Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Auxiliary (Jack) Shaft

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REMOVAL & INSTALLATION



See Figures 1, 2 and 3



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Fig. Fig. 1: Removing the auxiliary shaft (jackshaft)-E-Series engine



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Fig. Fig. 2: Checking the auxiliary shaft (jackshaft) bearing diameters with an inside micrometer-E-Series engine



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Fig. Fig. 3: Installing the welch plug into the block-E-Series engine

  1. Refer to the Timing Belt and/or Chain Removal and Installation procedures in this section, and remove the timing belt.
  2.  
  3. Pull the crankshaft sprocket from the crankshaft. Remove the jackshaft sprocket bolts, then separate the sprocket from the jackshaft.
  4.  
  5. Remove the lower locating plate from the cylinder block. Remove the jackshaft and the crankshaft oil seals from the locating plate.
  6.  
  7. Remove the jackshaft retaining plate, then pull the shaft out through the front of the cylinder block. Be careful not to damage the bearings.
  8.  

To install:
  1. Check the jackshaft bearing diameters (in the cylinder block) with an internal micrometer and the bearing diameters (of the jackshaft) with a micrometer; the clearance should not exceed 0.15mm, if it does exceed the limit, replace the jackshaft bearings.
  2.  
  3. Use a hammer and a brass drift, to remove and install the jackshaft bearings in the cylinder block.
  4.  

Be sure to align the oil hole in the bearing with the hole in the cylinder block. After installation, check the bearing clearances. Using sealant, install a new welch plug into the cylinder block.

  1. Install the jackshaft in the cylinder block with the retaining plate. Torque the jackshaft sprocket bolts to 6.5-9.0 ft. lbs. (8.8-12.2 Nm), the oil pump bolts to 5.8-7.2 ft. lbs. (8.0-9.8 Nm), the tensioner pulley bolts to 12-15 ft. lbs. (15-20 Nm), the timing cover bolts to 2.5-4.0 ft. lbs. (3.4-6.0 Nm), the crankshaft pulley bolt to 83-108 ft. lbs. (113-147 Nm).
  2.  
  3. Install the lower locating plate on cylinder block with oil new seals.
  4.  
  5. Install both sprockets and the timing belt.
  6.  
  7. Start engine, check timing and road test.
  8.  

 
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