Timing Belt Cadillac Catera I

When servicing timing belt

1. Install timing belt with engine at room temperature.
2. DO NOT remove timing belt without first setting camshaft gears and crankshaft drive gear to TDC and locking them in place.
3. Guide marks on timing belt are to aid in timing belt installation. If guide marks cannot be identified, a NEW belt must be installed.

Removal

1. Disconnect negative battery cable. Remove MAF sensor (10). (Scheme 6) Remove the intake resonance switchover valve assembly (3). Remove and label electrical connector and vacuum lines at switchover valve solenoid and vacuum reservoir (4). Remove Intake resonator (7).
2. Remove intake plenum. See «INTAKE PLENUM»(ref-1455-S27924544572000031300000)
3. Place cylinder No. 1 to TDC of compression stroke. Remove front timing belt cover. See «FRONT TIMING BELT COVER»(ref-1455-S05758579002000031300000).
4. Visually inspect the timing belt for cracks and wear. If cracks or wear are present, do not reuse the belt.
5. Remove harmonic balancer bolts. see scheme 7
6. Remove harmonic balancer.
7. Rotate engine clockwise to 60 degrees Before Top Dead Center (BTDC). see scheme 8 IMPORTANT: Ensure timing marks are not 180 degrees out from TDC. The reference marks on the camshaft gears should be aligned with the corresponding notches on the rear timing belt cover at this point. If they are not aligned, the engine is 180 degrees off.
8. Install Crankshaft Holder (J42069-10)
9. Using J 42098, carefully rotate engine in rotational direction (Clockwise) until holder contacts water pump. see scheme 9 Secure the moveable lever of the tool to the water pump pulley flange. Ensure alignment marks on camshaft gears align with corresponding marks on rear timing belt cover. Install Camshaft Gear Holders (J42069-1 and J42069-2). see scheme 10 IMPORTANT: Do not remove J 42069-1 and the J 42069-2 while the belt is removed.
10. Loosen the timing belt tensioner and idler pulleys.
11. Remove timing belt. IMPORTANT: After timing belt is removed, never turn camshaft and crankshaft independently. If turned, interference may occur among pistons and valves, and parts related to pistons and valves may be damaged.

Installation

Note. When installing a new or used timing belt, the directional arrows on the timing belt must be matched with the rotation of the crankshaft. If this precaution is not observed, excessive wear and timing belt failure may occur.

