Mitsubishi Eclipse 1990-1998 Repair Guide

Timing Belts

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INSPECTION



See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10

All engines covered by this guide utilize timing belts to drive the camshaft from the crankshaft's turning motion and to maintain proper valve timing. Some manufacturer's schedule periodic timing belt replacement to assure optimum engine performance, to make sure the motorist is never stranded should the belt break (as the engine will stop instantly) and for some (manufacturer's with interference motors) to prevent the possibility of severe internal engine damage should the belt break.

Although the 1.8L engine is not listed as an interference motor (it is not listed by the manufacturer as a motor whose valves might contact the pistons if the camshaft was rotated separately from the crankshaft) the first 2 reasons for periodic replacement still apply and the timing belt should be replaced at 60,000 miles. The 2.0L and 2.4L engines are listed as interference motors, so the timing belt MUST be replaced at 60,000 miles to avoid severe engine damage if the belt should break.

But whether or not you decide to replace the timing belt in the manufacturers schedule, you would be wise to check it periodically to make sure it has not become damaged or worn. Generally speaking, a severely worn belt may cause engine performance to drop dramatically, but a damaged belt (which could give out suddenly) may not give as much warning. In general, any time the engine timing cover(s) is(are) removed you should inspect the belt for premature parting, severe cracks or missing teeth. Also, an access plug is provided in the upper portion of the timing cover so that camshaft timing can be checked without cover removal. If timing is found to be off, cover removal and further belt inspection or replacement is necessary.



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Fig. Fig. 1: On some vehicles, you can unfasten the timing belt inspection cover retaining bolt ...



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Fig. Fig. 2: ... then remove the inspection cover to check the cam timing and the condition of the timing belt



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Fig. Fig. 3: Check for premature 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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Fig. Fig. 8: Inspect the timing belt for cracks, fraying, glazing or damage of any kind



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Fig. Fig. 9: Damage on only one side of the timing belt may indicate a faulty guide



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Fig. Fig. 10: ALWAYS replace the timing belt at the interval specified by the manufacturer

For the timing belt removal and installation procedure, please refer to Engine & Engine Overhaul of this repair guide.

 
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