Dakota 4WD V8-4.7L VIN J (2007)
Flywheel: Testing and Inspection
FLYWHEEL
Check flywheel runout whenever misalignment is suspected. Flywheel runout should not exceed 0.08 mm (0.003 in.). Measure runout at the outer edge
of the flywheel face with a dial indicator. Mount the indicator on a stud installed in place of one of the flywheel bolts.
Common causes of runout are:
-
heat warpage
-
improper machining
-
incorrect bolt tightening
-
improper seating on crankshaft flange shoulder
-
foreign material on crankshaft flange
Flywheel machining is not recommended. The flywheel clutch surface is machined to a unique contour and machining will negate this feature. However,
minor flywheel scoring can be cleaned up by hand with 180 grit emery, or with surface grinding equipment. Remove only enough material to reduce
scoring (approximately 0.001 - 0.003 in.). Heavy stock removal is not recommended. Replace the flywheel if scoring is severe and deeper than 0.08
mm (0.003 in.). Excessive stock removal can result in flywheel cracking or warpage after installation; it can also weaken the flywheel and interfere with
proper clutch release.
Clean the crankshaft flange before mounting the flywheel. Dirt and grease on the flange surface may cock the flywheel causing excessive runout. Use
new bolts when remounting a flywheel and secure the bolts with Mopar(R) Lock And Seal. Tighten flywheel bolts to specified torque only.
Overtightening can distort the flywheel hub causing runout.
