Detroit Diesel MBE 4000 Service Manual page 165

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1. Piston
Figure 1-90
3. Clean all the carbon from the ring grooves. Be sure the grooves are not damaged, and that
there are no burrs or combustion residue in the grooves.
4. Before installing the new rings, check the end gap. The correct end-gap measurements
are listed in Table 1-26.
Ring Designation
Keystone
Taper-Faced with Internal
Angle
Double-Chamfered Oil
Control with Garter Spring
Table 1-26
NOTE:
Check the end gap of the upper two piston rings first. The garter spring must be removed
from the third (lowest) piston ring before you can measure its end gap.
All information subject to change without notice.
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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Removing the Piston Rings
Groove
I
II
III
Piston Ring End-Gap Dimensions
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MBE 4000 SERVICE MANUAL
2. Ring Pliers
Gap When New, mm
(inch)
0.45 to 0.60
(0.018 to 0.024)
0.40 to 0.55
(0.016 to 0.022)
0.40 to 0.55
(0.016 to 0.022)
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Maximum End Gap, mm
(inch)
1.0 (.039)
1.0 (.039)
1.0 (.039)
1-117
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