Cylinder Head and Valves 02 020 6 RG8773 –UN–19MAY98 Rocker Arm Assembly Identification 6. Check and adjust (as needed) valve stem-to-bridge clearance (lash) on intake valves Nos. 1, 2, and 4, and exhaust valves Nos. 1, 3, and 5 (shaded locations). Adjust preload on electronic unit injectors Nos. 3, 5, and 6 (shaded locations). Valve clearance is adjusted using JDG1333 Feeler Gauge Set or equivalent 1/4 inch (6.0 mm) wide automotive ignition point-type feeler gauge installed at the joint between the valve bridge and valve stem tip (B) that is near the exhaust (right) side of engine.
Loosen lock nuts, set clearance with adjusting screw and tighten lock nut to specified torque while holding adjusting screw stationary. RG8232 –UN–05DEC97 Adjusting Valve Lash/Clearance B—Valve Stem Tip Valve Stem-to-Bridge Clearance (Engine Cold)—Specification Intake Valve—Clearance 0.58 ± 0.05 mm (0.023 ± 0.002 in.) .......................... Exhaust Valve—Clearance 1.08 ± 0.05 mm (0.043 ± 0.002 in.) ....................... 7. Tighten intake and exhaust valve adjusting screw lock nuts to specifications. Specification Intake and Exhaust Valve Adjusting Screw Lock Nuts— Torque 50 (37 lb-ft) .............................................................................
Continued on next page RG,RG34710,63 –19–16OCT00–3/6 CTM100 (06APR04) 02-020-6 P OWER T ECH 10.5 L & 12.5 L Diesel Engines 040604 PN=78