Detroit Diesel 4000 Series, Service Manual, Page: 633 / 2706

SERIES 4000 12/16V SERVICE MANUAL
[a] If indentations, flatness, burring or deformation is found, replace valve springs
as necessary.
[b] If no indentations, flatness, burring or deformation is found, continue inspection.
3. Inspect valve spring (2) with valve spring test device (1). See Figure 365.
1. Valve Spring Test Device 2. Valve Spring
Figure 365 Inspecting Valve Springs
4. Measure valve springs.
[a] If limit values are exceeded, replace valve spring as necessary.
[b] If limit values are not exceeded, continue inspection.
Externally Correcting Valve Seat
Perform the following steps to the externally correcting valve seat:
All information subject to change without notice.
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