1995 Altima 2.4L How to reassemble water pump to the water pump body(or water pump cover or water pump housing ) to engine block.

Question edited for clarity.
Question moved to model category.

Tech Feature: Cooling System and Water Pump ...

Underhood Service https://www.underhoodservice.com > tech-feature-coo...
Here's the factory procedure for replacing the water pump on a late-model 3.5L Altima or Maxima: 1. Drain the coolant out of the cooling system by opening ...

Nissan Altima Water Pump Replacement Cost Estimate

RepairPal https://repairpal.com > estimator > water-pump-replace...
The average cost for a Nissan Altima Water Pump Replacement is between $519 and $585. · Labor costs are estimated between $154 and $195 while parts are priced ...

Remove air box & air tube loosen throttle body 2 clamps disconnect Hoses on pump area remove rear cover 4 10mm bolts from rear of pump disconnect two bolts on housing bottom then 4 bolts on center housing two more are on lower rear between eng & tranny the other two are front lower 8 total remove nut fuel line clamp disconnect Wiring move housing out pump area 2-3 inch disconnect tensioner & remove water pump 5 x 10 mm bolts install new pump & reassemble good look 2-3 hours

This is found on the autozone.com website.

2.5L Engine
See Figures 3 through 7

1. Disconnect the negative battery cable.
2. Place a large drain pan under the radiator drain plug. Drain and properly contain the engine coolant.

This procedure requires removing the engine timing belt and the auto tensioner. To help assure proper alignment at assembly, it may be helpful to set the engine at TDC on No. 1 compression stroke. This should align all timing marks on the crankshaft sprocket and both camshaft sprockets.

1. Remove the accessory drive belts and crankshaft damper.
2. Remove the right engine mount. This requires safely supporting the engine with a floor jack and wood block so the mount can be removed.
3. Remove the timing belt covers.
4. Remove the timing belt and tensioner.

Fig. Fig. 3: Remove the water pump mounting bolts

Fig. Fig. 4: Pull the water pump assembly off of the engine and inlet pipe

Fig. Fig. 5: Open the water pump housing and examine for cracks or damage

Fig. Fig. 6: Replace the water pump housing gasket using a scraper tool

Fig. Fig. 7: Always keep the water pump's mounting bolts lined up with their correct mounting holes

1. Remove the water pump mounting bolts.
2. Separate the water pump from the water inlet pipe and remove the pump.

To install:

1. Thoroughly clean all sealing surfaces. Inspect the pump for damage or cracks, signs of coolant leakage at the vent, and excessive looseness or rough turning bearings. Any problems require a new pump.
2. Install a new O-ring on the water inlet pipe. Wet the O-ring with water to make installation easier. DO NOT use oil or grease on the O-ring.
3. Install a new gasket on the water pump and fit the pump inlet opening over the water pipe. Press the assembly together to force the pipe into the water pump.
4. Install the water pump-to-engine bolts and tighten to 20 ft. lbs. (27 Nm).
5. Install the timing belt and timing belt tensioner. Set the timing belt tension.
6. Install the timing belt covers. Install the right engine mount. Remove the floor jack and engine block from underneath the engine.
7. Install the crankshaft damper.
8. Install the accessory drive belts and set to the proper tension.
9. Connect the negative battery cable.
10. Fill and bleed the engine cooling system.
11. Start the engine and verify proper operation, with no leaks

See the instrucitons below.

Removal

1. Disconnect battery ground cable (14301) at battery.

1. Drain cooling system.

1. Loosen four water pump pulley retaining bolts while drive belt is still tight.

1. Loosen drive belt tensioner (6B209) and remove drive belt (8620) .

1. Remove generator (GEN) (10300) wiring connector, remove fasteners, and remove generator .

1. Remove heater water return hose from water pump (8501) .

1. Remove drive belt idler pulley and bolt tensioner assembly.

1. CAUTION: If using a prying device to assist in water pump removal, be careful not to damage the mating surfaces.
   Remove water pump pulley fasteners and gently pry between drive belt idler boss and frame rail and remove pulley.

1. NOTE: Mark bolts so they may be returned to original location.
   Remove water pump retaining bolts and nuts and water pump . Discard used water pump housing gasket (8507) .

Installation
NOTE: Lightly oil all bolt and stud bolt threads before installation except those specifying special sealant.

1. CAUTION: Use care when scraping gasket surfaces as aluminum gouges easily and can cause leaks.
   Clean gasket surfaces on water pump and engine front cover (6019) .

