Usage:
(1) Camshaft gear. If a new gear is required, replace the camshaft assembly.
(2) Diameter of the surfaces (journals) for the camshaft bearings (new) ... 69.850 ± 0.013 mm (2.7500 ± .0005 in)
Bore in front and rear bearings for the camshaft (new) ... 69.969 ± 0.048 mm (2.7547 ± .0019 in)
Bore in the inner bearings for the camshaft (new) ... 69.982 ± 0.061 mm (2.7552 ± .0024 in)
(3) Thickness of thrust plate (new) ... 4.65 ± 0.03 mm (.183 ± .001 in)
End play of the camshaft ... 0.10 to 0.25 mm (.004 to .010 in)
(4) Camshaft.
(5) Height of camshaft lobes.
To find lobe height, use the following procedure:
A. Measure camshaft lobe height (5).
B. Measure base circle (7).
C. Subtract base circle (Step B) from lobe height (Step A). The difference is actual lobe lift.
- a. Exhaust lobe ... 8.783 mm (.3458 in)
- b. Inlet lobe ... 8.100 min (.3189 in)
D. Specified camshaft lobe lift (6) is:
Maximum permissible difference between actual lobe lift (Step C) and specified lobe lift (Step D) is 0.13 mm (.005 in)
Projection of dowel at tapered end (opposite camshaft gear) of camshaft (3408C only) ... 8.76 ± 0.25 mm (.345 ± .010 in)