Inline 6-Cylinder Engines
- Rotate the crankshaft until no. 6 exhaust valve is closing and no. 6 intake valve is opening.
- Install a dial indicator so that the indicator pointer contact the valve spring retainer on the no. 1 intake valve parallel to the axis of the valve stem.
- Turn no. 1 intake adjusting screw in one complete turn to remove the lash. Adjust the dial indicator to zero.
- Rotate the crankshaft clockwise normal running direction until the valve has lifted 0.029".
- The timing of the crankshaft pulley should now read from 12° BTDC to DC. Re-adjust lash.
If the reading is not within specified limits, inspect the sprocket index marks, inspect the timing chain for wear, and inspect the accuracy of the "TDC" mark on the timing indicator.
V6 and V8 Engines
- Turn the crankshaft until the No. 6 exhaust valve is closing and the intake valve is opening.
- Insert a 1 / 4 " spacer between the rocker arm pad and stem tip of No. 1 intake valve. Allow the spring load to bleed the tappet down.
- Install a dial indicator so that the plunger contacts the valve spring retainer and nearly perpendicular as possible. Zero the indicator.
- Rotate the crankshaft clockwise until the valve has lifted 0.010" on the 318; 034" on the 360; 0.025" on the 400 and 440.
Valve timing is accomplished by simply aligning all gear timing marks as illustrated.
- The ignition timing marks should now read anywhere from 10°BTDC to 2°ATDC.
- If the reading is not within specifications, check for timing amrk alignment, timing chain wear and the accuracy of the ignition timing indicator.