Bore Runout
Use the dial indicator gauge (1 ), Part Number 3376050, or its equivalent, and dial gauge attachment (2), Part Number ST-1325, to inspect the flywheel bore (3) and the surface (4) runout.
Install the attachment to the flywheel housing.
Install the gauge on the attachment.
Install the contact tip of the indicator against the inside diameter of the flywheel bore, and set the dial indicator at
zero.
Use the barring tool, Part Number 3824591, to rotate the crankshaft one complete revolution.
If the total indicator reading is greater than the specification, do the following:
โข Remove the flywheel.
โข Inspect the flywheel mounting surface for dirt or damage.
โข Inspect the crankshaft for dirt or damage.
โข Install the flywheel.
โข Inspect the bore runout again.
โข Replace the flywheel if the runout does not meet specifications.
Face Runout
Flywheel Face Runout
Install the contact tip of the indicator against the flywheel face.
When locating the contact tip, see the Flywheel Face Runout Total Indicator Reading Table later in this
procedure. Locate the contact tip so that it corresponds with a radius listed in the table, but is still as close to the
outside diameter of the flywheel as possible, to inspect the flywheel face (1) runout.
Push the flywheel forward to remove the crankshaft end clearance. Adjust the dial on the indicator until the needle
points to zero.
Use the barring tool, Part Number 3824591, to rotate the crankshaft one complete revolution. Measure and record
the flywheel runout at four equal points on the flywheel.
The flywheel must be pushed toward the front of the engine to remove the crankshaft end clearance each time
a point is measured.
Determine the total indicator reading (TIR).
Total indicator reading is determined by calculating the difference between the highest and lowest measurement
from the four locations measured.
Measure the distance from the center of the flywheel to the contact tip of the indicator (A). Use this measurement
to determine which specification to use from the table below.
The total indicator reading must not exceed the following specifications:
If the flywheel face runout is not within specifications, remove the flywheel. First check for nicks, burrs, or foreign
material between the flywheel mounting surface and the crankshaft flange.
Replace the flywheel if the runout is not within specification.
