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-   -   VG30E Timing Belt Replacement Guide and Questions (http://www.infamousnissan.com/forum/showthread.php?t=38677)

jp2code 12-13-2016 05:10 PM

VG30E Timing Belt Replacement Guide and Questions
 
5 Attachment(s)
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. Remove the engine under covers and drain engine coolant from the radiator; be careful not to allow coolant to contact drive belts.
  3. Remove the front right side wheel and tire assembly. Remove the engine side cover.
  4. Remove the drive belts from the engine.
  5. Rotate the crankshaft to position the No. 1 cylinder at the TDC of it's compression stroke.
  6. Remove the upper radiator hose and the water inlet hose. Remove the water pump pulley.
  7. Remove the idler bracket of the compressor drive belt.
  8. Remove the crankshaft damper. It may be necessary to use a puller to remove the crankshaft damper from the crankshaft.
  9. Remove the upper and lower timing belt covers.
  10. 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.
    http://www.infamousnissan.com/forum/...achmentid=1101
    Fig. 1: Line up the punchmarks on the sprockets with the marks on the rear timing belt cover before removal of the belt
    NOTE:
    There will not be any mark on the oil pump to align the crankshaft sprocket with until you put one there!

  11. 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.
    http://www.infamousnissan.com/forum/...achmentid=1102
    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.
  12. 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.
    http://www.infamousnissan.com/forum/...achmentid=1103
    Fig. 3: Make sure the aligning marks are correct before installing the timing belt onto the sprockets
  13. Swing tensioner fully clockwise with hexagon wrench and temporarily tighten locknut.
    http://www.infamousnissan.com/forum/...achmentid=1104
    Fig. 4: The tensioner uses a spring to aid in tensioning the timing belt. Be sure to use locking sealant when replacing the stud.
  14. 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.
    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.
  15. Loosen tensioner locknut, keeping tensioner steady with a hexagon wrench.
  16. Swing tensioner 70-80 clockwise with hexagon wrench and temporarily tighten locknut.
    http://www.infamousnissan.com/forum/...achmentid=1105
    Fig. 5: Lock the tensioner in position after turning it clockwise to allow for belt installation
  17. Remove the spark plugs. Turn crankshaft clockwise 2-3 times, then slowly set No. 1 cylinder at TDC on its compression stroke.
  18. Push middle of timing belt between right camshaft sprocket and tensioner pulley with a force of 22 lbs. (98 N).
    http://www.infamousnissan.com/forum/...achmentid=1106
    Fig. 6: Place the feeler gauge under the tensioner, and turn the crankshaft to position the gauge
  19. Loosen tensioner locknut, keeping tensioner steady with a hexagon wrench.
  20. 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.
    http://www.infamousnissan.com/forum/...achmentid=1107
    Fig. 7: The feeler gauge should be positioned directly between the tensioner and the belt
  21. Tighten tensioner locknut, keeping tensioner steady with a hexagon wrench.
  22. Turn crankshaft clockwise or counterclockwise and remove the gauge.
  23. 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.
  24. 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.
  25. Install the upper and lower belt covers.
  26. Install the crankshaft damper.
  27. Install the idler bracket of the A/C compressor drive belt.
  28. Install the upper radiator hose and the water inlet hose. Install the water pump pulley.
  29. Install the drive belts from the engine. Be sure to properly set the belt tension.
  30. Install the front right side wheel and tire assembly.
  31. Install the engine splash shield.
  32. Refill the engine with the proper quantity of coolant.
  33. Start the engine and check for proper operation.
VG30 Timing Belt Replacement PDF

jp2code 12-13-2016 05:12 PM

3 Attachment(s)
Prior to #12 above, it says not to rotate the crankshaft and camshaft separately.

Starting at #17, I get confused. Why would I "turn the crankshaft clockwise 2-3 times"? That seems completely contrary to what is said above.

Then, #19 wants me to loosen the tensioner locknut again, this time using a feeler gauge.

Could someone explain this?

raenglehart 12-13-2016 08:16 PM

Good question. I'm following now. Regardless of which vehicle, I've always locked whatever I could to avoid any pulley movement when doing this type job.

johnber 12-13-2016 11:16 PM

they are making it sound way complicated....must be gvt instructions. line up the marks, install the belt (then turn it over by and to check its free) start it up and and drive the damn thing!

jimstl99 09-08-2017 05:21 PM

Question for everyone. I have seen the "replace at 60,000 miles" mentioned several times perusing these forums. I have a 1995 VG30E and looking at my owners manual it recommends replacement every 105,000 miles.

Am I missing something?

Cheers.
Jim in STL

Deerhurst 09-08-2017 05:24 PM

Older trucks are 60k. Belts and pulky tooth design is different.

jp2code 09-08-2017 06:30 PM

You've got the Round Tooth VG30e, Jim.

Deerhurst, on the other hand, has the Square Tooth VG30i.

jimstl99 09-08-2017 08:07 PM

Thanks all for the clarification. Learning as I go...

cadillacdude1975 09-10-2017 12:17 PM

the next time i change my belt im gonna swap to the round pulleys.

ewrjontan 09-02-2019 11:01 AM

Anybody know the torque specs on everything that needs to be removed? More specifically, the crankshaft bolt?


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