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    Nissan Pick-ups and Pathfinder 1970-1988

    Timing Belt

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    REMOVAL & INSTALLATION



    VG30i Engines

    See Figures 1, 2, 3, 4, 5, 6, 7 and 8

    1. Remove the upper and lower timing belt covers.
    2.  
    3. Turn the crankshaft so that the No. 1 cylinder is at the TDC of the compression stroke.
    4.  
    5. Using chalk or paint, mark the relationship of the timing belt to the camshaft and the crankshaft sprockets; also, mark the timing belt's direction of rotation.
    6.  
    7. Loosen the timing belt tensioner and return spring, then remove the timing belt.
    8.  

    To install:

    CAUTION
    Before installing the timing belt, confirm that the No. 1 cylinder is set at the TDC of the compression stroke.

    1. Remove both cylinder head covers and loosen all rocker arm shaft retaining bolts.
    2.  

    The rocker arm shaft bolts MUST be loosened so that the correct belt tension can be obtained.

    1. Install the tensioner and the return spring. Using a hexagon wrench, turn the tensioner clockwise and temporarily tighten the lock-nut.
    2.  
    3. Make sure that the timing belt is clean and free from oil or water.
    4.  
    5. When installing the timing belt align the white lines on the belt with the punchmarks on the camshaft and crankshaft sprockets. Have the arrow on the timing belt pointing toward the front belt covers.
    6.  

    A good way (although rather tedious!) to check for proper timing belt installation is to count the number of belt teeth between the timing marks. There are 133 teeth on the belt; there should be 40 teeth between the timing marks on the left and right side camshaft sprockets, and 43 teeth between the timing marks on the left side camshaft sprocket and the crankshaft sprocket.

    1. 1986-87 Engines:
      1. Using a hexagon wrench, loosen the tensioner lock bolt, set the tensioner and then slowly turn the tensioner clockwise and counterclockwise 2-3 times.If the coarse tensioner stud has been removed, be sure to apply locking sealer to the threads before installing it.
      2.  
      3. Tighten the tensioner lock-nut to 32-43 ft. lbs. (43-58 Nm). Tighten the rocker arm shaft retaining bolts (in 2-3 stages) to 13-16 ft. lbs. (18-22 Nm).Before tightening, be sure to set the camshaft lobe at the position where the lobe is not lifted.
      4.  
      5. Install the upper and lower timing belt covers.
      6.  

    2.  
    3. 1988 Engines:
      1. While keeping the tensioner steady, loosen the lock-nut with a hexagon wrench.
      2.  
      3. Turn the tension approximately 70-80 degrees clockwise with the wrench and then tighten the lock-nut.
      4.  
      5. Turn the crankshaft in a clockwise direction several times and then slowly set the No. 1 piston to TDC of the compression stroke.
      6.  
      7. Apply 22 lbs. of pressure (push it in!) to the center span of the timing belt between the right side camshaft sprocket and the tensioner pulley and then loosen the tensioner lock-nut.
      8.  
      9. Using a 0.0138 in. (0.35mm) feeler gauge (the actual width of the blade must be 1 / 2 in. thick!) positioned as shown in the illustration, turn the crankshaft clockwise ( slowly! ). The timing belt should move approximately 2 1 / 2 teeth. Tighten the tensioner lock-nut, turn the crankshaft slightly and remove the feeler gauge.
      10.  
      11. Slowly rotate the crankshaft clockwise several more times and then set the No. 1 piston to TDC of the compression stroke.
      12.  
      13. Install the upper and lower timing belt covers.
      14.  

    4.  



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    Fig. Fig. 1: Loosening the timing belt tensioner-VG30i engines



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    Fig. Fig. 2: Camshaft and crankshaft sprocket alignment-VG30i engines



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    Fig. Fig. 3: Timing belt tensioner and return spring installation-VG30i engines



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    Fig. Fig. 4: Tighten the tensioner lock-nut-VG30i engines



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    Fig. Fig. 5: Timing belt-to-sprocket alignment-VG30i engines



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    Fig. Fig. 6: Check the timing belt tension-1988 VG30i engines



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    Fig. Fig. 7: Feeler gauge positioning-1988 VG30i engines



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    Fig. Fig. 8: Turn the crankshaft until the feeler gauge is in this position-1988 VG30i engines

     
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