Detroit Diesel 4000 Series, Service Manual, Page: 787 / 2706

SERIES 4000 12/16V SERVICE MANUAL
Inspecting Valve Clearance in Two Positions
Perform the following steps to inspect valve clearance in two crankshaft positions:
1. If swing arms on cylinder A1 are unloaded, the piston is in firing TDC. See Figure 486.
Figure 486 Inspecting Valve Clearance in Two Crankshaft Positions
2. If swing arms on cylinder A1 are loaded, the piston is in overlap TDC.
3. Check all valve clearances at two crankshaft positions (firing TDC and overlap TDC,
cylinder A1) in accordance with Figure .
4. Turn crankshaft in direction of engine rotation.
5. 1 = Firing TDC at cylinder A1; 2 = Overlap TDC at cylinder A1; X = Exhaust value; 0
= Inlet valve.
All information subject to change without notice.
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