SERVICE MANUAL
CONNECTING RODS, PISTONS, RINGS & SLEEVES
Section 5
SPECIFICATIONS
DIMENSIONS
CONNECTING RODS:
Skirt Clearance, Measured 90 degrees from pin hole at bottom of skirt.
300 Series ........................................................................................................................0.114 mm (0.0045 in.)
0.165 mm (0.0065 in.)
400 Series .........................................................................................................................0.114 mm (0.0045 in.)
0.190 mm (0.0075 in.)
Number of Rings Per Piston ................................................................................................................................................... 3
Piston Ring Groove Widths:
300 Series
Top Compression Ring - Measure over 0.1150 in. gauge pins ......................................3.8898 in. Upper Limit
(Full Keystone) ..................................................................................................... 3.8574 in. Replacement Limit
400 Series
Top Compression Ring - Measure over 0.1150 in. gauge pins ......................................4.3118 in. Upper Limit
(Full Keystone) ..................................................................................................... 4.2794 in. Replacement Limit
300 Series and 400 Series N.A.
Intermediate Compression Ring - (Rectangular) ......................................................................... Use Side Clearance
and ring gap dimensions
as criteria for determining
piston groove wear.
Early Model 400 Series T.C.
Intermediate Compression Ring - Measured over 0.0900 in. gauge pins
(Half Keystone) DT-414, DT-436 and DT-466 ........................................................................4.3244 in. Upper Limit
4.2793 in. Replacement Limit
Late Model 400 Series T.C.
Intermediate Compression Ring - Measure over 0.1150 in. gauge pins
(Full Keystone)
Effective on: DT-414 S/N 118710*, DT-436 S/N 63636*
DT-466 S/N 38089*, DT-414B, DT-436B, DT/DTI-466B and DT/DTI-466C
S/N 76440* ......................................................................................................................4.3168 in. Upper Limit
4.2844 in. Replacement Limit
Side Clearance:
Oil Control Ring -D-312, D and DT-360 ................................................................................................0.038 mm (0.0015 in.)
0.102 mm (0.0040 in.)
Oil Control Ring - D and DT-414, D and DT-436
DT-466, DT/DTI-466B and DT/DTI-466C .....................................................................................0.05 mm (0.002 in.)
0.10 mm (0.004in.)
* Starting with these engine Serial Numbers and above.
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
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