See Figures 1, 2, 3, 4, 5 and 6
Of the eight engines available for 1981-96 Isuzu trucks and sport utility vehicles, only four of them are equipped with timing belts, rather than timing chains. Timing chains generally do not need routine replacement or inspection, unless engine repairs are being done and inspection would be easy to do at the time. The timing belts on the 2.2L diesel, 2.3L, 2.6L and 3.2L engines do, however, need to be replaced at the 60,000 mile (96,000 km) and 120,000 mile (192,000 km) marks. If the timing belt is inspected earlier or more frequently than suggested, and shows signs of wear or defects, the belt should be replaced at that time.
Inspect both sides of the timing belt. Replace the belt with a new one if any of the following conditions exist:
If none of these conditions exist, the belt does not need replacement, unless it is at the recommended interval. The belt MUST be replaced at the recommended interval.
If the timing belt is not replaced at the recommended intervals, the engine will likely be damaged. Damage occurs since the valves and pistons come in contact with each other when the timing belt breaks. This can cause damage to the valves and pistons, necessitating extensive engine work.
For removal and installation procedures of the timing belt, please refer to Engine & Engine Overhaul .