.LET SET UP 10 MINUTES. PUT GASKET ON WATER PUMP BUT FIRST MAKE SURE LINE UP GASKET HOLES WITH WATER PUMP HOLES BEFORE PUTTING ON THE GASKET SEALER.when gasket sealer set up 10 minutes then install new water pump with gasket to the engine torque to 89 inch lbs.or 10 NM that is about 7 ft lbs torque.you should be able turn water pump by hand if you cant turn water pump by hand got too tight damage water pump shaft bearing.when all done wait for THREE HOURS. before adding coolant i let RTV CURE SOME. torque water pump pulley bolts 18 ft lbs.

Dec 28, 2012 | 2006 Pontiac Torrent

1 Answer

Water pump going out how do i replace it


  • Removal of the Fan Shroud and Drive Belts
    • 1 Drain the cooling system. Place a waste oil collection pan underneath the petcock valve on the lower corner of the radiator. Open the petcock valve to drain the system.
    • 2 Remove the bolts that connect the fan shroud to the radiator core and remove the fan shroud.
    • 3 Loosen the alternator adjustment bolt and slide the alternator toward the engine. Remove the drive belt.
    • 4 Loosen the adjustment bolt for the air conditioning compressor, and slide the compressor toward the engine. Remove the drive belt.
    • 5 Loosen the adjustment bolt on the power steering pump and slide the pump toward the engine. Remove the drive belt.
  • Removal of the Water Pump
    • 1 Disconnect the bypass hose from the water pump by loosening the hose clamp and pulling the hose off the fitting.
    • 2 Remove the bolts that connect the water pump to the engine block, and remove the water pump and engine fan as an assembly.
    • 3 Remove the four retaining nuts that connect the fan assembly to the water pump. They will be located between the fluid coupling and the water pump pulley.
  • Installation of the Water Pump
    • 1 Attach the fan assembly to the new water pump by sliding the pulley then the fluid coupling onto the water pump and reinstalling the retaining nuts.
    • 2 Clean any old gasket material off the water pump mounting surface on the engine block.
    • 3 Place the new water pump gasket on the water pump mounting surface.
    • 4 Slide the new water pump into position and reinstall the mounting bolts.
    • 5 Reconnect the bypass hose by sliding the hose over the fitting and tightening the hose clamp.
  • Reinstalling the Drive Belts and Fan Shroud
    • 1 Reinstall the the drive belts for the power steering pump, air conditioning compressor and alternator. Tighten the adjusting bolts.
    • 2 Measure the deflection of each belt to make sure the belts are properly tightened. Measure deflection by placing a straight edge along the belt against the accessory pulley and the water pump pulley. Push down on the belt and measure the distance between the belt at the midpoint and the straight edge. It should be between 1/2 and 1/4 inch. Any more and the belt needs to be tightened. Loosen the adjustment and slide the accessory away from the engine to tighten.
    • 3 Drop the fan shroud into position and reinstall the bolts that secure it to the radiator.
    • 4 Close the petcock valve on the radiator and fill the cooling system with fresh coolant.
    • 5 Run the engine and visually inspect for leaks.



  • Dec 15, 2010 | 1992 Toyota Celica

    1 Answer

    Installing water pump in 97 cavalier 2.2


    Hi. Here's the proceudere on how to replace the water pump of your 97 Chevy Cavalier.


    •1
    Drain the cooling system. Place a large oil drain container under the drain fitting located on the bottom of the radiator. Turn the drain fitting counterclockwise until fluid is draining from the radiator. Use a pair of pliers to turn the drain fitting if you cannot turn it by hand. Turn the fitting clockwise to tighten it after all of the fluid has drained from the radiator.
    •2
    Remove the cooling fan. Disconnect the electrical connection from the fan motor. Remove the bolts holding the fan assembly to the radiator support with a ratchet wrench. Pull the fan assembly up from the engine compartment and remove it.
    •3
    Remove the serpentine belt. Place a wrench over the belt tensioner and rotate the tensioner to release the tension on the belt. Pull the belt off the pulleys and remove it from the vehicle.
    •4
    Remove the water pump pulley. Place a screwdriver behind the pulley to lock it in place while removing the pulley mounting bolts with a ratchet wrench.
    •5
    Disconnect the coolant hoses running to the water pump.
    •6
    Remove the water pump mounting bolts with a ratchet wrench or wrench and remove the water pump from the vehicle.
    •7
    Clean the mating surfaces of the engine block and new water pump with a towel saturated with lacquer thinner.
    •8
    Apply a thin layer of RTV sealer to both sides of the new water pump gasket and place the gasket on the new water pump.
    •9
    Place the water pump against the engine block and finger tighten the water pump mounting bolts to hold the pump in place. Tighten the bolts with a torque wrench to 18 foot-pounds.
    •10
    Place the pulley on the water pump and install the water pump pulley mounting bolts with a ratchet wrench.
    •11
    Attach any hoses previously disconnected from the water pump.
    •12
    Install the serpentine belt. Route the belt over the pulleys according to the routing diagram in the engine compartment. Place a wrench over the belt tensioner and rotate the tensioner to tighten the tension on the belt.
    •13
    Install the cooling fan. Gently lower the cooling fan in position and install the mounting bolts attaching the fan assembly to the radiator support with a ratchet wrench. Attach the electrical connection to the fan motor.
    •14
    Refill the cooling system to the appropriate level, start the vehicle and check for leaks around the water pump.

