C 2500 Truck 2WD L6-292 4.8L (1986)
Fig. 33 Checking timing gear runout. 6-250 & 292
When the timing gears are installed, be sure the punch-marks on both gears are in mesh, Fig. 31. Backlash between the gears should be from .004 inch
to .006 inch, Fig. 32. Check the runout of the gears, Fig. 33, and if the camshaft gear runout exceeds .004 inch or the crank gear runout is in excess of
.003 inch, remove the gear (or gears) and examine for burrs, dirt or some other fault which may cause the runout. If these conditions are not the cause,
replace the gear (or gears).