Scheme 6

1. To install, remove J 42069 crankshaft holder.
2. Raise and support vehicle.
3. Start at the crankshaft sprocket and install the timing belt with the double dash (TDC) mark on the belt aligned with the marks on the oil pump and on the belt drive gear.
4. Install Timing Belt Holder (J42069-30) to pinch belt and prevent teeth from jumping during installation. see scheme 11
5. Lower vehicle.
6. Route the timing belt through the timing belt tensioner (2).
7. Slip the timing belt through camshaft gears 1 and 2 simultaneously (3), ensuring the dash marks on the timing belt align with the marks on the camshaft gears and the notches on the rear timing belt cover.
8. Route the timing belt through the idler pulley for camshafts 1 and 2 (4).
9. Route the timing belt through the idler pulley for camshafts 3 and 4 (5).
10. Slip the timing belt through camshaft gears 3 and 4 simultaneously (6), ensuring the dash marks on the timing belt align with the marks on the camshaft gears and the notches on the rear timing belt cover.
11. Measure the timing belt deflection between camshaft gear number 4 and the idler pulley for camshafts 3 and 4, the deflection must be no more than 0.4 in (10 mm). see scheme 13
12. If timing belt deflection adjustment is necessary: 12.1 Turn the timing belt idler pulley nut for camshafts 3 and 4 COUNTERCLOCKWISE, with J 42069-40 until the high point of the nut is in approximately the 12 o'clock position. 12.2 Tighten the idler pulley locking bolt, while holding the nut with J 42069-40, until snug. The idler pulley bolt will be tightened to specifications after all final adjustments are made.
13. Apply additional tension to the timing belt, at the idler pulley for camshafts 1 and 2, by turning the high point of the nut to approximately the 9 o'clock position. Then, tighten the idler pulley locking bolt, while holding the nut with J 42069-40, until snug. The idler pulley bolt will be tightened to specifications after all final adjustments are made.
14. Set the initial timing belt tension: 14.1. Turn the tensioner nut COUNTERCLOCKWISE to full stop, then, turn the nut back until the reference mark is 0.003 in (1 mm) over the flange. 14.2. Tighten the timing belt tensioner locking nut until snug, the locking nut will be tightened to specifications after all final adjustments are made.
15. Inspect the alignment marks on the timing belt to ensure that they are aligned with the appropriate reference points on the camshaft gears, the rear timing belt cover and on the oil pump housing. see scheme 16
16. Remove Timing Belt Aligner(s) (J42069-30, J42069-1 and J42069-2).
17. Using Crank Hub Socket (J42098), rotate engine clockwise, two revolutions, stopping at 60 degrees Before Top Dead Center (BTDC). see scheme 8
18. Install Timing Belt Aligner (J42069-10), onto crankshaft sprocket with knurled knob.
19. Turn crankshaft until lever of aligner firmly touches water pump pulley flange.
20. Secure the moveable lever of the tool to the water pump pulley flange. IMPORTANT: The alignment marks on the timing belt will no longer align with the marks on the camshaft gears after one or more engine revolutions.
21. Inspect the alignment of the reference marks on the camshaft gears with the notches on the rear timing belt cover, as well as, the mark on the crankshaft sprocket and oil pump housing.
22. Use the J 42069-20 to inspect the alignment of camshaft gears 3 & 4.
23. Use the J 42069-20 to inspect the alignment of camshaft gears 1 & 2.
24. If timing belt adjustment IS required, refer to «Timing Belt Timing Adjustment»(ref-1455-S15089998842010072900000)
25. If timing belt adjustment IS NOT required, set the final timing belt tension: 25.1. Loosen the timing belt tensioner locking nut. 25.2. Turn the locking nut counterclockwise to full stop, then back until the reference mark is 0.078-0.157 in (2-4 mm) ABOVE the reference mark on the flange. Tighten the timing belt tensioner locking nut 15 lb ft (20 N.m). 25.3. Hold the timing belt idler pulley nut in place for camshafts 1 & 2 and 3 & 4 with the J 42069-40. Tighten both idler pulley bolts to 30 lb ft (40 N.m).
26. Inspect the highpoints of the timing belt tensioner nut. The idler pulley nut high point for camshafts 3 and 4 will be in approximately the 12 o'clock position. The idler pulley nut high point for camshafts 1 and 2 will be in approximately the 9 o'clock position.
27. Remove the J 42069-20 and the J 42069-10.
28. For final inspection, rotate the engine in the clockwise direction two revolutions until reaching 60 degrees BTDC.
29. Install the J 42069-10 to the crankshaft sprocket with the knurled bolt.
30. Turn the crankshaft until the lever of the J 42069-10 firmly contacts the water pump pulley flange.
31. Secure the moveable lever of the tool to the water pump pulley flange.
32. Inspect the alignment of the reference marks on the camshaft gears with the notches on the rear timing belt cover, as well as, the mark on the crankshaft gear and the mark on the oil pump housing.
33. Use the J 42069-20 to inspect the alignment of camshaft gears 3 and 4.
34. Use the J 42069-20 to inspect the alignment of camshaft gears 1 and 2.
35. If the reference marks on the camshaft gears do not match exactly, adjust the timing belt. Refer to «TIMING BELT TIMING ADJUSTMENT»(ref-1455-S15089998842010072900000).
36. If the reference marks match exactly and further timing belt adjustment IS NOT necessary, continue with reassembly of the engine.
37. Ensure all tools are removed from the engine
38. Install the crankshaft balancer to the crankshaft sprocket. Tighten the crankshaft balancer bolts to 15 lb ft (20 N.m).
39. Install the timing belt cover. Refer to «FRONT TIMING BELT COVER»(ref-1455-S05758579002000031300000) Replacement
40. Install the intake plenum. Refer to See «INTAKE PLENUM»(ref-1455-S27924544572000031300000)
41. Install the Intake Air Resonator, vacuum hoses, electrical connectors and MAF sensor in reverse order of disassembly under Removal.