Cylinder Block, Liners, Pistons, and Rods
02
030
20
RG,RG34710,114 –19–01NOV00–1/2
Disassemble Piston/Rod Assembly and
Clean Piston
RG8400 –UN–22MAY98
Removing Piston Pin Snap Ring
NOTE: Piston and ring sizes differ between engines.
Piston part numbers are marked on top of pistons
for identification.
Early Engines
Engine Piston Ring Size
10.5 L RE52836, RE504801 4 mm
12.5 L RE66125 4 mm
Later Engines
10.5 L RE504343 3 mm
12.5 L RE503969, 3 mm
RE505901
1. If necessary, check piston ring end gap prior to
removing rings.
Specification
No. 1 Piston Compression Ring
(4-mm Rings)—End Gap 0.43—0.69 mm (0.017—0.027 in.).....................
No. 2 Piston Compression Ring
(4-mm Rings)—End Gap 1.01—1.27 mm (0.040—0.050 in.).....................
No. 1 Piston Compression Ring
(3-mm Rings)—End Gap 0.48—0.74 mm (0.019—0.029 in.).....................
No. 2 Piston Compression Ring
(3-mm Rings)—End Gap 1.35—1.65 mm (0.053—0.065 in.).....................
2. Remove piston snap rings. Remove piston pin and
connecting rod from piston.
NOTE: Discard snap rings. DO NOT reuse.
Continued on next page
CTM100 (06APR04)
02-030-20
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=160
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