- Rest the cylinder head on the workbench and use tool
99368544 (1) to apply pressure to spring cups (3) so that
by compressing springs (4) valve collets (2) can be
removed.
Then take off upper cups (3), springs (4), caps (5) and
lower cups (6).
Turn the cylinder head upside down and withdraw valves
(7). Repeat the operation on all the cilinder heads.
Figure 75
CYLINDER HEAD
Hydraulic leak test
Before dismantling the cylinder head, carry out the hydraulic
leak test using the appropriate tool.
Pump water heated to approx. 90˚ C and at a pressure of
4 ÷ 5 bar into the cylinder head. Under these conditions, no
leaks should be found; if they are, replace the cylinder head.
Dismantling valves
Figure 76
Figure 77
Check the flatness of the support surface using a rule and a
feeler gauge.
- Remove carbon deposits from valve using a steel brush.
Check that valves do not show signs of binding or
cracking.
Use a micrometer to check that the valve rod diamter is
as specified (see Figure 79). If not, replace the valves.
Figure 78
Checking the cylinder head support surface
VALVE
Removing carbon deposits, and checking the
valves
82266
103214
16824
18625
34
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
VECTOR 8 ENGINES
Base - April 2006 Print P2D32V001E
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