RAM 1500 Van V8-5.9L VIN Z (1998)
Valve: Service and Repair
Valve Service
VALVE CLEANING
Clean valves thoroughly Discard burned, warped and cracked valves.
Remove carbon and varnish deposits from inside of valve guides with a reliable guide cleaner.
VALVE INSPECTION
Measure valve stems for wear. If wear exceeds 0.051 mm (0.002 inch), replace the valve.
REFACING VALVES AND VALVE SEATS
Valve Face And Seat Angles
The intake and exhaust valves have a 43-1/4° to 43-3/4° face angle and a 44-1/4° to 44-3/4° seat angle.
VALVES
Intake And Exhaust Valves
Inspect the remaining margin after the valves are refaced. Valves with less than 1.190 mm (0.047 inch) margin should be discarded.
VALVE GUIDES
Measure valve stem guide clearance as follows:
