4G9 ENGINE |
Timing belt side
Manufacturing date
Check digit
No. 1
No. 2
No. 3
No. 4
Cylinder bore size mark
D C
Connecting rod
Piston pin
Piston
BA
3 mm + L
Guide B | Guide A |
INSTALLATION SERVICE POINTS
"AAPISTON PIN INSTALLATION
(1)When replacing a piston, read off the cylinder bore size mark on the cylinder block as illustrated, and select a piston of proper size according to the following table.
Cylinder bore size | Piston class | Piston size mark |
mark |
|
|
|
|
|
A | A | A |
|
|
|
B | B | None |
|
|
|
C | C | C |
|
|
|
NOTE
The piston size mark shows on the top of the piston.
(2)Measure the following dimensions of the piston, piston pin and connecting rod.
A:Piston pin insertion hole length
B:Distance between piston bosses
C:Piston pin length
D:Connecting rod small end width
(3)Calculate the following formula by substituting the measured value.
L = ((A – C) – (B – D))/2
(4)Insert the Push Rod (special tool) into the piston pin and attach the guide A to the push rod end.
(5)Assemble the connecting rod in the piston with their front marks facing the same direction.
(6)Apply engine oil to the entire periphery of the piston pin.
(7)Insert the piston pin, push rod and guide A assembly having assembled in step (3) from the guide A side into the piston pin hole on the front marked side.
(8)Screw the guide B into the guide A until the gap between both guides amounts to the value L obtained in step
(3) plus 3 mm.
EMitsubishi Motors Corporation | Apr. 2003 | Revised |