Chrysler 2005 Crossfire SRT6 Service Manual page 521

ZH
CLUTCH MISALIGNMENT
Clutch components must be in proper alignment with the crankshaft and transmission input shaft. Misalignment
caused by excessive runout or warpage of any clutch component will cause grab, chatter and improper clutch
release.
CLUTCH COVER AND DISC RUNOUT
Check the clutch disc before installation. Axial (face) runout of a new disc should not exceed 0.50 mm (0.020 in.).
Measure runout about 6 mm (1/4 in.) from the outer edge of the disc facing. Obtain another disc if runout is exces-
sive.
Check condition of the clutch before installation. A warped cover or diaphragm spring will cause grab and incom-
plete release or engagement. Be careful when handling the cover and disc. Impact can distort the cover, diaphragm
spring, release fingers and the hub of the clutch disc.
Use an alignment tool when positioning the disc on the flywheel. The tool prevents accidental misalignment which
could result in cover distortion and disc damage.
A frequent cause of clutch cover distortion (and subsequent misalignment) is improper bolt tightening.
FLYWHEEL RUNOUT
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.
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 machin-
ing will negate this feature. 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 0.076 mm (0.003 in.).
Excessive stock removal can result in flywheel cracking or warpage after installation; it can also weaken the fly-
wheel and interfere with proper clutch release.
Clean the crankshaft flange before mounting the flywheel. Dirt and grease on the flange surface may cause exces-
sive runout. Use new bolts when remounting a flywheel and secure the bolts with Mopar Lock And Seal or equiv-
alent. Tighten flywheel bolts to specified torque only. Overtightening can distort the flywheel hub causing runout.
CLUTCH 6 - 3