Specifications

4M41 ENGINE -
Piston and Connecting Rod
11B-23-6
(2) Apply a thin coat of engine oil to the piston pin
10
prior
to insertion. Assemble the connecting rod
12
and piston
11
facing in the directions shown.
“1”
: Connecting rod identification mark
“
¬
”
: Front mark
NOTE
To make the piston pin
10
easy to install, warm t he piston
11
over an appropriate heater or in hot water if necessary.
Caution
After inserting the piston pin 10, check to ensure
that the piston moves smoothly with little play.
"
D
A
PISTON RING INSTALLATION
(1) Install the oil ring
8
onto the piston
11
with its end gap
positioned at
A
and the abutting end of the expander
spring at
B
as shown.
(2) Install the compression rings
6
,
7
onto the piston
11
,
with their manufacturer’s mark
C
(stamped near the end
gap) facing upward and their e nd ga p
D
,
E
positioned
as shown.
D
: End gap of 1st compression ring
E
: End gap of 2nd compression ring
“
¬
”
: Front mark
"
E
A
PISTON AND CONNECTING ROD ASSEMBLY
INSTALLATION
Caution
Before installing the piston and connecting rod assembly
5, check the head of the nut 1 for punch marks. The
number of punch marks corresponds to the number of
times the mating connecting rod bolt has been tightened
to the plastic area (bolts with two punch marks or less
are reusable). If there are three (the evidence of having
been tightened 3 times), replace both the nut 1 and the
connecting rod bolt B.
(1) Check that the end gaps of the piston rings
C
are in
position.
(2) Check that the size marks
D
on the pistons are the same
as the respective marks on the upper crankcase.
(3) Sheathe the connecting rod bolt
B
with a vinyl hose
E
so as not to damage the cylinder inside surface of the
upper crankcase
*b
and the pin of the crankshaft assembly
*a
.
PWEE9409-D
E
Feb. 2000Mitsubishi Motors Corporation Added
9
10
11
12
“1”
“
¬
”
“
¬
”
A
B
C
E
D
11
6, 7
A
14
5
1
C
*b
D
5
B
E
*a