Valve Timing Check

Remove all spark plugs and left cylinder head cover. Rotate crankshaft until cylinder No. 1 is a Top Dead Center (TDC). Install a dial indicator in spark plug hole for cylinder No. 1 and set piston at Top Dead Center (TDC) in valve overlap (with intake valve starting to open and exhaust valve just closing). Install a degree wheel on crankshaft. Fabricate a pointer made of wire and set it up so 0° mark on degree wheel is aligned with pointer.
Remove dial indicator from spark plug hole and install dial indicator over #1 cylinder intake valve retainer with dial indicator shaft parallel to valve stem. Rotate crankshaft clockwise until dial indicator reads maximum lift. Back up crankshaft until dial indicator has dropped at least .050" from maximum lift. Rotate crankshaft slowly forward until dial indicator reads .025" less than maximum lift. Records degrees after TDC. If crank is accidentally rotated past point of .025" lift, rotate backwards until dial indicator reads at least .050" and rotate slowly clockwise again until reading of .025" is reached.
Rotate crankshaft clockwise past point of maximum valve lift and stop as dial indicator reads exactly .025" less than maximum valve lift. Record degrees after TDC. Once again, if crankshaft is rotated past .025" drop point, back up to TDC and rotate slowly to greater than .025" drop point. Add 2 numbers together and then divide by 2. The result is centerline of maximum intake camshaft lobe lift. This number must be 121° +/- 1°. If reading is out of specification, repeat procedure to verify result. If number of degrees is still out of specification, timing chain case cover will have to be removed and camshaft timing corrected to specification.