Detroit Diesel 4000 Series, Service Manual, Page: 322 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 018.05.08 M – INSPECTION AND REPAIR
Perform the following steps to inspect and repair the cylinder block ventilation system:
1. Clean all components.
Diesel fuel is a combustible fluid. Risk of a fire from sparks,
smoking, or open flame is probable.
To avoid personal
injury, perform cleaning of engine components in a well
ventilated work area with access to a fire extinguisher.
2. If oil separator is clogged with stubborn, sticky oil, clean the separator with diesel fuel.
[a] If oil separator cannot be completely cleaned, replace separator as necessary.
[b] If oil separator has been cleaned, continue inspection.
3. Visually inspect components for wear and damage.
[a] If components are worn or damaged, replace as necessary.
[b] If components are not worn or damaged, continue inspection.
4. Visually inspect sealing and mating faces for damage and defects.
[a] If sealing and mating surfaces are damaged or defective, rub down with oilstone.
[b] If damage or defects are beyond repair, replace component as necessary.
[c] If sealing and mating surfaces are not damaged or defective, or can be repaired,
continue inspection.
To avoid an eye injury when blow drying parts, wear
adequate eye protection (safety glasses or faceplate) and
do not exceed 276 kPa (40 lb/in.
2 ) air pressure.
5. Visually inspect pipes and housing for damage.
[a] If pipes or housing are damaged, replace components as necessary.
[b] If pipes and housing are not damaged, continue inspection.
6. Visually inspect pipes and housing for leaks in water bath, using compressed air.
[a] If bubbles are detected, indicating leaks, replace components as necessary.
[b] If no leaks are detected, continue inspection.
All information subject to change without notice.
C -176
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