    All the best!

    Nov 10, 2010 | 1997 Chevrolet Cavalier

    1 Answer

    How difficult to change the water pump? Should I assume just releasing the fan belt, 4 bolts and it's off?


    found this from answers.com.....1. Depressurize and drain the cooling system. 2. Loosen the alterantor adjustment and remove the belt. 3. Remove the water pump pulley. 4. Remove all the timing belt covers. 5. Loosen the timing (camshaft) belt tensioner and slip the timing belt off the camshaft toothed pulley (ensure you do not move the positon of the camshaft) 6. Unbolt the lower radiator hose fitting and heater retrun pipe. 7. Unbolt the waterpump from the block (5 bolts). 8. Remove all traces of the old gasket before mounting the new pump (Permatex spray on gasket remover works well). 9. Install the new pump and reassemble in reverse order to above.

    Jul 28, 2010 | 1991 Mazda 323

    2 Answers

    Water pump bearing froze. Belt melted on road to


    GoeffreyH is not correct. On this engine the water pump is run by a small, single, separate belt which cannot be adjusted by the alternator because it (and the water pump itself) are on the opposite end of the engine from the crank pulley and other accessories, such as alternator, A/C, etc. which are driven by the main serpentine belt. The water pump is driven by a pulley on the end of one camshaft. Your confusion stems from the change from the old system, in which a longer belt was used with a tensioner in the traditional fashion, and the new system on 2004 vans where the tensioner was eliminated and a 'stretch fit' belt was used. Stretch fit belts have a springy component (like a rubber band) and keep their own tension this way by being stretched a bit to fit over the pulleys then holding snug against them. The problem is that some parts books erroneously call for the old belt for vans which need the new one. So the first belt your mechanic got was longer (to fit over the extra tensioner pulley) and static (not stretchy). On these newer vans, you can still see the mounting boss where the tensioner would have gone, it's part of the castings so it's still there. That's why it looks like there's a place for a tensioner but like none was ever there. Both your observations are correct. The only thing you need to do now is make sure your new belt is the right one, that it's a stretch fit belt, so it maintains tension (otherwise the water pump pulley will eventually start to slip and spin too slowly and the van will overheat) and also that it's not TOO tight, which will put you out of another water pump. The correct belt, if it's from NAPA, would be 030250SF.

    Jul 11, 2010 | 2004 Mazda MPV

    1 Answer

    2006 dodge dakota water pump replacement instructions 3.7L


    The water pump can be removed and installed without discharging the air conditioning system (if equipped).

    1. Disconnect battery negative cable.
    2. Drain cooling system. Refer to Draining and Filling found under Cooling System, Service and Repair.
    3. Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse. WARNING: CONSTANT TENSION HOSE CLAMPS ARE USED ON MOST COOLING SYSTEM HOSES. WHEN REMOVING OR INSTALLING, USE ONLY TOOLS DESIGNED FOR SERVICING THIS TYPE OF CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER 6094). SNAP-ON CLAMP TOOL (NUMBER HPC-20) MAY BE USED FOR LARGER CLAMPS. ALWAYS WEAR SAFETY GLASSES WHEN SERVICING CONSTANT TENSION CLAMPS. CAUTION: A number or letter is stamped into the tongue of constant tension clamps. If replacement is necessary, use only an original equipment clamp with matching number or letter.
    4. Remove upper radiator hose clamp and hose at radiator.
    5. The thermal viscous fan drive is attached (threaded) to the water pump hub shaft. Remove fan/viscous fan drive assembly from water pump by turning mounting nut counterclockwise as viewed from front. Threads on viscous fan drive are RIGHT HAND. A Snap-On 36 MM Fan Wrench (number SP346 from Snap-On Cummins Diesel Tool Set number 2017DSP) can be used. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating. Do not attempt to remove fan/viscous fan drive assembly from vehicle at this time.
    6. 6. If water pump is being replaced, do not unbolt fan blade assembly from thermal viscous fan drive.
    7. Remove fan shroud attaching hardware (two bolts at bottom-two clips at top).
    8. Remove fan shroud and fan blade/viscous fan drive assembly from vehicle as a complete unit.
    9. After removing fan blade/viscous fan drive assembly, do not place thermal viscous fan drive in horizontal position. If stored horizontally, silicone fluid in viscous fan drive could drain into its bearing assembly and contaminate lubricant.
    10. Do not remove water pump pulley bolts at this time.
    11. Remove accessory drive belt as follows: The drive belt is equipped with a spring loaded automatic tensioner. Relax tension from belt by rotating tensioner clockwise (as viewed from front). When all belt tension has been relaxed, remove accessory drive belt.
    12. 12. Remove four water pump pulley-to-water pump hub bolts and remove pulley from vehicle.
    13. Remove lower radiator hose clamp and remove lower hose at water pump.
    14. Remove heater hose clamp and heater hose from heater hose coolant return tube.
    15. Loosen heater hose coolant return tube mounting bolt and remove tube from water pump. Discard the old tube O-ring.
    16. Remove seven water pump mounting bolts.
    17. Loosen clamp at water pump end of bypass hose. Slip bypass hose from water pump while removing pump from vehicle. Discard old gasket. CAUTION: Do not pry water pump at timing chain case/cover. The machined surfaces may be damaged resulting in leaks.

