Service Manual

Flywheel Housing ISB, ISBe and QSB (Common Rail [...]
Page 16-40 Section 16 - Mounting Adaptations - Group 16
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CAUTION
Do not remove the dowel rings located in the rear
gear housing in an attempt to relocate the flywheel
housing. The dowel rings are required to locate the
rear gear housing to the cylinder block for proper
gear alignment. Improper gear alignment will result in
engine damage.
If the bore alignment is out of specification:
1 Determine if the flywheel housing, rear gear housing or
cylinder block has recently been replaced. If any of
these components have been replaced, remove and
inspect/replace the component.
2 If the flywheel housing, rear gear housing or cylinder
block have not been recently replaced. Remove the
flywheel housing. Inspect the rear gear housing and
flywheel housing mounting surfaces. If no damage is
found, remove the rear gear housing and inspect the
cylinder block and rear gear housing mounting
surfaces.
If the bore alignment is out of specification:
The ring dowels must be removed and the flywheel
housing repositioned.
Use the dowel pin extractor service tool, Part Number
3163720, to remove the dowel pins from the block.
NOTE: The ring dowels are not required to maintain
concentricity of the housing; the clamping force of the
capscrews holds the housing in place.
After the ring dowels are discarded, install the flywheel
housing on the engine following the Install Step of this
procedure, but do not torque the capscrews. Tighten the
capscrews enough to hold the flywheel housing in place,
but loose enough to allow small movement when struck
lightly with a rubber mallet.
Recheck the bore alignment. When bore alignment is
within specification, tighten the capscrews to the specified
torque value outlined in the Install Step of this procedure.