Detroit Diesel 4000 Series, Service Manual, Page: 57 / 2706

SERIES 4000 12/16V SERVICE MANUAL
Valve Timing
See Figure 6 for valve timing with valve clearance adjusted.
1 — Inlet valve opens; crank angle 42.6 degrees before TDC
2 — Inlet valve closes; crank angle 66.6 degrees after BDC
3 — Exhaust valve opens; crank angle 57.6 degrees before BDC
4 — Exhaust valve closes; crank angle 30.4 degrees after TDC
5 — Overlap; crank angle 73 degrees
6 — Start of delivery; map based
I — TDC (top dead center)
II — BDC (bottom dead center)
Figure 6 Valve Timing Diagram
Camshaft and Valve Lift
Listed in Table 4 are the camshaft and valve lifts for camshaft adjustment.
Operation Inlet Exhaust
Camshaft lift at TDC 1.43 mm (0.056 in.) 1.43 mm (0.056 in.)
Valve lift at TDC (zero valve clearance) 2.00 mm (0.07874 in.) 2.00 mm (0.07874 in.)
Table 4 Camshaft and Valve Lift
All information subject to change without notice.
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