Mitsubishi 4g63 Service Manual page 58

11D-58
>>B<< OIL RING INSTALLATION
Upper
side
rail
end gap
Spacer end gap
1. Fit the oil ring spacer into the piston ring groove.
Install the upper side rail, then the lower side rail.
NOTE: Locate the side rail and spacer end gaps
as shown in the drawing.
NOTE: New spacers and side rails are an
identified by color marks as follows:
Size
Standard
0.50 mm oversize
1.00 mm oversize
CAUTION
Use of ring expander to expand the side rail end
gap can break the side rail, unlike other piston
rings.
Side rail end
2. To install each side rail, first fit one end of the rail
into the piston groove, then press the remaining
portion progressively into position by finger as
shown in the drawing.
3. Make sure that the installed side rails move
smoothly in either direction.
ENGINE OVERHAUL <4G63-Turbo>
PISTON AND CONNECTING ROD
Lower
side
rail
end gap
AK202879 AB
Color mark
No mark
Red
Yellow
AK202785 AB
>>C<< PISTON RING NO. 2/PISTON RING
NO. 1 INSTALLATION
Identification mark
Using a piston ring expander, install the piston rings
with their identification marks facing up (toward the
piston crown).
Identification marks:
No.1 ring: 1R
No.2 ring: 2R
NOTE: Each of the available piston rings has a size
mark as follows:
Size
Standard No. 1 ring No mark (white paint on
No. 2 ring No mark
0.50 mm oversize
1.00 mm oversize
Piston ring
expander
AK202786 AC
Size marks
No. 1
No. 2
AK202807 AB
Size mark
periphery)
50
100