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20 Feb 2017

Incorrect Rotation can lead to System failure on Holden engines

Incorrect Rotation can lead to System failure on Holden 1.6, 1.8, 2.0, 2.2 16V ENGINES 

Gates Timing Belt Part Numbers: T305, T309, T1057, T1064, T1094 & T1566 These are used in engines:

C14SEL, X14XE
C16SEL, C16XE, X16XE, X16XEL, Y16XE, Z16XE
C18XE, C18XEL, X18XE, X18XEL, Z18XE, Z18XEL
X20XEV
X22SE, X22XE, Y22SE, Y22XE, Z22XE

IMPORTANT:

  • Only install belt and tensioner when engine is at room temperature.
  • Only rotate engine CLOCKWISE !!!
  • Never re-install a used belt (tensioners are developed for new belts!). The „USED? position on the base plate is where the pointer will move towards during the life of the belt.
  • Camshaft- and crankshaft sprockets should not rotate unless the belt is installed and tensioned.
  1. Incorrect Rotation Image 01Align Top Dead Centre (TDC) marks. As the same engine used in a different model can have a different belt, we give the TDC marks following belt number here, and not following engine code. T1064, T1094: crankshaft: 5 O?clock, L-cam: 3 O?clock, R-cam: 9 O?clock T1057, T309, T305: crankshaft: 6 O?clock, camshafts 12 O?clock.
  2. Block camshafts
  3. Loosen tensioner bolt
  4. Turn tensioner clockwise and remove belt
  5. Remove old tensioner
  6. Install new tensioner, hand tighten bolt. Tensioner lip has to be in oil pump housing slot. (Tensioner pointer has to sit behind water pump pulley). The allen keyhole has to be set in +/- 7 O-clock position (Fig. 1).
  7. Install new belt anti-clockwise starting at crankshaft
  8. Incorrect Rotation Image 02Turn tensioner (with allen key) anti-clockwise (while holding the bolt in place) till pointer is in line with (not passing) right hand side of base plate (Fig. 2)
  9. Tighten tensioner bolt (+/- 20 Nm)
  10. Unblock camshafts
  11. Turn engine (manually) 2 revolutions via crankshaft (this for proper seating of the belt teeth in the grooves; and to distribute the tension), till TDC marks align again. If not aligned, restart at step 1.
  12. If pointer not in line with V ("NEW" position), block camshafts again
  13. Loosen tensioner bolt
  14. Adjust tensioner (while holding the tensioner bolt in place), till pointer in line with V ("NEW" position); the allen key hole has to be in +/- 5 O-clock positionIncorrect Rotation Image 03 now (Fig. 3)
  15. Tighten tensioner bolt (+/- 20 Nm)
  16. Unblock camshafts
  17. Turn engine 2 revolutions (via crankshaft), till TDC marks align again
  18. Check tensioner pointer position. If correct (in V) install other removed parts. If not correct,


ATTENTION

Rotating the tensioner in the wrong direction, having the allen keyhole in the wrong position to start off, not turning the engine 2 revolutions before and after setting the tension, can lead to system failure. This will cause the arm of the tensioner to hit the stop, creating a hammering noise, damaging and possibly even rupturing that part. This failure mode is very common and can easily be recognised when inspecting the edge of the arm (Fig. 4). The resulting wrong tension can cause the belt to rupture.

Incorrect Rotation Image 04

 

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