TM 10-3950-672-24-2
Part or Assembly
Ref. Point
mm
in
Cylinder Head Deck Flatness
Overall Flatness, end to end and side to
0.75
MAX
[0.003]
side
Valve Seats
Grinding cleanup
0.254
MAX
[0.010]
Cylinder Head Cracks - Reuse Guidelines
These guidelines apply only to cracks extending from the injector bore to the intake valve seats.
Replace cylinder heads which exhibit valve bridge cracks in any other location.
The reuse guidelines for a cylinder head with a crack extending from the injector bore to the intake
valve seat are as follows:
If the crack does not extend into the valve seat, the head is reusable.
If the crack extends into or through the valve seat, the head must be repaired by installing a valve
seat insert per the Alternative Repair Manual, Bulletin No. 3810234.
Valve Springs
Valve spring measurements.
Approx. Free Length 55.63 mm [2.190 in.]
Inclination:
1.0
MAX
[0.039]
A load of 289.13 - 321.16 N. [65.0 - 72.2 lb] is required to compress the spring to a height of 49.25
mm [1.94 inches].
5-359