Timing Belt: Testing and Inspection
Timing Belt Adjustment Checking^ Tools Required
- J 42069 Timing Belt Alignment Kit
- J 42098 Crank Hub Torx Socket
Important: The following steps are the continuation of Timing Belt Replacement and must not be performed as a stand-alone operation.
It is not uncommon to make several repeated adjustments and engine revolutions to achieve the proper timing belt alignment set points.
Important: Whenever timing belt adjustment is necessary, always start with, and adjust, camshafts 3 and 4 first.
1. Apply the J 42069-20 to camshaft gears 3 and 4.
2. Inspect the relationship of the marks on the camshaft gears to the marks on the J 42069-20. They must match exactly, if not, timing belt adjustment is required.
3. Apply the J 42069-20 to camshaft gears 1 and 2.
4. Inspect the relationship of the marks on the camshaft gears to the marks on the J 42069-20. They must match exactly, if not, timing belt adjustment is required.
5. Continue to the next applicable procedure:
Marks on Camshaft Gears 3 and 4 Align to the LEFT of J 42069-20
1. Loosen the timing belt idler pulley for camshaft gears 3 & 4.
2. Use the J 42069-40 to turn eccentric on the idler pulley COUNTERCLOCKWISE until the marks on the camshaft gears and on the J 42069-20 are in alignment (the high point of the idler pulley eccentric will be in approximately the 12 o'clock position).
Tighten the timing belt idler pulley bolt, while holding the eccentric in place with the J 42069-40 to prevent movement, to 40 Nm (30 ft. lbs.).
3. Remove the J 42069-10 and the J 42069-20.
4. Turn the crankshaft in the engine rotational direction two revolutions with the J 42098. Stop at 60 degrees BTDC.
5. Install the J 42069-10 to the crankshaft drive gear with the knurled bolt.
6. Use the J 42098 to carefully turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
7. Secure the moveable lever of the tool to the water pump pulley flange.
8. Install the J 42069-20 to camshaft gears 3 & 4.
9. Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20.
10. Repeat the procedure again if the marks do not align.
11. If camshaft gears 3 and 4 are properly aligned, continue checking the timing belt adjustment of camshaft gears 1 & 2. Make necessary corrections as outlined.
12. AFTER all applicable camshaft gear adjustments are made, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.
Marks on Camshaft Gears 3 and 4 Align to the RIGHT of J 42069-20
1. Loosen the timing belt idler pulley for camshaft gears 3 & 4.
2. Slacken the timing belt by turning the eccentric on the idler pulley CLOCKWISE with the J 42069-40 until the marks on the camshaft gears and the marks on the J 42069-20 are in alignment (the high point of the idler pulley eccentric will be in approximately the 12 o'clock position).
Tighten the timing belt idler pulley bolt, while holding the eccentric in place with the J 42069-40 Adjustment Wrench to prevent movement, to 40 Nm (30 ft. lbs.).
3. Remove the J 42069-10 and the J 42069-20.
4. Turn the crankshaft in the engine rotational direction two revolutions with the J 42098. Stop at 60 degrees BTDC.
5. Install the J 42069-10 to the crankshaft drive gear with the knurled bolt.
6. Use the J 42098 to carefully turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
7. Secure the moveable lever of the tool to the water pump pulley flange.
8. Install the J 42069-20 to camshaft gears 3 & 4.
9. Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20.
10. Repeat the procedure again if the marks do not align.
11. If camshaft gears 3 and 4 are properly aligned, continue checking the timing belt adjustment of camshaft gears 1 and 2. Make necessary corrections as outlined.
12. AFTER all applicable camshaft gear adjustments are made, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.
Marks on Camshaft Gears 1 and 2 Align to the LEFT of J 42069-20
1. Loosen the timing belt idler pulley for camshaft gears 1 & 2.
2. Use the J 42069-40 to turn eccentric on the idler pulley COUNTERCLOCKWISE until the marks on the camshaft gears and on the J 42069-20 are in alignment (the high point of the idler pulley eccentric will be in approximately the 9 o'clock position).
Tighten the timing belt idler pulley bolt, while holding the eccentric in place with the J 42069-40 to prevent movement, to 40 Nm (30 ft. lbs.).
3. Remove the J 42069-10 and the J 42069-20.
4. Turn the crankshaft in the engine rotational direction two revolutions with the J 42098. Stop at 60 degrees BTDC.
5. Install the J 42069-10 to the crankshaft drive gear with the knurled bolt.
6. Use the J 42098 to carefully turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
7. Secure the moveable lever of the tool to the water pump pulley flange.
8. Install the J 42069-20 to camshaft gears 1 & 2.
9. Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20.
10. Repeat the procedure again if the marks do not align.
11. If camshaft gears 1 and 2 are properly aligned, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.
Marks on Camshaft Gears 1 and 2 Align to the RIGHT of J 42069-20
1. Loosen the timing belt idler pulley for camshaft gears 1 & 2.
2. Slacken the timing belt by turning the eccentric on the idler pulley CLOCKWISE with the J 42069-40 until the marks on the camshaft gears and the marks on the J 42069-20 are in alignment (the high point of the idler pulley eccentric will be in approximately the 9 o'clock position).
Tighten the timing belt idler pulley bolt, while holding the eccentric in place with the J 42069-40 to prevent movement, to 40 Nm (30 ft. lbs.).
3. Remove the J 42069-10 and the J 42069-20.
4. Turn the crankshaft in the engine rotational direction two revolutions with the J 42098. Stop at 60 degrees BTDC.
5. Install the J 42069-10 to the crankshaft drive gear with the knurled bolt.
6. Use the J 42098 to carefully turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
7. Secure the moveable lever of the tool to the water pump pulley flange.
8. Install the J 42069-20 to camshaft gears 1 & 2.
9. Inspect the alignment of the marks on the camshaft gears in reference to the marks on the J 42069-20.
10. Repeat the procedure again if the marks do not align.
11. If camshaft gears 1 and 2 are properly aligned, set the final timing belt tensioner as outlined in Timing Belt Tensioner Adjustment at the end of this procedure.