Refacing The Valves; Checking Valve Centering; Checking Clearance Between Valve Stem; Valve Guides - Iveco VECTOR Series Technical And Repair Manual

VECTOR 8 ENGINES

Refacing the valves

Figure 79
B
A. Intake valve on the engines with serial numbers starting up
to 484 - B. Intake valve on the engines with serial numbers
starting from 485
- Check with a micrometer that the diameter of the valve
stems is as indicated; if necessary, rebore the seats on the
valves with the grinding machine, removing as little material
as possible.
After machining, check that the dimensions come within
the permissible tolerance.

Checking valve centering

Figure 80
These checks are carried out using a magnetic support dial
gauge which is positoned as shown in the figure above.
By rotating the valve check that the centering error does not
exceed 0.03 mm.
Print P2D32V001E
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS

Checking clearance between valve stem

Figure 81
These checks are carried out using a magnetic support dial
gauge which is positoned as shown in the figure above.
The mounting clearance is from 0.045 to 0.070.

VALVE GUIDES

Figure 82
A
103185
89766
MAIN DATA OF THE VALVE SEATS AND VALVE GUIDE
SEATS ON THE CYLINDER HEADS
A = INLET — S = EXHAUST
35
89832
83492
Base - April 2006