Nissan Pick-ups and Pathfinder 1989-1995

Engine

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REMOVAL & INSTALLATION



See Figures 1 through 5

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine under cover.
  4.  
  5. Disconnect the windshield washer hose. Scribe matchmarks around the hinges (for easy installation) and remove the hood.
  6.  



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Fig. Fig. 1: Removing the engine from the vehicle-6-cylinder shown (most engines similar)



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Fig. Fig. 2: Z24i engine mounting



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Fig. Fig. 3: VG30i engine mounting



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Fig. Fig. 4: KA24E engine mounting



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Fig. Fig. 5: VG30E engine mounting


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. Drain the engine oil. Drain the engine coolant from the radiator and the cylinder block.
  2.  


CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.

  1. If equipped, drain the automatic transmission fluid.
  2.  
  3. Disconnect the air cleaner hose, then remove the air cleaner.
  4.  
  5. Relieve the fuel pressure as described in Fuel System . Disconnect and plug all fuel lines.
  6.  
  7. Remove the radiator and shroud as detailed later in this information. On models with an automatic transmission oil cooler, disconnect and plug the oil lines at the radiator.
  8.  
  9. Remove the coupling fan.
  10.  
  11. Disconnect the two heater hoses at the engine.
  12.  
  13. Remove the drive belts.
  14.  
  15. Remove the power steering pump from its bracket (if equipped). Disconnect the ground strap from the bracket.
  16.  
  17. On models with air conditioning, loosen the drive belt and remove the air conditioning compressor. Position it out of the way with the refrigerant lines still attached.
  18.  
  19. Disconnect the transmission control linkage.
  20.  
  21. On 4wd models, disconnect the starter leads and remove the starter. On 2wd models, disconnect the starter motor leads.
  22.  
  23. Disconnect the speedometer cable. Tag and disconnect any electrical leads at the transmission.
  24.  
  25. On models with a manual transmission, remove the clutch release cylinder and its bracket from the transmission. Position it aside without disconnecting the hydraulic lines.
  26.  
  27. Remove the bolts and disconnect the exhaust pipe at the manifold.
  28.  
  29. On 4wd models, matchmark the front driveshaft to the transfer case flange, then remove the front driveshaft.
  30.  
  31. On 4wd models, carefully slide a floor jack underneath the front differential carrier and remove the front mounting bolt. Remove the rear mounting bolts and crossmember, then slowly lower the carrier.
  32.  
  33. On 4wd models, remove the transmission-to-engine bracket mounting nuts.
  34.  
  35. On 4wd models, remove the mounting bolts for the front engine mounts.
  36.  
  37. Attach an engine hoist chain to the lifting brackets on the engine, then raise the engine just enough to ease the weight on the front and rear engine mount insulators.
  38.  
  39. On 4wd models, remove the front differential carrier.
  40.  
  41. On 2wd models, matchmark the rear driveshaft to the transmission flange, then remove the driveshaft. Be sure to plug the hole in the extension housing.
  42.  
  43. On 2wd models, remove the transmission-to-rear engine mount bracket bolts.
  44.  
  45. On 2wd models, remove the transmission member.
  46.  
  47. On 4wd models, remove the transmission-to-engine mounting bolts.
  48.  
  49. Tighten the engine hoist chain and carefully lift the engine (4wd) or engine/transmission (2wd) assembly up and out of the truck. Be very careful not to bump into anything as the engine assembly comes out of the engine compartment.
  50.  

To install:
  1. Slowly lower the engine or engine/transmission assembly into the engine compartment.
  2.  
  3. Raise the transmission onto the crossmember with a floor jack.
  4.  
  5. Align the holes in the engine mounts and the frame, install the bolts, then remove the engine hoist chain.
  6.  
  7. On 4wd models, install the transmission-to-engine mounting bolts. Tighten the 16mm and 25mm bolts to 22-29 ft. lbs. (29-39 Nm).
  8.  
  9. On 2wd models, install the transmission member.
  10.  
  11. On 2wd models, install the transmission-to-rear engine mount bracket bolts and tighten to 30-38 ft. lbs. (41-52 Nm).
  12.  
  13. On 2wd models, install the rear driveshaft to the transmission flange.
  14.  
  15. On 4wd models, install the front differential carrier.
  16.  
  17. Install the mounting bolts for the front engine mounts and tighten to 23-31 ft. lbs. (31-42 Nm).
  18.  
  19. On 4wd models, install the transmission-to-engine bracket mounting nuts and tighten to 30-38 ft. lbs. (41-52 Nm).
  20.  
  21. On 4wd models, align the matchmarks on the front driveshaft with those on the transfer case flange, then install the front driveshaft.
  22.  
  23. Connect the exhaust pipe to the manifold.
  24.  
  25. Install the clutch release cylinder and its bracket to the transmission.
  26.  
  27. Connect the speedometer cable. Connect any electrical leads at the transmission.
  28.  
  29. On 4wd models, connect the starter leads and install the starter. On 2wd models, connect the starter motor leads.
  30.  
  31. Install the air conditioning compressor and drive belt.
  32.  
  33. Install the power steering pump and its bracket (if equipped). Be sure to connect the ground strap to the bracket.
  34.  
  35. Install and adjust the drive belts.
  36.  
  37. Connect the heater hoses.
  38.  
  39. Install the coupling fan.
  40.  
  41. Install the radiator and shroud. If so equipped, unplug and connect the automatic transmission oil cooler lines.
  42.  
  43. Install all fuel lines and the air cleaner assembly.
  44.  
  45. Refill the engine, cooling system and, if applicable, the automatic transmission.
  46.  
  47. Install and adjust the hood.
  48.  
  49. Install the engine under cover.
  50.  
  51. Connect the negative battery cable, then start the truck and road test it for proper operation. Recheck all fluid levels and add, as necessary.
  52.  

 
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