Detroit Diesel 4000 Series, Service Manual, Page: 695 / 2706

SERIES 4000 12/16V SERVICE MANUAL
3. Slightly tighten locknuts.
NOTE:
To obtain valid measurements, ensure that there is no valve play.
4. Mount magnetic-base indicator holder with dial gage on cylinder A1.
5. Position dial gage stylus, with low preload, on valve bridge of inlet valve; set scale to zero.
6. Slowly turn crankshaft further in direction of engine rotation 360 degrees, to exactly
overlap TDC in accordance with applied mark.
7. Read valve stroke dial gage and record readings in Data Sheet.
8. Position dial gage stylus on valve bridge of exhaust valve; set scale to zero.
9. Further turn crankshaft slowly in direction of engine rotation, until pointer of dial gage
no longer moves.
10. Read valve stroke from dial gage and record readings in Data Sheet.
[a] If readings are outside limits, machine as necessary.
[b] If correct limits cannot be obtained by machining, replace component.
[c] If readings are not outside limits, continue to next step.
11. Remove magnetic-base indicator holder with dial gage and TDC indicator.
12. Set valve clearance on cylinder A1. Refer to section C 051.05.11.
All information subject to change without notice.
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