1. NOTE: The threads of the No. 3 engine front cover retaining stud must be coated with Pipe Sealant with Teflon® D8AZ-19554-A or equivalent meeting Ford specifications ESG-M4G194-A and ESR-M18P7-A before installing.
   NOTE: Gasket and Trim Adhesive D7AZ-19B508-B or equivalent meeting Ford specifications ESR-M11P17-A and ESE-M2G52-A is recommended to hold the water pump housing gasket in position.
   Position a new water pump housing gasket on water pump housing sealing surface.

1. Install water pump on the engine front cover . Install retaining bolts.
   
   
   
   
   Item Part Number Description 1 6019 Engine Front Cover 2 8507 Water Pump Housing Gasket 3 8501 Water Pump 4 - Bolt (Part of 8501) (5 Req'd) 5 - Optional Locating Pins (2)
   (Part of 6019) A - Tighten to 8-12 Nm
   (6-9 Lb-Ft)
   
   
   
   
   
   FASTENER IDENTIFICATION Fastener and Hole No. Part No. Size Application 1 N804811 M8 x 1.25 x 73 W/P & F/C to Block 2 N804811 M8 x 1.25 x 73 W/P & F/C to Block 3 - Stud N807036 M8 x 1.25 x 94.3 W/P & F/C to Block 4 N804811 M8 x 1.25 x 73 W/P & F/C to Block 5 N804811 M8 x 1.25 x 73 W/P & F/C to Block 6 N804811 M8 x 1.25 x 73 W/P & F/C to Block 7 N804576 M6 x 1 x 28.5 W/P to F/C 8 N804576 M6 x 1 x 28.5 W/P to F/C 9 N804576 M6 x 1 x 28.5 W/P to F/C 10 N804576 M6 x 1 x 28.5 W/P to F/C 11 N804576 M6 x 1 x 28.5 W/P to F/C A. Tighten to 20-30 Nm (15-22 Lb-Ft)
   B. Tighten to 8-12 Nm (71-106 Lb-In)
   
   

1. CAUTION: Be sure that the hose clamps are beyond the bead and placed in the center of the clamping surface of the connection. Any used hose clamps must be replaced with a new clamp to ensure proper sealing at the connection.
   Connect heater water outlet tube (18663) to water pump and position the hose clamps between the alignment marks on both ends of the hose. Slide hose on connections. Tighten screw clamps to 2.2-3.4 Nm (20-30 lb-in).

1. NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
   Connect battery ground cable .

1. Install idler pulley, drive belt tensioner, generator and generator wiring.

1. Position drive belt over drive belt tensioner and release drive belt tensioner .

1. Fill and bleed cooling system with specified coolant.

1. Fill power steering pump reservoir with specified fluid.

1. Start engine and check for coolant leaks.

Hope this helps.

Zeppelinx12

You need to drain radiator, remove fan assembly, belt(s) and pulley then unbolt pump from the block. Make sure you have gasket sealer when you purchase waterpump for reassembly.

