Nissan Maxima 1993-1998 Repair Guide

Timing Belt

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REMOVAL & INSTALLATION




WARNING
Timing belt maintenance is extremely important! VG30E engines utilize an interference-type, non-free-wheeling engine. If the timing belt breaks, the valves in the cylinder head may strike the pistons, causing potentially serious (also time-consuming and expensive) engine damage. The recommended replacement interval for the timing belt is 60,000 miles (96,000 km), or sooner.

VG30E Engine

See Figures 1 through 7

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the engine under covers and drain engine coolant from the radiator; be careful not to allow coolant to contact drive belts.
  4.  
  5. Remove the front right side wheel and tire assembly. Remove the engine side cover.
  6.  
  7. Remove the drive belts from the engine.
  8.  
  9. Rotate the crankshaft to position the No. 1 cylinder at the TDC of it's compression stroke.
  10.  
  11. Remove the upper radiator hose and the water inlet hose. Remove the water pump pulley.
  12.  
  13. Remove the idler bracket of the compressor drive belt.
  14.  
  15. Remove the crankshaft damper. It may be necessary to use a puller to remove the crankshaft damper from the crankshaft.
  16.  
  17. Remove the upper and lower timing belt covers.
  18.  
  19. Make sure the punch marks on the camshaft sprockets align with the punch marks on the rear timing belt cover and the punch mark on the crankshaft sprocket aligns with the punch mark on the oil pump.
  20.  



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Fig. Fig. 1: Line up the punchmarks on the sprockets with the marks on the rear timing belt cover before removal of the belt

  1. Loosen the timing belt idler pulley bolt. Using a hexagon wrench, rotate the idler pulley to release it's tension and remove the timing belt.
  2.  



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Fig. Fig. 2: After the timing marks are lined up, loosen the tensioner and remove the belt

Be careful not to bend the new belt installing it. Timing belts are designed to flex only the way they turn around the pulleys.

To install:

After removing timing belt, do not rotate crankshaft and camshaft separately, because valves will hit piston heads.

  1. Confirm that No. 1 cylinder is at TDC on its compression stroke. Install tensioner and tensioner spring. If stud is removed apply locking sealant to threads before installing.
  2.  



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Fig. Fig. 3: Make sure the aligning marks are correct before installing the timing belt onto the sprockets

  1. Swing tensioner fully clockwise with hexagon wrench and temporarily tighten locknut.
  2.  



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Fig. Fig. 4: The tensioner uses a spring to aid in tensioning the timing belt. Be sure to use locking sealant when replacing the stud.

  1. Set timing belt, align the arrow on the timing belt forward. Align the white lines on the timing belt with the punch marks on all 3 pulleys.
  2.  

There are 133 total timing belt teeth. If timing belt is installed correctly there will be 40 teeth between left and right camshaft sprocket timing marks. There will be 43 teeth between left camshaft sprocket and crankshaft sprocket timing marks.

  1. Loosen tensioner locknut, keeping tensioner steady with a hexagon wrench.
  2.  
  3. Swing tensioner 70-80° clockwise with hexagon wrench and temporarily tighten locknut.
  4.  



Click image to see an enlarged view

Fig. Fig. 5: Lock the tensioner in position after turning it clockwise to allow for belt installation

  1. Remove the spark plugs. Turn crankshaft clockwise 2-3 times, then slowly set No. 1 cylinder at TDC on its compression stroke.
  2.  
  3. Push middle of timing belt between right camshaft sprocket and tensioner pulley with a force of 22 lbs. (98 N).
  4.  



Click image to see an enlarged view

Fig. Fig. 6: Place the feeler gauge under the tensioner, and turn the crankshaft to position the gauge

  1. Loosen tensioner locknut, keeping tensioner steady with a hexagon wrench.
  2.  
  3. Using a feeler gauge or equivalent, which is 0.0138 in. (0.35mm) thick and 0.500 in. (13mm) wide, set the gauge at the bottom of tensioner pulley and timing belt. Turn crankshaft clockwise and position the gauge completely between tensioner pulley and timing belt. The timing belt will move about 2.5 teeth.
  4.  



Click image to see an enlarged view

Fig. Fig. 7: The feeler gauge should be positioned directly between the tensioner and the belt

  1. Tighten tensioner locknut, keeping tensioner steady with a hexagon wrench.
  2.  
  3. Turn crankshaft clockwise or counterclockwise and remove the gauge.
  4.  
  5. Rotate the engine 3 times, then set No. 1 at TDC on its compression stroke. Verify that the marks line up in the proper positions on the sprockets.
  6.  
  7. Measure the deflection of the timing belt between the two camshaft sprockets. The belt should deflect 0.51-0.59 in. (13-15 mm) with 22 lbs. of force. If the tension is incorrect, reset the tension as required.
  8.  
  9. Install the upper and lower belt covers.
  10.  
  11. Install the crankshaft damper.
  12.  
  13. Install the idler bracket of the A/C compressor drive belt.
  14.  
  15. Install the upper radiator hose and the water inlet hose. Install the water pump pulley.
  16.  
  17. Install the drive belts from the engine. Be sure to properly set the belt tension.
  18.  
  19. Install the front right side wheel and tire assembly.
  20.  
  21. Install the engine splash shield.
  22.  
  23. Refill the engine with the proper quantity of coolant.
  24.  
  25. Start the engine and check for proper operation.
  26.  

 
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