Detroit Diesel 4000 Series, Service Manual, Page: 1435 / 2706

SERIES 4000 12/16V SERVICE MANUAL
To avoid personal injury, use care when dealing with fluids
under pressure. Fluids under pressure have enough force
to penetrate the skin. These fluids can cause a minor cut
or opening in the skin. If injured by escaping fluid, see a
doctor immediately. Serious infection or adverse reaction
to the fluid can result if not treated immediately.
11. Pressure-test cooling system with water at 80 C for one hour.
NOTE:
Test pressure with water is 5 bar; test pressure with air is 1.3 bar.
12. Inspect all coolant-retaining components for leaks.
[a] If leaks are found, replace components as necessary.
[b] If no leaks are found, continue inspection.
13. Release test pressure.
14. Drain system.
15. Remove removal tool.
16. Reinstall plugs.
17. Reinstall properly-treated engine coolant as per Operators Guide
All information subject to change without notice.
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