1998 Nissan Altima engine removal

Engine Mechanical problem
1998 Nissan Altima 4 cyl Front Wheel Drive Manual

Hi I need to replace my 2.4 engine in 98 nissan altima any body know the secuence to do it and is any special tool needed for this job? Thanks
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Friday, February 6th, 2009 AT 9:20 PM

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It is virtually impossible to list each individual wire and hose which must be disconnected, simply because so many different model and engine combinations have been manufactured. Careful observation and common sense are the best possible approaches to any repair procedure.

Removal and installation of the engine can be made easier if you follow these basic points:

If you have to drain any of the fluids, use a suitable container.
Always tag any wires or hoses and, if possible, the components they came from before disconnecting them.
Because there are so many bolts and fasteners involved, store and label the retainers from components separately in muffin pans, jars or coffee cans. This will prevent confusion during installation.
After unbolting the transmission or transaxle, always make sure it is properly supported.
If it is necessary to disconnect the air conditioning system, have this service performed by a qualified technician using a recovery/recycling station. If the system does not have to be disconnected, unbolt the compressor and set it aside.
When unbolting the engine mounts, always make sure the engine is properly supported. When removing the engine, make sure that any lifting devices are properly attached to the engine. It is recommended that if your engine is supplied with lifting hooks, your lifting apparatus be attached to them.
Lift the engine from its compartment slowly, checking that no hoses, wires or other components are still connected.
After the engine is clear of the compartment, place it on an engine stand or workbench.

The engine and transaxle must be removed as a single unit. The engine and transaxle are removed from under the vehicle.
Matchmark the location of the hinges on the hood and remove the hood from the vehicle.
Properly relieve fuel system pressure.
Disconnect the negative, then the positive battery cables. Remove the battery and battery tray.
Drain and recycle the engine coolant.
If equipped with an automatic transaxle, disconnect the cooler lines from the radiator.
Remove the upper and lower hoses from the radiator and then remove the radiator assembly.
Disconnect the heater hoses from the engine.
Disconnect the throttle cable and cruise control cable (if equipped).
Remove the air cleaner, air box, and intake hose.
Disconnect the fuel feed and return hoses.
Label and disconnect all appropriate vacuum hoses.
Label and disconnect all appropriate electrical harnesses.
Disconnect the wiring from the starter motor.
If equipped, disconnect the slave cylinder from the transaxle. It is not necessary to disconnect the hydraulic hose.
Remove the accessory drive belts.
Remove the alternator, A/C compressor and power steering pump from the engine.
Do not disconnect the A/C lines. Lay the A/C compressor aside in the engine compartment.
Remove the right and left halfshafts from the transaxle.
Disconnect the exhaust pipe from the exhaust manifold.
Support the engine with a sling and support the transaxle with a jack.
Disconnect the left and right engine mounting through-bolts.
Remove the bolts that secure the crossmember to the vehicle and remove the crossmember.
Remove the front and rear engine mounts.
The engine and transaxle assembly should be removed through the bottom of the vehicle. Do not attempt to remove the assembly from above.
Lower the transaxle and engine assembly from the vehicle.

Position the engine and transaxle in the vehicle.
Install the front and rear engine mounts. Tighten the through-bolts to 27-55 ft. Lbs. (62-75 Nm).
Install the right and left engine mounts. Tighten the through-bolts to 12-21 ft. Lbs. (21-55 Nm).
Install the crossmember and tighten the mounting bolts to 57-72 ft. Lbs. (77-98 Nm).
Remove the engine and transaxle supports.
The balance of installation is the reverse of the removal procedure.
Refill and bleed the cooling system.
Refill the engine with the correct grade and viscosity of engine oil. Check all the fluid levels.
Start the engine, bleed the cooling system, and check for leaks. Make all the necessary adjustments.
Install the hood.

Number one thing to remember is DO NOT RUSH the repair job. Take your time and ensure everything is done correctly.

If the procedures call to remove a certain component that you are unsure how to do, just let me know and I will post the procedures for that component as well.

Thanks for using 2CarPros. Com!
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Friday, February 6th, 2009 AT 9:45 PM

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