Timing Belt: Adjustments

Adjust valve timing whenever drive belt is removed or replaced. If timing belt requires removal, do not rotate crankshaft with belt removed.




Crankshaft may not be at TDC.
1. Mount drive (timing) belt on crankshaft and intermediate shaft sprockets.
2. Mount pulley and vibration dampener onto crankshaft with all four fasteners. Note installation position. Mark on camshaft sprocket must align with cylinder head cover. Mark on crankshaft pulley/vibration dampener must align with mark on intermediate shaft sprocket. Piston in No. 1 cylinder will be at TDC.
3. Mount drive belt on camshaft sprocket wheel. Tighten drive belt by turning tensioner clockwise. Torque to 33 ft.lbs. Ensure that drive belt can be twisted 90° at a point on the belt midway between camshaft and intermediate sprockets.
4. Install lock nut on tensioner, turn crankshaft twice and recheck belt tension.
5. Remove crankshaft pulley and vibration dampener.
6. Install lower and upper drive belt covers, V-belt pulley, vibration dampener, and V-belt.
7. Check ignition timing and adjust if necessary.




Vehicles use hydraulic valve lifters.
1. Run engine until coolant temperature is approximately 95°F.
2. Disconnect accelerator linkage.
3. Remove upper drive belt cover and the cylinder head cover.
4. Turn crankshaft pulley bolt clockwise until cam lobes of cylinder to be adjusted point up.
5. Using a suitable feeler gauge measure valve clearances.
6. On engines with hydraulic valve lifters, clearance should be .006-.010 inch for intake valve or .014-.018 inch for exhaust valve. A noisy hydraulic valve lifter will indicate excessive clearance, replace valve lifter(s) as required.