Removal Procedure
Tools Required
• | J 7872 Magnetic
Base Indicator Set |
- Remove the manual transmission assembly from the vehicle. Refer
to
Transmission Removal
in
Manual Transmission.
- Install the J 35271
to the engine block in order to hold
the flywheel stationary (2).
- Install J 37761
to support the clutch disc during the
pressure plate removal.
- Slowly loosen the six pressure plate cover bolts (1) evenly until
the pressure plate diaphragm spring tension is completely released.
- Remove the six pressure plate cover bolts (1) and the pressure
plate assembly from the flywheel.
- Remove the clutch disc and the J 37761
from the flywheel.
- Remove the J 35271
from the engine block.
- Measure the flywheel (1)
for runout using the J 7872
and slowly turning the flywheel (1) using a flywheel wrench. If the flywheel
runout exceeds 0.1 mm (0.004 in), the flywheel (1) must be
resurfaced or replaced.
Important: The flywheel should be indexed (reference marked) before removal to
ensure correct installation. If the flywheel is installed in a position other
than the one from which it was removed, poor engine balance may result.
- Remove six flywheel bolts and the flywheel (1) from the crankshaft noting
the flywheel position on the crankshaft.
Important: DO NOT use alcohol-based solvents or other cleaning agents on the clutch
disc. Using solvents on the clutch disc may cause slipping and premature clutch
wear.
- Clean the flywheel and pressure plate-to-clutch disc mating surfaces
of all oil, grease and metallic particles.
- Clean the clutch disc using a clean, dry cloth.
- Inspect the flywheel and pressure plate for:
• | Grooves and excessive wear |
• | Bent or broken pressure plate fingers |
• | Weak or damaged diaphragm spring |
• | If any of the above conditions exist, do not attempt to disassemble
or repair the pressure plate assembly. If the flywheel or pressure plate appears
excessively worn, replace the flywheel and/or pressure plate as necessary. |
- Inspect the pilot bearing for smooth rotation. If the bearing
does not spin freely, replace the pilot bearing. Refer to
Clutch Pilot Bearing Replacement
.
- Inspect the clutch disc for:
• | Damaged or weak torsional springs |
- Measure the clutch disc
wear using the J 26900-5
and measuring the depth of each rivet head (2) depression. Standard rivet
head (2) depth should measure 1.6 mm (0.06 in). If the clutch
rivet (2) depth is less than 0.5 mm (0.02 in), replace the
clutch disc (1).
- Measure the clutch disc
(1) for runout using the J 7872
. Place the disc (1) between two horizontal arbors and turn slowly
while measuring runout. If clutch disc runout exceeds 0.8 mm (0.031 in),
replace the clutch disc (1).
Installation Procedure
Tools Required
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the flywheel
to the crankshaft aligning index marks made during removal; secure the flywheel
with six flywheel bolts.
Tighten
Tighten the flywheel bolts to 78 N·m (56 lb ft).
- Install the J 35271
to the engine block in order to hold
the flywheel stationary.
Important: When installing the clutch disc, make sure the torsional springs are
offset to the rear facing the transmission.
- Install the clutch disc
to the flywheel using the J 37761
to center the disc on the flywheel and support the disc in place.
- Install the pressure plate to the flywheel; secure the pressure
plate with six pressure plate cover bolts (1).
Tighten
Tighten the six pressure plate bolts evenly in a diagonal pattern to
prevent clutch disc distortion. Then, tighten the six bolts in the same diagonal
pattern to 23 N·m (17 lb ft).
- Remove the J 35271
from the engine block and the J 37761
from the clutch disc.
- Lubricate the transmission input shaft splines and the clutch
release bearing with a thin coat of wheel bearing lubricant GM P/N 1051344,
or the equivalent.
- Lubricate the pilot bearing with a thin coat of wheel bearing
lubricant GM P/N 1051344, or the equivalent.
- Install the manual transmission assembly into the vehicle. Refer
to
Transmission Installation
in
Manual Transmission.