    INSTALLATION

    1. Clean gasket mating surfaces.
    2. Using a new gasket, install water pump to engine as follows: Guide water pump nipple into bypass hose as pump is being installed. Install water pump bolts. Tighten water pump mounting bolts to 40 Nm (30 ft. lbs.) torque.
    3. Position bypass hose clamp to bypass hose.
    4. Spin water pump to be sure that pump impeller does not rub against timing chain case/cover.
    5. Install a new O-ring to the heater hose coolant return tube. Coat the new O-ring with antifreeze before installation.
    6. Install coolant return tube and its mounting bolt to engine. Be sure the slot in tube bracket is bottomed to mounting bolt. This will properly position return tube.
    7. Connect radiator lower hose to water pump.
    8. Connect heater hose and hose clamp to coolant return tube.
    9. Install water pump pulley. Tighten bolts to 27 Nm (20 ft. lbs.) torque. Place a bar or screwdriver between water pump pulley bolts to prevent pulley from rotating.
    10. Relax tension from belt tensioner. Install accessory drive belt.
    11. CAUTION: When installing the serpentine accessory drive belt, the belt must be routed correctly. If not, engine may overheat due to water pump rotating in wrong direction. Refer to Illustration above for correct belt routing. The correct belt with correct length must be used.
    12. Position fan shroud and fan blade/viscous fan drive assembly to vehicle as a complete unit.
    13. Install fan shroud.
    14. Install fan blade/viscous fan drive assembly to water pump shaft.
    15. Fill cooling system.
    16. Connect battery negative cable.
    17. Start and warm the engine. Check for leaks.

    Feb 28, 2010 | 2006 Dodge Dakota

    2 Answers

    Bearing has collapsed,fan is wobbling and unstable


    Yes you must remove the timing belt and gear to remove the water pump. I always recommend a new timing belt as part of the repair. Regards, Joe
    PS kindly rate my answer. Thank you.

    Jan 20, 2010 | 1991 Toyota Land Cruiser

    2 Answers

    How to replace a water pump on a 1995 bmw 318is


    1. Disconnect the negative battery cable. Drain the cooling system.
    2. Remove the distributor cap and rotor. Remove the rotor adapter, the dust shield and the distributor housing.
    3. Remove the fan. The fan must be held stationary with tool 11 5 030 or some sort of flat blade cut to fit over the hub and drilled to fit over 2 of the studs on the front of the pulley. Remove the fan coupling nut; left hand thread-turn clockwise to remove.
    4. Remove the belt and pulley.
    5. Remove the rubber guard and distributor and or upper timing belt cover.
    6. Compress the timing tensioner spring and clamp pin with the proper tool.

    Observe the installed position of the tensioner spring pin on the water pump housing for reinstallation purposes.
    1. Remove the water hoses, remove the 3 water pump bolts and remove the pump.

    To install:
    1. Clean the gasket surfaces and use a new gasket.
    2. Install the water pump in position. Note the position of the tensioner spring pin. Torque M8 bolts to 16-17 ft. lbs. (20-24 Nm) and M6 bolts to 6-7 ft. lbs. (8-10 Nm). Connect the hoses.
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    4. Install the fan, distributor housing and dust shield. Tighten the rotor adapter to 39-47 ft. lbs. (55-65 Nm). Install the rotor, O-ring and cap.
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    Dec 30, 2009 | BMW 318 Cars & Trucks

    3 Answers

    Water pump is howling


    The bearings are probably going out or needs a new pulley, either way you should replace the pump.

    Dec 20, 2009 | 1998 Jeep Wrangler

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    The fans in my 1983 nissan sentra just stopped.


    It is most likely a pulley that needs oiling or replacement. If fans are ran by a belt, the fan clutch may be stuck or pulley is seized.
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    May 31, 2009 | 1983 Nissan Sentra

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