Nissan Maxima 1993-1998 Repair Guide

Oil Pan

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REMOVAL & INSTALLATION



VG30E and VE30DE Engine

See Figures 1 through 9

  1. Raise and safely support the vehicle.
  2.  
  3. Connect a lifting device to the engine and apply upward pressure to take the engine weight off the engine mounts or support the engine by using the crankshaft damper.
  4.  
  5. Remove the oil pan plug and drain the oil into a container.
  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 splash shields from under the engine.
  2.  
  3. Remove the exhaust pipe-to-exhaust manifold bolts and lower the exhaust pipe.
  4.  



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Fig. Fig. 1: Disconnect the exhaust pipes at the manifolds and lower the pipe to allow clearance to remove the oil pan

  1. Remove the engine mount insulator-to-crossmember nuts and bolts.
  2.  



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Fig. Fig. 2: Make sure the engine is secure before removing the mounts attached to the crossmember

  1. Remove the center crossmember-to-chassis bolts and the crossmember.
  2.  



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Fig. Fig. 3: After the mounts are unbolted, remove the four bolts that attach the crossmember to the body

  1. Remove the oil pan-to-engine bolts, in sequence.
  2.  



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Fig. Fig. 4: Remove the oil pan bolts in order to prevent distortion of the pan

  1. Using the oil pan removal tool KV10111100 or equivalent, separate the oil pan from the engine.
  2.  



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Fig. Fig. 5: Carefully drive the seal cutter between the pan and the block ...



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Fig. Fig. 6: ... and then tap it along the perimeter of the oil pan to cut the seal


WARNING
Do not drive the seal cutter into the oil pump or rear oil seal retainer portion, for the aluminum mating surfaces will be damaged. Do not use a prybar, for the oil pan flange will be deformed. Use caution when pulling the oil pan free from the engine.

To install:
  1. Clean the mating surfaces of the engine and oil pan.
  2.  



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Fig. Fig. 7: Make sure the mating surfaces are free of any old liquid gasket before applying a new bead of liquid gasket to the oil pan

  1. Apply sealant to the 4 joints on the lower surface of the block. Apply sealant to the corresponding areas of the oil pan gasket on both upper and lower surfaces.
  2.  



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Fig. Fig. 8: Apply sealant as shown to the corners of the timing chain cover gasket and the rear oil seal retainer gasket



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Fig. Fig. 9: Run the bead of liquid gasket around the inside of the corners of the bolt holes on the oil pan

  1. Apply a continuous bead of liquid gasket (Nissan part #999MP-A7007 or equivalent RTV silicone sealant) 3.5 to 4.5 mm wide to the mating surface of the oil pan.
  2.  
  3. Install the oil pan and torque the oil pan-to-engine bolts, by reversing the removal sequence, to 5.1-5.8 ft. lbs. (7-8 Nm).
  4.  
  5. Install the exhaust pipe connections.
  6.  
  7. Install the center crossmember. Torque the center crossmember-to-body nuts/bolts and engine mount-to-crossmember nuts/bolts to 57-72 ft. lbs. (77-98 Nm).
  8.  
  9. After 30 minutes of gasket curing time, refill the oil pan with the specified quantity of clean oil. Operate the engine and check for leaks.
  10.  


WARNING
Operating the engine without the proper amount and type of engine oil will result in severe engine damage.

  1. Install the splash shields under the vehicle.
  2.  

VQ30DE Engine
lower oil pan

See Figures 10 and 11



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Fig. Fig. 10: VQ30DE upper and lower oil pans and torque specifications


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. Raise and safely support the vehicle.
  2.  
  3. Drain the oil from the engine.
  4.  
  5. Remove the lower splash shields from the vehicle.
  6.  
  7. Remove the lower oil pan bolts, in the reverse order of the tightening sequence.
  8.  



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Fig. Fig. 11: Loosen the bolts in numerical order to avoid warping the oil pan

  1. Using the oil pan gasket separator tool, (Nissan #KV10111100 or equivalent) break the seal between the upper and lower oil pans. Do NOT use a screwdriver to pry on the edge of the pan; the mating surfaces may be deformed.
  2.  
  3. Lower the oil pan from the engine. Keep in mind there may still be some oil in the pan even though the oil has been drained. Have a receptacle handy to drain any excess oil from the pan.
  4.  

To install:
  1. Clean the mating surfaces of the upper and lower oil pans.
  2.  
  3. Apply a continuous bead of liquid gasket (Nissan part #999MP-A7007 or equivalent RTV silicone sealant) 3.5 to 4.5 mm wide to the mating surface of the oil pan.
  4.  
  5. Install the oil pan and torque the oil pan-to-engine bolts, by reversing the removal sequence, to4.7-5.5 ft.lbs. (6.4-7.5 Nm.).
  6.  
  7. After 30 minutes of gasket curing time, refill the oil pan with the specified quantity of clean oil.
  8.  
  9. Operate the engine and check for leaks.
  10.  


