Nissan Maxima 1993-1998 Repair Guide

Engine

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REMOVAL & INSTALLATION



In the process of removing the engine, you will come across a number of steps which call for the removal of a separate component or system, such as "disconnect the exhaust system" or "remove the radiator." In most instances, a detailed removal procedure can be found elsewhere in this guide.

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.
 
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. If your engine does not have lifting hooks, your local Nissan dealer can order them for you. DO NOT attempt to remove the engine/transaxle assembly without the proper lifting hooks; you could damage the cylinder heads. Use extreme caution when removing and installing the engine/transaxle assembly.
 
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.
 
After the engine has been removed, you can perform a partial or full teardown of the engine using the procedures outlined in this guide.
 

REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

It is recommended the engine and transaxle be removed as a single unit. The engine and transaxle can be separated after removal.



Click image to see an enlarged view

Fig. Fig. 1: Use a dolly or transmission jack to roll the engine/transaxle assembly from under the vehicle

On vehicles with air conditioning, it is vital to refer to General Information & Maintenance prior to performing this procedure.

  1. Matchmark the hood hinge relationship and remove the hood.
  2.  
  3. Release the fuel system pressure.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Raise and safely support the vehicle.
  8.  

The vehicle will have to be raised high enough to remove the engine/transaxle assembly from underneath the vehicle. Make certain the vehicle will not slip off the jackstands. Keep in mind the center of gravity will change drastically when the engine/transaxle assembly is removed; use extreme caution.

  1. Tag and detach all engine harness connectors.
  2.  
  3. Drain the coolant from the cylinder block and the radiator.
  4.  
  5. Drain the crankcase and the transaxle.
  6.  


CAUTION
The EPA warns that prolonged contact with used engine oil may cause a number of skin disorders, including cancer! You should make every effort to minimize your exposure to used engine oil. Protective gloves should be worn when changing the oil. Wash your hands and any other exposed skin areas as soon as possible after exposure to used engine oil. Soap and water, or waterless hand cleaner should be used.

  1. Remove the radiator and fan assembly.
  2.  
  3. Tag and disconnect all vacuum hoses, wires, and harness connectors attached to the engine /transaxle assembly.
  4.  


CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

  1. Disconnect the exhaust system from the engine.
  2.  
  3. Remove the driveshafts.
  4.  
  5. Remove the alternator, power steering pump and air conditioning compressor from the engine.
  6.  
  7. Disconnect the shift linkage (or control cable-automatic models) from the transaxle.
  8.  
  9. Attach a hoist to the engine.
  10.  
  11. Remove the bolts from the motor mount brackets, and lower the engine/transaxle assembly onto a dolly.
  12.  
  13. Roll the engine/transaxle assembly from underneath the vehicle.
  14.  

To install:


Click image to see an enlarged view

Fig. Fig. 2: Engine mounting detail-VG30E engines



Click image to see an enlarged view

Fig. Fig. 3: Engine mounting detail-VE30DE engines



Click image to see an enlarged view

Fig. Fig. 4: Engine mounting detail-VQ30DE engines

  1. Installation is the reverse of the removal procedure; but note the following steps:
  2.  



Do NOT start the engine without filling it with the proper type and of amount of new engine oil, and a new oil filter. Otherwise, severe engine damage will result.
 
Be sure to have the battery fully charged. The engine will have to be cranked for longer then usual to achieve oil pressure before starting the engine.
 
Crank the engine with the fuel pump fuse removed to achieve oil pressure before the engine is started.
 

Do not crank the starter for more than 15 seconds at a time; wait at least 10 seconds between each use. After the oil pressure light goes out, install the fuel pump fuse and start the engine.

 
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