Clearance Setting

CAMSHAFT TIMING Timing Check Tools Needed: 9S9082 Engine Turning Tool.

1. Remove rear camshaft cover (3) from both sides of the engine.

1. Timing hole. 2. Timing pin. 3. Cover.

2. Make reference to FINDING TOP CENTER POSITION FOR NO. I PISTON.

NOTE: Since both rear camshaft covers have to be removed to check the timing, it is not necessary to remove No. 1 valve cover to find the compression stroke when timing bolt is installed in flywheel.

3. With timing bolt installed in flywheel, look at rear of camshaft to see if timing groove (slot) is visible on the camshaft. If it is visible, No. 1 piston is on the compression stroke. If it is not visible, feel the backside of the camshaft for the groove. If the groove is at the back of the camshaft, the flywheel will have to be turned 3600 to put No. 1 piston on the compression stroke.

INSTALLATION OF TIMING PINS 2. Timing pin. 4. Camshaft (L.H.).

4. With timing bolt installed in flywheel with No. 1 piston now on compression stroke, remove timing pins (2) from their storage positions.

5. Install timing pins (2) through holes (1) in the engine block and into the groove (slot) in camshaft (4) on each side of the engine. For the engine to be timed correctly, the timing pins must fit into the groove of each camshaft.

6. If timing pins (2) do not engage in the grooves of both camshafts, the engine is not in time, and one or both camshafts must be adjusted.

7. Both camshafts are adjusted the same way. See TIMING ADJUSTMENT for the procedure to put the camshafts in time with the crankshaft.

NOTICE

If a camshaft is out of time more than 18 degrees (approximately 1/2 the diameter of timing pin out of groove), the valves can make contact with the pistons. This will cause damage that will make engine repair necessary.

Timing Adjustment

Tools Needed: 9S9082 Engine Turning Tool. 6V3010 Puller Group. 9S9089 Two 1/2 - 13 NC Bolts 114.3 mm (4.50 in.) long. 5P1076 Two Washers (Hardened).

NOTE: Before any timing adjustments are made, the timing must be checked first to see if adjustment is necessary. See subject TIMING CHECK for this procedure.

After TIMING CHECK procedure is complete, timing bolt will be engaged in flywheel with No. 1 piston at top center (TC) position.

LOOSEN ROCKER SHAFTS 1. Bolt. 2. Rocker shaft.