REPLACE WATER PUMP ON A 1999 OLDSMOBILE ALERO. FIRST YOU HAVE TO DRAIN COOLANT SYSTEM IN A LARGE DRAIN. RADIATOR DRAIN PLUG SHOULD BE ON THE BOTTOM ON PASSENGER SIDE. THEN RAISE THE VECHICLE SUPPORT VECHICLE WITH JACKSTANDS. REMOVE THE EXHAUST MANIFOLD FROM THE ENGINE. CAUTION DO NOT ROTATE THE FLEX COUPLING ON THE FRONT EXHAUST PIPE MORE THAN 4 DEGREE OR DAMAGE TO THE FLEX COUPLING MAY OCCUR. REMOVE THE THERMOSTAT AND THE COOLANT INLET PIPE FROM THE WATER PUMP HOUSING AND SEPARATE THE ASSEMBLY FROM THE ENGINE. LOWER THE VECHICLE REMOVE THE BRAKE BOOSTER VACUUM HOSE FROM THE CAMSHAFT HOUSING. REMOVE THE FRONT TIMING CHAIN COVER AND THE TIMING CHAIN TENSIONER FROM THE ENGINE. CAUTION THE TIMING CHAIN TENSIONER MUST BE REMOVED TO UNLOAD CHAIN TENSION BEFORE REMOVING THE WATER PUMP FROM THE HOUSING OTHERWISE THE WATER PUMP WILL BECOME JAMMED IN THE TIMING CHAIN HOUSING. REMOVE THE HEATER OUTLET PIPE FROM THE WATER PUMP COVER. REMOVE THE WATER PUMP COVER BOLTS FROM THE ENGINE BLOCK AND THE WATER PUMP. REMOVE WATER PUMP RETAINING NUTS AND SEPARATE THE WATER PUMP FROM THE TIMING CHAIN HOUSING. CLEAN THE SEALING SURFACES OF ALL GASKET MATERIAL ON THE WATER PUMP, WATER PUMP COVER AND THE TIMING CHAIN HOUSING. WIPE THE MATING SURFACES WITH A RAG SATURATED LACQUER THINNER OR ACETONE. YOU CAN BUY THESE CHEMICAL AT LOWES OR WALMART DEPARTMENT WHERE THEY SELL PAINTS. FIRST INSTALL THE WATER PUMP COVER AND GASKET TO THE WATER PUMP ON THE BENCH BUT LEAVE THE BOLTS FINGER TIGHT. APPLY A THIN LAYER OF RTV SEALANT TO BOTH SIDES OF THE NEW GASKET AND INSTALL THE GASKET ON THE WATER PUMP. WAIT FOR RTV SEALANT SET UP DRY FIRST. POSITION WATER PUMP AND WATER PUMP COVER ASSEMBLY INTO TIMING CHAIN HOUSING ENGAGING THE WATER PUMP SPROCKET IN THE TIMING CHAIN, AND INSTALL THE NUTS FINGER TIGHT. USE CAUTION TO ENSURE THAT THE GASKET DOESNT SLIP OUT OF POSITION. LEAVE THE NUTS LOOSE TO ALLOW REPOSITIONING WHEN THE BLOCK BOLTS ARE INSTALLED IN THE NEXT STEP. INSTALL THE WATER PUMP COVER TO ENGINE BLOCK BOLTS AND TIGHTEN THEM BY HAND. LUBRICATE THE O - RING ON THE HEATER OUTLET PIPE WITH COOLANT AND INSTALL IT INTO THE WATER PUMP COVER. HAND TIGHTEN THE BOLTS. NOW THAT THE ENTIRE WATER PUMP HOUSING ASSEMBLY IS INSTALLED AND IS FITTED AGAINST THE ENGINE BLOCK. TIGHTEN BOLTS CRISS CROSS SEQUENCE TO INSURE PROPER SEAL TORQUE WATER PUMP TO TIMING CHAIN HOUSING NUTS TO 19 FT LBS .NOW TORQUE WATER PUMP COVER TO WATER PUMP HOUSING BOLTS TO 124 INCH POUNDS. TORQUE WATER PUMP COVER TO ENGINE BLOCK BOLTS 19 FT LBS. TORQUE 124 INCH POUNDS THE RADIATOR OUTLET PIPE TO WATER PUMP HOUSING. INSTALL THE TIMING CHAIN TENSIONER AND COVER. INSTALL THE EXHAUST MANIFOLD. INSTALL THE EXHAUST PIPE TO THE EXHAUST MANIFOLD. WHEN ALL IS DONE. START POURING COOLANT IN THE RADIATOR OR COOLANT OVER FLOW JUG.CHECK FOR LEAKS. IF IS GOOD KEEP ADDING COOLANT TO RADIATOR OR OVER FLOW RESERVOIR UNTIL COOLANT LEVEL STOP DROPPING. NOW START ENGINE. WATCH THE COOLANT LEVEL WHEN START DROPPING ADD MORE COOLANT IN RADIATOR OR OVERFLOW JUG. WHEN COOLANT STOP DROPPING INSTALL RADIATOR CAP OR OVERFLOW JUG CAP. LET ENGINE IDLE UNTIL THERMOSTAT OPENS WATCH TEMPERATURE GAUGE WHEN TEMPERATURE GAUGE RISING TO OVERHEATING. TURN OFF ENGINE WAIT A WHILE TAKE A LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE TO RELEASE PRESSURE. WHEN PRESSURE RELEASE REMOVE RADIATOR CAP ADD MORE COOLANT. START ENGINE LET IDLE WATCH TEMP GAUGE. TEMP GAUGE START RISING AGAIN TURN OFF ENGINE LET IT SET A WHILE ADD MORE COOLANT. TO RADIATOR. WHEN ENGINE TEMPERATURE GAUGE STOP RISING AND THERMOSTAT OPENS YOUR COOLANT SYSTEM AIR IS BLED OUT. JUST LET VECHICLE SET A LITTLE CHECK COOLANT LEVEL MAKE ITS CORRECT BEFORE START DRIVING VECHICLE. IF YOU TAKE VECHICLE FOR TEST SPIN TAKE LARGE RAG AND PLENTY COOLANT WITH YOU.IF ENGINE START OVERHEATING WHILE DRIVING PULL OFF ROAD SAFELY WAIT 20 TO 30 MINUTES. USE LARGE RAG SLOWLY OPEN CAP A LITTLE RELEASE PRESSURE. THEN REMOVE RADIATOR CAP ADD MORE COOLANT IF NEEDED. HOPE THIS HELP.

