ISUZU Amigo/Pick-ups/Rodeo/Trooper 1981-1996

Timing Belt

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See Figures 1, 2, 3, 4, 5 and 6



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Fig. Fig. 1: Do not bend, twist or turn the timing belt inside out. Never allow oil, water or steam to contact the belt



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Fig. Fig. 2: Check for premature parting of the belt



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Fig. Fig. 3: Check if the teeth are cracked or damaged



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Fig. Fig. 4: Look for noticeable cracks or wear on the belt face



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Fig. Fig. 5: You may only have damage on one edge of the belt; if so, the guide could be the culprit



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Fig. Fig. 6: Foreign materials can get in between the teeth and cause damage

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:



Hardening of black rubber; back side is glossy without resilience and leaves no indentation when pressed with a fingernail.
 
Cracks on rubber backing.
 
Cracks or peeling of the canvas.
 
Cracks on rib root.
 
Cracks on belt sides.
 
Missing teeth.
 
Abnormal wear of belt sides. The sides are normal if they are sharp, as if cut by a knife.
 

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.


WARNING
It is very important to replace the timing belt at the recommended intervals, otherwise expensive engine damage will likely result if the belt fails.

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 .

 
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