REPAIR INSTRUCTIONS
Page 237
RUNOUT
With the machined dowel method of installation,
flywheel housing runout is well within the old
service specification of 0.010 inch (0.254 mm)
Total Indicated Runout (TIR), when checked with
an alignment bar through the cylinder block main
bearing bores. However, when checking flywheel
runout using a dial indicator on the crankshaft
rear flange or the flywheel, results may exceed
0.010 inch (0.254 mm) due to factors such as
crankshaft movement within the bearing
clearances and other variables.
The dial indicator is the only method which can
be used at this stage of assembly (with
crankshaft in place). The machined dowel
method requires that crankshaft and piston
assemblies be removed.
Flywheel housing runout specifications are as
follows:
r
Runout checked with an alignment bar
installed through the cylinder block main
bearing bores: 0.010 inch (0.254 mm) TIR
maximum. Refer to Figure 250.
r
Runout checked with a dial indicator
(PT5035 with Z adapter PT5035-1) mounted
on the crankshaft rear flange or flywheel as
shown in Figure 251 is: 0.020 inch
(0.508 mm) TIR maximum. This way, the
runout may appear to be excessive due to
crankshaft movement within bearings and
other variables.
250
Figure 250 — Flywheel Housing Runout Check with
Alignment Bar
251
Figure 251 — Flywheel Housing Runout Check with Dial
Indicator
5_106_00.bk Page 237 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs
