### Water Pump

#### REMOVAL AND INSTALLATION

##### 1.6L (GA16DE) Engine

1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Remove the cylinder head front mounting bracket.
4. Loosen the water pump pulley bolts.
5. Remove the engine drive belts from the A/C compressor, power steering pump and alternator.
6. Remove the belt pulley from the water pump.
7. Disconnect electrical connectors and coolant hoses from the thermostat housing.
8. Unbolt and remove the water pump and thermostat housing from the engine.

   NOTE: Remove the thermostat housing with water pump assembly.

9. Remove the bolts that secure the thermostat housing to the water pump.
10. Remove all traces of gasket material from sealing surfaces.

    To install:

11. Apply a continuous bead of liquid sealer to the sealing surface of the thermostat housing. The sealant should be 0.079–0.118 in. (2–3mm) diameter.
12. Install the thermostat housing to the water pump and tighten mounting bolts to 56–73 inch lbs. (7–8 Nm).
13. Apply a continuous bead of liquid sealer to the sealing surface of the water pump. The sealant should be 0.079–0.118 in. (2–3mm) diameter.
14. Install the water pump on the engine and tighten mounting bolts to 56–73 inch lbs. (7–8 Nm).
15. Install the pulley to the water pump and tighten the mounting bolts to 56–73 inch lbs. (7–8 Nm).
16. Connect electrical connectors and coolant hoses to the thermostat housing.
17. Install and adjust the alternator, power steering and A/C compressor drive belts.
18. Refill the cooling system and connect the negative battery cable.
19. Start the engine, bleed the cooling system, warm the engine to full operating temperature, and check for leaks.
20. If necessary, refill the cooling system when the engine has cooled.

##### 2.0L (SR20DE) Engine

1. Disconnect the negative battery cable.
2. Drain the radiator coolant.
3. Remove the cylinder block drain plug located at the left front of the engine and drain coolant.
4. Loosen the water pump pulley bolts.
5. Remove the power steering pump, alternator and A/C compressor drive belts (if equipped).
6. Remove the water pump pulley.
7. Note positioning of power steering pump adjusting bracket and remove the power steering pump adjusting bracket from the water pump. If necessary, remove the power steering pump for access to bracket.

   NOTE: When removing the power steering pump, it is not necessary to disconnect the pressure hoses or drain the system. Position or tie the pump aside.

8. Support the engine and remove the front engine mount.
9. Remove the mounting bolts from the water pump and remove the water pump.
10. Remove all traces of liquid gasket material from sealing surfaces.

    To install:

11. Apply a continuous bead of liquid sealer to the mating surface of the water pump. Sealer should be 0.079–0.118 in. (2–3mm) wide.
12. Install the water pump assembly and tighten mounting bolts to 12–15 ft. lbs. (16–21 Nm).

    NOTE: Be sure to properly position the adjusting bracket that was noted during removal.

13. Install the front engine mount.
14. Install the power steering pump adjusting bracket and install the power steering pump if removed.
15. Install the water pump pulley and tighten mounting bolts to 55–73 inch lbs. (6–8 Nm).
16. Install and adjust the power steering pump, alternator and A/C compressor drive belts (if equipped).
17. Install the cylinder block drain plug located at the left front of the engine and tighten drain plug to 70–104 inch lbs. (8–12 Nm).
18. Refill the cooling system and connect the negative battery cable.
19. Start the engine, bleed the cooling system, and check for leaks.

##### 2.4L (KA24DE) Engine

###### Altima

1. Disconnect the negative battery cable.
2. Drain the cooling system and water pipe, using the drain plugs.
3. Remove the upper radiator hose to provide working room and remove the drive belt(s) from the pulleys.
4. Remove the alternator and the A/C compressor.

   NOTE: Do not disconnect the A/C compressor lines. Unbolt the compressor and lay it off to the side.

5. Remove the water pump pulley.
6. Remove the mounting bolts and remove the water pump from the engine.

   NOTE: The mounting bolts are different sizes and must be reinstalled in the correct location, therefore it is a good idea to arrange the bolts so that they can be easily identified during installation.

   To install:

7. Make sure all gasket surfaces are clean and properly apply a continuous bead of silicone sealer to the pump.
8. Install the pump to the engine and torque the 6mm bolts to 57–66 inch lbs. (6–8 Nm) and the 8mm bolts to 12–14 ft. lbs. (16–19 Nm).
9. Install the water pump pulley and torque the bolts to 57–66 inch lbs. (6–8 Nm).
10. Install the remaining components in the opposite order from which they were removed.
11. Fill and bleed the cooling system.
12. Start the engine and check for leaks.

###### 240SX

1. Disconnect the negative battery cable.
2. Drain the cooling system and the engine block, using the radiator petcock and cylinder block drain plug.
3. Remove the upper radiator hose to provide working room and remove the drive belt(s) from the pulleys.
4. Remove the retaining screws and lift the fan shroud from the engine.
5. While holding the pulley, remove the nuts retaining the cooling fan and pulley to the water pump.
6. Remove the mounting bolts and remove the water pump from the engine.

   To install:

7. Make sure all gasket surfaces are clean and properly apply liquid sealer to the pump.
8. Install the pump to the engine and torque the bolts to 12–14 ft. lbs. (16–19 Nm).
9. Install the remaining components in the reverse order of removal.
10. Tighten the fan clutch, fan, and pulley mounting nuts to 66 inch lbs. (8 Nm).
11. Start the engine and check for leaks.

