Detroit Diesel 4000 Series, Service Manual, Page: 639 / 2706

SERIES 4000 12/16V SERVICE MANUAL
6. Replace valve guide if necessary.
7. Check inner diameter of valve guide with bore gage. See Figure 369.
1. Plug Gage, Design A
Figure 369 Checking Valve Guide Inner Diameter
[a] If diameter is outside limits, replace valve guide.
[b] If diameter is not outside limits, continue to next step.
NOTE:
Instead of bore gage, a plug gage (version A) may also be used. Nominal diameter of
plug gage: 11.009 ± 0.009. Length of go-end: 103 mm (4.0551 in.). Go-end plug gage
must move easily through the whole valve guide. No-go-side plug gage must not rub.
Installing Cap Plug
Perform the following steps to install cap plug:
All information subject to change without notice.
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