RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
8. Rotate crankshaft and record indicator readings at eight points (45°apart) around the bore (Fig. 13). Take measurement at least twice for accuracy.
9. Subtract each reading from the one 180° opposite to determine runout and direction.
Bore runout example (Fig. 13):
0.000 - (-0.007) = 0.007 inch
+ 0.002 - (-0.010) = 0.012 inch
+ 0.004 - (-0.005) = 0.009 inch
- 0.001 - (+0.001) = -0.002 inch
In this example the largest or Total Indicator Reading (TIR) difference is 0.012 inch. This means the housing bore is offset from the crankshaft
centerline by 0.006 inch which is 1/2 of 0.012 inch. The dowels needed to correct this have an offset of 0.007 inch (Fig. 14).
Remove housing and install dowels with the slotted side facing out so they can be turned with a screwdriver. Then install the housing and mount
the dial indicator and check bore runout again. Rotate the dowels until the TIR is less than 0.010 inch.
