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1994 Altima Water Pump Removal (bottom bolt hard to reach)
I'm trying to remove the water pump on a 1994 Nissan Altima. I have removed all of the bolts on the water pump except one. I can't reach it with a wrench or socket. The bolt is below the water pump pulley. Can anyone tell me if I need a special tool or if there is a secrect for reaching the bolt easier?
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Just did this over the weekend with my 2001 Nissan Altima. First, remove the negative battery cable to prevent shorting. Drain the radiator by removing the drain screw. To gain access to the water pump, I had to remove the upper radiator hose to the engine, unattach the reserve tank hose from the radiator and take out the reserve tank, remove the alternator and the lower alternator bracket because it blocks access to one of the water pump bolts and move the serpentine belt out of the way. This should give you free access to the six bolts that attach the water pump. You will probably have to hit the water pump with a rubber mallet or some other tool to break the sealant on the water pump, but it should then just come off. The hardest part of the job for me was removing the bolts for the alternator bracket because they were on extremely tight. Reinstall your new water pump after applying sealant to all parts that will attach to the bracket, and your ready to put it all back together. If you have the right tools, this should take probably 4 or 5 hours to complete.
CAUTION
Never open, service or drain the radiator or cooling system when
hot; serious burns can occur from the steam and hot coolant.
Drain the engine cooling system.
Raise and safely support the vehicle.
Remove the lower radiator hose from the water pump.
If the lower radiator hose is hard to reach on the back of the water
pump, remove the hose at the radiator and after the water pump is ready
to be removed, pull the water pump away from the engine block until
there is enough room to remove the hose from the pump.
Lower the vehicle.
Remove the accessory drive belt.
Remove the timing belt covers and the timing belt as outlined in
this Section.
Remove the four water pump retaining bolts.
Remove the water pump.
To install:
Thoroughly clean all sealing surfaces.
Install a new water pump gasket and the water pump onto the
cylinder block.
Tighten the retaining bolts to 12-15 ft. lbs. (16-20 Nm).
Reinstall the timing belt and the timing belt covers as outlined
in this Section.
Reinstall the accessory drive belt.
Raise and safely support the vehicle.
Reinstall the lower radiator hose.
Lower the vehicle.
Fill the engine cooling system.
Reconnect the negative battery cable.
Start the engine and top off the coolant as necessary. Check for
leaks.
2.5L Engine
Before continuing with this procedure, be sure three new water pump
retaining bolts (W701544) are available. Due to their torque-to-yield
design, the bolts stretch and cannot be reused.
Disconnect the negative battery cable.
CAUTION
Never open, service or drain the radiator or cooling system when
hot; serious burns can occur from the steam and hot coolant.
Drain the engine cooling system.
Remove the water pump pulley shield.
Remove the water pump drive belt.
Remove the water pump inlet and outlet hoses from the water pump.
Remove the three water pump to left cylinder head retaining bolts.
Remove the water pump and water pump housing from the vehicle.
Remove the water pump to water pump housing retaining bolts and
separate the water pump from the water pump housing.
To install:
Thoroughly clean all sealing surfaces.
Install the water pump to the water pump housing using a new
gasket and install the retaining bolts. Tighten the retaining bolts to
16-18 ft. lbs. (22-25 Nm).
Position the water pump and water pump housing and install three
new torque-to-yield retaining bolts into the left cylinder head.
Tighten the new retaining bolts to 11-13 ft. lbs. (15-18 Nm), then
rotate the retaining bolts 85-95 degrees.
Reinstall the water pump inlet and outlet hoses to the water pump.
Reinstall the water pump drive belt.
Reinstall the water pump shield.
Fill the engine cooling system.
Reconnect the negative battery cable.
Start the engine and top off the coolant as necessary. Check for
leaks.
Removal 1. Support the vehicle on jack stands. 2. Disconnect the negative battery cable. 3. Drain the cooling system. 4. Remove water pump drive belt. 5. Disconnect the coolant hoses at the water pump. 6. Remove the water pump pulley bolts (long bolt removed through the access hole provided in the body side rail), then remove the pulley. 7. Remove the torque axis mount. See TORQUE AXIS ENGINE MOUNT . 8. Remove the water pump attaching bolts and pump. 9. Clean all gasket mating surfaces.
Installation 1. Using a new gasket, install the water pump on the engine. Tighten the bolts to specifications. See TORQUE SPECIFICATIONS . 2. Install the torque axis mount. See TORQUE AXIS ENGINE MOUNT . 3. Install the water pump pulley, then tighten the bolts to specifications. See TORQUE SPECIFICATIONS . 4. Connect the coolant hoses onto the pump. 5. Install the water pump drive belt. 6. Fill the cooling system. 7. Add coolant supplement tablets. 8. Connect the battery cable, then start the engine. 9. Inspect for coolant leaks.
Use tools quater inch socket set, remove all belts, use size 10 socket. loosen all bolts and one nut, remove at bottom, put new gasket and refitt new pump. replace all belts and refill water with antifreeze 40% and water 60%. Marco 0736775896
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