WARNING
Operating the engine without the proper amount and type of engine oil will result in severe engine damage.

  1. Install the splash shields under the vehicle.
  2.  

upper oil pan

See Figures 12 through 21

  1. Remove the lower oil pan.
  2.  
  3. Remove the oil strainer from the oil pump housing.
  4.  



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Fig. Fig. 12: Be sure to properly torque the oil strainer bolts

  1. Remove the two crankshaft sensors (POS and REF) from the upper oil pan. Use caution when removing the sensors; the edges of the sensors and signal plate teeth can be easily damaged.
  2.  
  3. Disconnect the oil pressure switch.
  4.  
  5. Remove the oil filter.
  6.  
  7. Disconnect the exhaust system header pipe and remove it from the vehicle.
  8.  
  9. Using an engine hoist or a jack carefully placed under the crankshaft damper, support the engine so the center member can be removed.
  10.  



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Fig. Fig. 13: Be certain the engine is safely supported before removing the center member

  1. Unbolt the front and rear engine mounts, and the bolts that attach the center member to the body. Remove the center member from the vehicle.
  2.  
  3. Remove the accessory drive belts.
  4.  
  5. Unbolt the A/C compressor and mounting bracket. Use wire to hang the A/C compressor in position.
  6.  
  7. Remove the rear cover plate.
  8.  



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Fig. Fig. 14: Remove the bolts (arrows) and hang the A/C compressor aside

  1. Remove the upper oil pan-to-engine block bolts, in the sequence shown in the illustration. Take note that the removal sequence differs from the tightening sequence.
  2.  



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Fig. Fig. 15: Remove the rear transaxle cover plate-the bolts attach the upper oil pan to the transaxle



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Fig. Fig. 16: Upper oil pan bolt removal sequence

  1. Remove the transaxle-to-upper oil pan bolts.
  2.  



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Fig. Fig. 17: Remove the bolts that attach the upper oil pan to the transaxle

  1. Using a suitable tool, use the notch on the side of the oil pan to break it free from the engine.
  2.  



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Fig. Fig. 18: Use the notch on the oil pan to carefully break the seal

  1. Remove and discard the O-rings from the engine block and oil pump body.
  2.  



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Fig. Fig. 19: When installing the upper pan, always use new O-rings between the engine block and upper oil pan

To install:
  1. Thoroughly clean all traces of liquid gasket from the engine block, oil pan mating surface, and the bolt holes.
  2.  
  3. Apply liquid gasket sealant (Nissan part #999MP-A7007 or equivalent RTV silicone sealant) to the timing chain cover gasket and rear oil seal retainer gasket.
  4.  
  5. Apply A bead of liquid gasket to the mating surface of the upper oil pan.
  6.  
  7. Install new O-Rings on the engine block and oil pump body.
  8.  
  9. Install the upper oil pan to the engine. Torque the bolts to 12-14 ft.lbs (116-19 Nm.) in order as shown in the illustration.
  10.  



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Fig. Fig. 20: Upper oil pan tightening sequence. Note the tightening sequence differs from the removal sequence

  1. Install the bolts that attach the upper oil pan to the transaxle. Torque the bolts to 26-35 ft.lbs (35.1-47.1 Nm.).
  2.  
  3. Install the rear cover plate.
  4.  
  5. Attach the A/C compressor bracket and compressor to the engine. torque the bolts to 34-44 ft. lbs. (45-60 Nm.).
  6.  
  7. Install the accessory drive belts and set them to the proper tension.
  8.  
  9. Install the center member to the engine mounts and to the body. Tighten the bolts and nuts to 57-72 ft. lbs. (77-98 Nm.).
  10.  
  11. Install the two crankshaft position sensors (POS and REF) and the front oxygen sensor harness clamp.
  12.  



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Fig. Fig. 21: Make certain the oxygen sensor harness clamp is positioned as shown in the figure

  1. Connect the oil pressure switch connector.
  2.  
  3. Install the exhaust header pipe and support. Be sure to use new gaskets to prevent exhaust leaks.
  4.  
  5. Install the oil strainer to the oil pump inlet.
  6.  
  7. Install the lower oil pan.
  8.  
  9. After waiting at least 30 minutes for the liquid gasket to cure, install a new oil filter and fill the engine with fresh oil.
  10.  


WARNING
Operating the engine without the proper amount and type of engine oil will result in severe engine damage.

  1. Start the engine and check that there are no leaks from the oil pan mating surfaces.
  2.  
  3. Install the lower splash shields to the vehicle.
  4.