Repair manual

41032
60619
Figure 75
Figure 76
Remove valve guides by means of too l 99360143.
Install by means of tool 99360143 equipped wit h part
99360296, which determines the exact installation position
of valve guides into the cylinder heads; if they are not
available, install th e valve guides in the cylinder head so that
they project out by mm 30.8 to 31.2 (Figure 74).
After in stallin g th e valve guides, smooth their holes with
sleeker 99390330.
Check the valve seats (2). Should slight scratches or burns be
found, go over them with a suitable tool (1) acco rding to th e
inclination values sho wn in Figure 74. If it is necessary to
replace them, using the same tool and taking care not to
affect the cylinder head, remove as much material as possible
from t he valve seats so that, with a punch, it is possible to
extract them from the cylinder head.
Heat the cylinder head to 80 — 100°Cand,usingadrift,fitin
the new valve seats (2), chilled beforehand in liquid nitrogen.
Using tool (1), regrind the valve seats acc o rding to the angles
showninFigure73.
After regrinding the valve seats, using t ool 99370415 and dial
gauge 99395603, ch eck that the position of the valves in
relation to the plane of the cylinder head is:65
- -0.65 - -0.95 mm (recessing) intake valves
- -18 - -2.1 mm (recessing) exhaust valves.
To replace th e injector case (2), act as follows:
- thread the case (2) with tool 99390804 (1).
Carry ou t operation s described in figs. 77 - 80 - 81 - 82 by
fixing too ls to the cy lin der head by means of braket A.
Replacing of valve guides
Replacing injector cases
Removal
Replacing - Reaming the valve seats
To replace the valve seats, remove them using the
appropriate tool.
Valve seats must be reamed whenever valves or
valve guides are replaced or grou nd.
NOTE
36
SECTION 4 - OVERHAUL AND TECHNICAL SPECIFICATIONS
F3C CURSOR ENGINES
Base - May 2007 Print P2D32C005 E