APPENDIX A – SPECIFICATIONS 437
Table 66 Piston Specifications (cont.)
Piston rings
Top ring - keystone cross section225 bhp and below
Intermediate - rectangular cross
section
Top ring - keystone cross section
230 bhp and above
Intermediate - keystone cross
section
570 piston configuration
Piston crown
Steel crown, two-piece articulated
Piston skirt Aluminum alloy
Piston rings
Top ring – keystone cross sectionAll 570 series engines
Intermediate – rectangular cross
section
466 and 570 piston specifications
466 piston: 0.076 - 0.128 mm
(0.0030 - 0.0050 in)
Running clearance between piston and cylinder sleeve
570 piston: 0.063 - 0.115 mm
(0.0025 - 0.0045 in)
466 piston: 116.44 - 116.49 mm
(4.584 - 4.586 in)
Skirt diameter
570 piston: 116.48 - 116.51 mm
(4.586 - 4.587 in)
Top compression ring groove width, 466 measure over 0.122 gauge
pins
115.90 - 115.68 mm (4.563 -
4.554 in)
Top compression ring groove width, 570 measure over 0.126 gauge
pins
116.74 - 116.50 mm (4.596 -
4.587 in)
Intermediate compression ring groove width (keystone shaped ring)
measure over 0.110 gauge pins
115.92 - 115.73 mm (4.564 -
4.556 in)
Intermediate compression ring groove width (rectangular shaped
ring), 466
3.05 - 3.03 mm (0.120 - 0.119 in)
Intermediate compression rin
g groove width (rectangular shaped
ring), 570
3.05 - 3.03 mm (0.120 - 0.119 in)
Oil control ring, side clearance, 466
0.076 - 0.026 mm (0.0030 -
0.0010 in)
Oil control ring, side clearance, 570
0.080 - 0.030 mm (0.0031 -
0.0012 in)
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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