TIMING, GEAR TRAIN & FRONT COVER
Inspect the Vibration Damper as follows:
Vibration Damper with Rubber Insert -
Visually inspect for abrasion, cracking or tearing
of rubber at the inner or outer diameter of the
Replace the damper if the cavity depth is 3
mm (0.12 in.) or more through 360.
Replace the damper if voids 6.35 mm (0.25
in.) deep through 900 are found.
Inspect alignment of Inertia Member (outer Iron
Ring) with Hub:
Locate alignment marks (made with a
punch or chisel) on MOST "RUBBER" dampers.
Measure the movement between the hub
and the inertia member.
The marks normally fall on a radial line from
the center of the damper hub. If more than
1.5 mm (0.06 in.) misalignment is found,
replace the damper.
Measure wobble on the front face of the inertia
member as described earlier in this section.
Inspect Vibration Damper
The viscous type vibration damper consists of an inertia
mass (flywheel) enclosed in a fluid-tight housing but
separated therefrom by a thin wall of viscous fluid
(silicone oil). Any movement of the inertia mass,
therefore, is resisted by the friction of the fluid; which
tends to dampen excessive torsional vibrations in the
Damper failure can lead to a broken crankshaft and
extensive engine damage. Certain guidelines can be
followed which will diminish the chance of damper
Check the viscous damper visually for:
DENTS-Even small dents can cause the
inertia mass (flywheel) which floats in
silicone fluid to contact the outer housing.
malfunction. Replace dented dampers.
inspect for silicone fluid leaks. Such leaks
can possibly occur at cracks or seam
openings in housing. Replace damper if
any leaks are found.
NOTE: The damper cannot be repaired.
Check for housing distortion with a micrometer
Remove paint off damper at the four points
shown in Figure 19.
Measure depth of damper housing at each
If any of the points (A, B, C, D) vary more
than .002 in., it is necessary to replace the
NOTE: Housing distortion can result in damper
leakage or improper damper functioning if outer
housing contacts inertia mass (flywheel).
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