Toyota Celica/Supra 1971-1985 Repair Guide

Timing Belt

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INSPECTION



See Figures 1, 2, 3, 4, 5, 6 and 7

The Supra 5MG-E engine is the only model equipped with a timing belt. Toyota recommends replacing the belt at 60,000 miles (96,000 km), regardless of wear. To inspect the timing belt, remove the timing belt cover, as described in Engine & Engine Overhaul of this repair guide. Compare the condition of the timing belt to the accompanying illustrations, and replace it if any wear signs are evident.


WARNING
Besides avoiding the hassle of an unexpected breakdown, replacing the timing belt at the recommended interval can also save you from expensive engine problems, as damaged valves and/or pistons often result from a failed timing belt.

A failed timing belt may not necessarily break. Often, worn teeth on the belt cause it to slip, resulting in loss of timing and a non-running condition.

The complete timing belt removal and installation procedure can be found in Engine & Engine Overhaul of this repair guide.



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Fig. Fig. 1: Air pump drive belt tension checking locations



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Fig. Fig. 2: 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. 3: Check for parting of the belt



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Fig. Fig. 4: Check if the teeth are cracked or damaged



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Fig. Fig. 5: Look for noticeable cracks or wear on the belt face



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Fig. Fig. 6: You may only have damage on one side of the belt; if so, the guide could be the culprit



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Fig. Fig. 7: Foreign materials can get in between the teeth and cause damage

 
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