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.
WHEN INSTALLING WATER PUMP MAKE SURE YOU FOLLOW THE TIGHTENING SEQUENCES THAT AFFECT SEALING. My frist one I messed up and broke the pump so becarful.
Installation
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.

Removal & Installation 2.2L Engine To Remove:

1. Disconnect the battery ground cable.
2. If equipped with an automatic transmission, remove the exhaust manifold..
3. Drain the cooling system.
4. Raise and safely support the vehicle.
5. Remove or disconnect the following:
   • Right front wheel and tire assembly.
   • Right front fender liner.
     
     
   • Access plate on the water pump sprocket from the timing cover.
6. Install J 43651 water pump sprocket holder or equivalent to the water pump sprocket.
7. Use the access plate bolts to attach J43651 to the engine front cover.
8. Remove or disconnect the following:
   • Bolts that secure the sprocket to the water pump.
   • Bolt that secures the engine block to the water pump.
   • Bolt that secures the engine front cover to the water pump.
   • Feed pipe that joins the thermostat housing to the water pump.
     
     
   • 2 Bolts that secure the water pump to the engine block.
   • Water pump.

To Install:

1. Use a threaded stud in the hub to align the water pump sprocket.
2. Install or connect the following:
   • Water pump.
   • 2 bolts that secure the water pump to the engine block.
   • Feed pipe that joins the thermostat housing to the water pump.
   • Front cover bolt and the bolt that secures the engine block to the water pump. Tighten the bolts to 15 ft lbs (20 Nm).
   • 2 of the bolts that secure the water pump sprocket to the water pump.
3. Remove the threaded stud.
4. Install the last bolt.
   • Tighten the bolts to 89 in lbs (10 Nm).
5. Remove J 43651.
6. Install the access plate on the water pump sprocket to the timing cover.
7. Install the access plate bolts.
   • Tighten the bolts to 18 in lbs (10 Nm).
8. Install the front fender liner.
9. Install the right front tire and wheel.
10. If equipped with an automatic transmission, install the exhaust manifold.
11. Fill the cooling system.
12. Connect the battery ground cable.

2.4L Engine To Remove:
Water pump 2.4L

1. Disconnect the negative battery cable
2. Drain the engine coolant.
3. Remove the exhaust manifold.
4. Remove the coolant intake pipe as follows:
   1. Remove the coolant inlet pipe bolts.
   2. Remove the wheel and tire assembly.
   3. Remove the engine splash shield.
   4. Remove the bolts from the transaxle-to-engine block brace and remove the brace.
   5. Remove the radiator hose from the coolant inlet pipe.
   6. Remove the coolant inlet pipe to oil pan bolt.
   7. Remove the coolant inlet pipe, thermostat and seal.
5. Lower the vehicle.
6. Disconnect the heater hose quick connect from the heater outlet pipe.
7. Remove the front timing chain cover and the chain tensioner.
8. Unfasten the water pump-to-cylinder block bolts.
9. Remove the water pump-to-timing chain housing nuts.
10. Remove the water pump and cover mounting bolts and nuts.
11. Remove the water pump and cover as an assembly. Separate the two pieces after removal.
12. Clean the mating surfaces.

