154 CYLINDER HEAD AND VALVE TRAIN
Specifications
Tab le 13 Valve Spec ifications
Intake: 6.68 mm (0.263 in)
Camshaft lobe lift
Exhaust: 6.91 mm (0.272 in)
Intake: 59.75 - 60.00°Valvefaceangle
Exhaust: 44.75 - 45.00°
Intake: 1.32 mm (0.052 in)Valve face margin (min.)
Exhaust: 1.16 mm (0.046 in)
Valve face-to-valve stem runout (max.) 0.038 mm (0.0015 in)
Valve lash (cold), intake and exhaust 0.48 mm (0.019 in)
Valve stem diameter (new condition) Intake: 7.928 ± 0.0089 mm (0.3121 ± 0.00035
in)
Exhaust: 7.908 ± 0.0089 mm (0.3113 ± 0.00035
in)
Valve stem-to-valve guide clearance (max.) Intake: 0.10 mm (0.004 in)
Exhaust: 0.11 mm (0.005 in)
Table 14 Valve Spring Specifications
Intake and Exhaust Valve Springs
Free length
52.35 mm (2.061 in)
Solid height (max.) 27.43 mm (1.080 in)
40 mm (1.575 in)Valve closed test length @ 410.1 ± 24.
5 N (92.2 ± 5.5
lbf) test load
29.3 mm (1.155 in)Valve closed test length @ 764.2 ± 48.9 N (171.8 ±
11.0 lbf) test load
Table 15 Cylinder Head Specifications
Cylinder head gasket surface flatness 0.10 mm (0.004 in.) per 229 mm (9.0 in)
New: 160.48 mm (6.318 in)Cylinder head thickness
Minimum: 159.97 mm (6.298 in)
Standard: 37.503 ± 0.003 mm (1.477 ± 0.001 in)
Exhaust valve seat insert co
unterbore diameter
Oversize: 0.05 mm (0.00 2 i
n) 37.55 ± 0.03 mm
(1.478 ± 0.001 in)
Standard: 37.56 mm (1.479 in)
Exhaust valve seat outside diameter
Oversize: 0.05 mm (0.002 in) 37.61 mm (1.481 in)
Standard: 33.50 ± 0.03
mm (1.319 ± 0.001 in)
Intake valve seat insert counterbore diameter
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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