##### 3.0L (VE30DE) Engine

1. Disconnect the negative battery cable.
2. Drain the cooling system to a level below the water pump.
3. Remove the drive belts from the front of the engine.
4. Remove the water pump pulley-to-water pump bolts.
5. Remove the water pump-to-engine bolts.
6. Remove the water pump from the engine. If the water pump has excessive end play or rough operation, replace it.

   To install:

7. Clean the gasket mounting surfaces and grooves.
8. Using liquid sealant, apply a continuous bead of it to the gasket mounting surfaces of the water pump.
9. Install the water pump and torque water pump-to-engine bolts to 12–15 ft. lbs. (16–21 Nm).
10. Install the remaining components in the opposite order from which they were removed.
11. Tighten the water pump pulley-to-water pump bolts to 5–6 ft. lbs. (6–8 Nm).
12. Start the engine, run to normal operating temperature and check for the correct coolant level and for leaks.

##### 3.0L (VG30E) Engine

1. Disconnect the negative battery cable.
2. Drain the cooling system through the cock at the bottom of the radiator and the drain plug, on the left side of the block, behind the alternator.
3. Remove the upper radiator hose and thermostat housing.
4. Loosen and remove the drive belt(s) from the water pump pulley.
5. If necessary, remove the drive belt tensioner.
6. Remove the water pump pulley.
7. Remove the timing belt cover.

   NOTE: Be careful to keep coolant off the timing belt.

8. Remove the water pump-to-engine bolts (noting different lengths) and remove the pump. If the water pump has excessive end-play or rough operation, replace it.

   To install:

9. Clean the gasket mounting surfaces. If originally equipped with a gasket, use a new gasket and coat the gasket with sealant. If not originally equipped with a gasket, use liquid silicone gasket applied in an even bead around the mounting surfaces.
10. Reinstall the pump and torque the water pump-to-engine bolts evenly to 12–15 ft. lbs. (16–21 Nm).
11. The remaining components are installed in the reverse order from which they were removed.
12. Start the engine, run to normal operating temperature and check for the correct coolant level and for leaks.

##### 3.0L (VQ30DE) Engine

Fig. 1: Water pump and timing cover assembly — 3.0L (VQ30DE) engine

1. Disconnect the negative battery cable.
2. Drain the coolant from the plugs on the radiator and both sides of the engine block.
3. Position a jack under the oil pan for support. Be sure to place a block of wood on the jack for protection to the engine parts.
4. Remove the right side engine mount and engine mounting bracket.
5. Remove the drive belts and the idler pulley bracket.
6. Remove the chain tensioner cover and the water pump cover.
7. Push the timing chain tensioner sleeve and apply a stopper pin so it does not return.
8. Remove the timing chain tensioner assembly.
9. Remove the three bolts that secure the water pump.
10. Rotate the crankshaft 20 degrees counterclockwise to provide timing chain slack.
11. Put M8 bolts to two M8 threaded holes of the water pump.
12. Tighten each bolt by turning alternately 1⁄2 turn until they reach the timing chain rear case. Be sure to turn each bolt 1⁄2 turn at a time to prevent damage.
13. Lift up the water pump and remove it.
14. When removing the water pump, do not allow the water pump gear to hit the timing chain.
15. Remove and discard the O-rings from the water pump.
16. Clean all traces of liquid gasket from the water pump and covers.

    To install:

17. Using new O-rings, install the water pump to the engine block.
18. Tighten the three water pump mounting bolts evenly to 62–86 inch lbs. (7–10 Nm).
19. Rotate the crankshaft pulley to its original position by turning it 20 degrees clockwise.
20. Install the timing chain tensioner and tighten the mounting bolts to 75–96 inch lbs. (9–10 Nm).
21. Remove the stopper pin from the timing chain tensioner.
22. Apply a continuous 0.091–0.130 inch (2.3–3.3mm) bead of liquid sealant to the mating surfaces of the timing chain tensioner and water pump covers.
23. Install the timing chain tensioner and water pump covers to the engine block. Tighten the cover mounting bolts to 84–108 inch lbs. (10–13 Nm).
24. Install the drive belts and the idler pulley bracket.
25. Install the right side engine mounting bracket and the engine mount.
26. Remove the jack from under the engine and install the drain plugs to the cylinder block.
27. Connect the negative battery cable and refill the cooling system.
28. Start the engine, bleed the cooling system, and check for leaks.

##### 3.0L (VG30DETT and VG30DE) Engines

1. Disconnect negative battery cable.
2. Drain coolant from radiator and engine block.
3. Remove the undercover and the radiator.
4. Remove cooling fan assembly, water inlet, outlet and drive belts.
5. Remove crankshaft pulley and timing belt cover.
6. Remove water pump.

   To install:

7. Remove all traces of gasket material.
8. Apply a continuous bead of liquid gasket to water pump mating surface.
9. Install water pump to engine block.
10. Torque water pump bolts to 12–15 ft. lbs. (16–21 Nm).
11. Reinstall timing belt cover and tighten the cover bolts to 26–43 inch lbs. (3–5 Nm).
12. Replace crankshaft pulley and tighten the mounting bolt to 159–174 ft. lbs. (216–235 Nm).
13. Reinstall the drive belts, water inlet, water outlet, and cooling fan assembly.
14. Torque cooling fan nuts to 51–86 inch lbs. (6–10 Nm).
15. Reinstall the radiator and undercover.
16. Refill and bleed the cooling system.
17. Reconnect the negative battery cable
18. Start engine and check for proper operation.