Checking the timing belt of the gas distribution mechanism

1. Remove the upper timing cover (see «Replacing and adjusting the tension of the timing belt and replacing its tension roller»).

2. Inspect the condition of the timing belt. Replace the belt if, upon inspection, you find:

• traces of oil on any surface of the belt;
• signs of wear of the toothed surface, cracks, undercuts, folds and delamination of the fabric from the rubber;
• cracks, folds, depressions or bulges on the outer surface of the belt;
• fraying or delamination on the end surfaces of the belt.

Attention! Be sure to replace a belt with traces of engine oil on any of its surfaces, as oil quickly destroys rubber. Cause of oil on the belt (usually due to leakage of crankshaft and camshaft oil seals) must be eliminated immediately.

3. Check belt tension. A properly tensioned belt should rotate 90°with finger force 15–20 N (1.5–2 kgf), applied in the middle between the crankshaft and camshaft pulleys. Adjust belt tension if necessary (see «Replacing and adjusting the tension of the timing belt and replacing its tension roller»).

4. Install the parts in the reverse order of removal.