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231 V6 ENGINE V.I. CODE C
6A3-23
5. Install flywheel. Bolt holes are unevenly spaced so all
flywheel bolts can be installed with flywheel in correct
position. Install bolts and torque to specifications.
6. Mount dial indicator on engine block and check
flywheel run-out at three attaching bosses. Run-out should
not exceed .015". The crankshaft end play must be held in
one direction during this check.
7. If run-out exceeds .O 15", attempt to correct by tapping
high side with mallet. If this does not correct, remove
flywheel and check for burrs between flywheel and crankshaft
mounting flange.
FLYWHEEL OR RING GEAR O N
MANUAL TRANSMISSION
ENGINE
Replacement
1. Remove transmission and clutch assembly, being
certain to mark clutch cover and flywheel so clutch may be
reinstalled in original position.
2. Remove flywheel. Flywheel is located in a
predetermined location on crankshaft by attaching bolts,
which are unevenly spaced.
3. If ring gear is to be replaced, drill a hole between two
teeth and split gear with a cold chisel.
4.
Heat and shrink a new gear in place as follows:
a. Polish several spots on ring with emery cloth.
b. Use a hot plate or slowly moving torch to heat the
ring until the polished spots turn blue (approximately 600"
F. 3 16 " C.). Heating the ring in excess of 800" F. 427" C. will
destroy the heat treatment.
c. Quickly place ring in position against shoulder of
flywheel with chamfered inner edge of ring gear toward
flywheel shoulder. Allow ring to cool slowly until it contracts
and is firmly held in place.
5. Make certain the flywheel and crankshaft flange are
free from burrs that would cause run-out. Install flywheel.
AUTOMATIC TRANSMISSION
FLYWHEEL BALANCE
Clips are available from the Parts Department that will
serve as balance weights for automatic transmission
flywheels. These clips are secured by their clamping pressure
to the flywheel. See Fig. 6A3-49 for clip installation locations.
If a flywheel is found to be out of balance, it can be
corrected in the following manner.
1. Remove lower flywheel housing. Mark the flywheel
at four locations, 90" apart.
2. Install one clip at one of the marked locations. Run
engine with transmission in neutral and note vibration.
a. If vibration increases, remove clip and relocate 180"
from original location.
b. If vibration decreases, install another clip next to the
original.
c. If no change is noted, move clip 90" and recheck.
3. Continue this procedure until a reduction in vibration
is noted. Fine adjustments can be made by moving the clips,
by small increments, to different locations. Be certain that the
tangs on the clip are set in the flywheel. Otherwise, the clip(s)
may shift when the flywheel is turned at high speeds.
Fig.
6A3-49
Automatic Transmission Flywheel Clip
Location
MANUAL TRANSMISSION
FLYWHEEL BALANCE
All manual transmission flywheels are balanced at the
factory by drilling holes at various points on the flywheel
surface.
4
No attempt should be made to balance a
flywheel after the initial factory balance.
HARMONIC BALANCER
If the harmonic balancer is suspected of being a cause
of vibration, it can be checked and/or balanced by following
the outline below:
1. Using a tachometer, determine the engine speed at
which the greatest amount of vibration occurs.
2. Place an amount of body putty or similar material on
the inside surface of the fan driving pulley. Run engine at
critical speed and note vibration.
3. Repeat Step 1 above using varying amounts of putty
at different locations until the vibration is diminished to a
minimum.
4. When point of minimum vibration is found, mark the
nearest hole drilled in the balancer at that point.
5. Cut a piece of 7/16" iron rod approximately 1/2"
long. Use a chisel, upset a small amount of material on the
side of the piece of rod. See Fig. 6A3-50.
6. Install iron rod into hole marked in Step 4.
7. Additional weight should be added (if necessary) in
adjoining holes.
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