ENGINE UNIT
EM-121
< UNIT DISASSEMBLY AND ASSEMBLY >
[VQ40DE]
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• Measure the outer diameter (d) at position shown.
• If the reduction appears in a position other than (d), regard it as (d).
• When (d) exceeds the limit (when it becomes thinner), replace
connecting rod bolt with new one.
FLYWHEEL RUNOUT (M/T MODELS)
NOTE:
• This inspection is for double mass flywheel only.
• Do not disassemble the double mass flywheel.
Flywheel Deflection
• Measure the deflection of the flywheel contact surface to the clutch
with a dial gauge.
• Measure the runout at 210 mm (8.27 in) diameter.
• When measured value exceeds the limit, replace the flywheel with
a new one.
MOVEMENT AMOUNT OF FLYWHEEL (M/T MODELS)
CAUTION:
Do not disassemble double mass flywheel.
Movement Amount of Thrust (Fore-and-Aft) Direction
• Measure the movement amount of thrust (fore-and-aft) direction when 100 N (10.2 kg, 22 lb) force is added
at the portion of 125 mm (4.92 in) radius from the center of flywheel.
• If measured value is out of the standard, replace flywheel.
Movement Amount in Radial (Rotation) Direction
Check the movement amount of radial (rotation) direction with the following procedure:
1. Install a bolt to clutch cover mounting hole, and place a torque wrench on the extended line of the flywheel
center line.
• Tighten bolt at a force of 9.8 N·m (1.0 kg-m, 87 in-lb) to keep it from loosening.
2. Put a mating mark on circumferences of the two flywheel
masses without applying any load (Measurement standard
points).
3. Apply a force of 9.8 N·m (1.0 kg-m, 87 in-lb) in each direction,
and mark the movement amount on the mass on the transmis-
sion side.
4. Measure the dimensions of movement amounts (A) and (B) on
circumference of flywheel on the transmission side.
• If measured value is out of the standard, replace flywheel.
DRIVE PLATE (A/T MODELS)
Limit : 7.75 mm (0.3051 in)
PBIC0912E
Limit : 0.45 mm (0.0177 in) or less
PBIC2168E
Standard : 1.3 mm (0.051 in) or less
Standard: 44.3 mm (1.744 in) or less.
PBIC1263E
Revision: January 2013 2013 Xterra
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