Specifications

4M41 ENGINE -
Crank Shaft and Crank Case
11B-25-7
(2) Bend
1) To measure the bend of the crankshaft
22
, support
it at No. 1 journal
C
and No. 5 journal
D
and read
the runout at No. 3 journal
E
.
2) If the reading exceeds the specified service limit,
replace the crankshaft
22
.
Standard value: 0.02 mm or less
Limit: 0.05 mm
NOTE
The bend of the crankshaft
22
is a half of the dial gauge
reading obtained when the crankshaft is rotated on e turn.
3. UPPER CRANKCASE
(1) Top Surface Distortion
If the reading exceeds the specified limit, eliminate
distortion using a surface grinder.
A
: Measuring direction
Standard value: 0.05 mm or less
Limit: 0.1 mm
Caution
The surface grinding of the upper crankcase 29 should
be limited to such an extent that piston protrusions
do not deviate from specified standard value.
(2) Cylinder Inside Diameter
If the cylinder inside diameter exceeds the specified limit,
bore the cylinder to the next oversize.
Standard value: 98.5 - 98.53 mm
Limit: 98.75 mm
A
: Measuring direction in cylinder
(axial direction of crankshaft)
B
: Measuring direction in cylinder
(right angled to crankshaft)
C
: Measuring direction on piston
(right angled to piston pin hole)
Caution
1. If any of the cylinders exceeds the limit, bore all
the cylinders to the next oversize.
2. Irrespective of the cylinder I.D. being within the
specified limit, replace the piston and piston rings
if the cylinder-to-piston clearance deviates from
the standard value.
PWEE9409-D
E
Feb. 2000Mitsubishi Motors Corporation Added
C
E
D
22
A
Cylinder
53.5 mm
20 mm
80 mm
130 mm
A
B
C