SERVICE MANUAL
CONNECTING RODS, PISTONS, RINGS & SLEEVES
Section 5
SPECIFICATIONS
Late Model with Old Full Keystone
Ring with Narrow Gap** ................................................................................................................0.51 mm (0.020 in.)
0.84 mm (0.033 in.)
Late Model with New Full Keystone
Ring with Wide Gap** ............................................................................................................1.65 mm (0.065 in.)
1.98 mm (0.078 in.)
PISTON RINGS - OIL CONTROL:
Number of Rings Per Piston ...................................................................................................................................... 1
Type
................................................................................................................. One Piece Slotted - Chrome
Ring Gap
(300 Series) ...........................................................................................................................0.25 mm (0.010in.)
0.58 mm (0.023 in.)
(400 Series)
...............................................................................................................................0.25 mm (0.010 in.)
0.71 mm (0.028 in.)
PISTON PINS:
Diameter
..............................................................................................................................41.270 mm (1.6248)
41.275 mm (1.6250)
Length:
(300 Series) ........................................................................................................................76.07 mm (2.995 in.)
76.33 mm (3.005 in.)
(400 Series) ........................................................................................................................89.03 mm (3.505 in.)
89.28 mm (3.515 in.)
Clearance in Rod ......................................................................................................................0.015 mm (0.0006 in.)
0.054 mm (0.0010in.)
Maximum Permissible Clearance in Rod,
before replacing ....................................................................................................................0.08 mm (0.003 in.)
Clearance in Piston ..................................................................................................................0.013 mm (0.0005 in.)
0.025 mm (0.0010in.)
Maximum Permissible Clearance in Piston,
before replacing.................................................................................................................0.064 mm (0.0025 in.)
**Rings with wide gaps and narrow gaps can be intermixed in service.
***Maybe used with old on new piston. New full keystone ring with wide gap must not be used with crankcase mounted
ventillation system.
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 7