To Install:

1. Install the water pump cover to the water pump assembly.
2. Install and hand tighten the pump cover mounting bolts.
3. Install water pump cover assembly.
4. Install and hand tighten the cover-to-block mounting bolts.
5. Install and hand tighten the water pump-to-timing chain housing nuts.
   • Tighten the water pump-to-timing chain housing mounting nuts to 19 ft lb (26 Nm).
   • Tighten the water pump cover-to-water pump mounting bolts to 124 in lb (14 Nm).
   • Tighten the water pump cover-to-engine block bolts starting with the bottom bolt first to 19 ft lb (26 Nm).
6. Install the heater hose to the water pump pipe.
7. Using new gaskets, install the exhaust manifold.
8. Install the oil level indicator and tube.
9. Connect the brake vacuum tube to the cam housing.
10. Raise and safely support the vehicle.
11. Install the catalytic converter.
12. Install the coolant inlet pipe.
    • Tighten the inlet pipe-to-oil pan bolt to 19 ft lb (26 Nm). Tighten the coolant inlet pipe bolt to 124 in lb (14 Nm).
13. Install the timing chain and tensioner.
14. Lower the vehicle.
15. Connect the oxygen sensor.
16. Fill cooling system and check the system for leaks.

3.4L Engine To Remove:

1. Disconnect the battery ground cable.
2. Drain the cooling system.
3. Loosen the water pump pulley bolts.
4. Remove or disconnect the following:
   • Drive belt.
   • Water pump pulley bolts and pulley.
   • Water pump bolts, pump and gasket.
   • Clean the water pump mating surfaces.

To Install:

1. Install or connect the following:
   • Water pump gasket and pump.
   • Water pump bolts.
     1. Tighten the water pump bolts to 89 in lbs (10 Nm).
   • Water pump pulley and bolt until snug.
   • Drive belt.
2. Tighten the water pump pulley bolts to 18 ft. lbs (25 Nm).
3. Fill the cooling system.
4. Check for leaks.
5. Connect the battery ground cable.

Removal & Installation

2.2L Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. Drain the engine coolant.
4. Remove or disconnect the following:
   Exhaust manifold, if equipped with n automatic transaxle Right front wheel Splash shield Water pump sprocket access plate from the timing cover
   
   
   
   Fig. Remove the water pump sprocket access plate from the timing cover -2.2L engine
   
5. Attach Water Pump Sprocket Holding Tool J 43651to the sprocket using the access plate bolts to secure the tool to the engine front cover.
   Sprocket to water pump bolts Engine block to water pump bolt Engine front cover to water pump bolt Thermostat housing to water pump feed pipe 2 water pump to engine block bolts Water pump
   
   
   
   Fig. Water pump mounting-2.2L engine
   

To install:

1. Use a threaded stud in the water pump hub to align the hub to the water pump sprocket.
   Water pump and bolts Thermostat housing to water pump feed pipe Engine front cover bolt and engine block to water pump bolt. Tighten the bolts to 15 ft. lbs. (20 Nm) 2 of the water pump sprocket to water pump bolts
   
2. Remove the threaded stud.
   Last water pump sprocket to water pump bolt and tighten the sprocket bolts to 89 inch lbs. (10 Nm).
3. Remove the tool.
   Water pump sprocket access plate to the timing cover and tighten the bolts to 89 inch lbs. (10 Nm) Splash shield Right front wheel Exhaust manifold, if removed
4. Fill the cooling system.
5. Connect the negative battery cable.

2.4L Engine

1. Before servicing the vehicle, refer to the precautions section.
2. Disconnect the negative battery cable.
3. Drain the cooling system.
4. Remove or disconnect the following:
   WARNING Do not rotate the flex coupling more than 4 degrees or damage may occur. Oxygen Sensor (O 2 S) electrical connector Exhaust manifold heat shield Coolant inlet housing bolt through the exhaust manifold Exhaust manifold brace-to-manifold bolt Manifold-to-exhaust pipe studs Coolant inlet housing-to-water pump cover bolt Exhaust pipe from the exhaust manifold by pulling it downward Coolant inlet pipe from the oil pan Brake vacuum pipe from the camshaft housing Exhaust manifold from the cylinder head Heater hose from the heater outlet pipe Timing chain cover and tensioner Water pump cover-to-engine bolts 3 water pump-to-timing chain housing nuts Water pump and cover assembly Water pump cover from the pump
   
   
   
   Fig. Exploded view of the water pump mounting-2.4L engine
   

continue...

There is one thermostat for coolant and it is located at the end of top radiator hose inside the kneck that it connects to. To replace this the hose has to be removed and then the kneck,thermostat is brass colored valve that covers center of hole,clean old gasket from block side and kneck replace with new one and gasket with a bit of rtv sealant tighten kneck evenly when putting it back on,connect hose wait a short while for rtv to set up and should be good to go,"make sure engine is full of coolant b4 reassembling,just pour strait in engine if it isn't or you can damage new thermostat.overheating can also be sign of water pump not working as well so if still having problem then it is possible cause and on older models radiators get clogged.