Trooper LS V6-3.5L (1998)
Valve Clearance: Adjustments
VALVE CLEARANCE ADJUSTMENTS
NOTE: To adjust valve clearance, apply engine oil to the cam as well as to the adjusting shim (2) with the cylinder head built on the cylinder block,
give a few turns to the camshaft by means of timing pulley tightening bolt, and measure valve clearance when the nose of cam is just opposite to
maximum cam lift (1) as shown in illustration.
Valve Clearance Standard Value (cold)
Intake: 0.23 mm - 0.33 mm (0.0091 inch - 0.0130 inch)
Exhaust: 0.25 mm - 0.35 mm (0.0098 inch - 0.0138 inch)
Selection of Adjusting Shim
Shim to be selected = (Thickness of removed shim) + (Valve clearance measurement - Standard value)
Based on the above formula, the best suited shim should be selected from 41 sorts of shim (differently thick at 0.02 mm (0.0008 inch) intervals from
2.40 mm (0.0945 inch) through 3.2 mm (0.1260 inch) thick). Install the shim and check valve clearance.
