Specifications

4M41 ENGINE -
Piston and Connecting Rod
11B-23-10
(2) Connecting Rod Bearing-to-Crankshaft Clearance
(Oil clearance)
1) Fit the lower connecting rod bearing shell
2
and upper
connecting rod bearing shell
4
in the connecting rod
cap
3
and the piston an d connecting rod assembly
5
, respectively. Tighten the nuts
1
to a torque of 49
± 5 Nm.
2) Measure the I.D. of the connecting rod bearing
2
,
4
and the pin O. D. at
A
of the crankshaft
*a
.If
the readings exceed the specified limit, replace the
defective part(s).
Standard value: 0.03 - 0.05 mm
Limit: 0.1 mm
3) When the connecting rod bearing
2
,
4
is replaced
with an undersize bearing, adjust the pin O.D. of
the crankshaft
*a
to the specified undersize
dimension.
2. PISTON RING
(1) Piston Ring End Gap
1) Place the piston ring
6
,
7
,
8
level in the cylinder
F
of the upper crankcase using the crown of the piston
11
.
2) Holding t he piston ring
6
,
7
,
8
in place, measure
its end gap with a feeler gauge
G
. If the reading
exceeds the specified limit, replace the piston ring.
Standard value:
1st compression ring 0.3 - 0.45 mm
2nd compression ring 0.4 - 0.55 mm
Oil ring 0.3 - 0.5 mm
Limit: 0.8 mm
Caution
1. To place the piston ring 6, 7, 8 level in the
cylinder F, be sure to use the piston 11.
2. Place the piston ring 6, 7, 8 at the lower part
of the cylinder F where the cylinder wall wears
less than elsewhere.
3. When it becomes necessary to replace any
of the piston rings 6, 7 and 8, replace all of
them as a set.
PWEE9409-D
E
Feb. 2000Mitsubishi Motors Corporation Added
2
3
4
5
1
*a
A
11
6, 7, 8
F
G