MOTO GUZZI California EV V1100, Service Station Manual

Page: 86 / 173

•
Lubricate the valve guide.
•
Fit the circlips.
•
Press a punch with the valve guides.
•
Use a reamer to bore the holes the
valve stems slide through so that the
inside diameter is at the prescribed val-
ue. The interference between the seat
on the head and the valve guide must
be 0.046 - 0.075 mm (0.0018 - 0.0030
in)
VALVE AND GUIDES COUPLING DATA CHART (INLET)
Specification Desc./Quantity
Valve guide inside diameter mm (in) 8.000 - 8.022 (0.3150 - 0.3158)
Valve stem diameter 7.972 - 7.987 (0.3139 - 0.3145)
Fitting clearance mm (in) 0.013 - 0.050 (0.0005 - 0.0020)
VALVE AND GUIDES COUPLING DATA CHART (OUTLET)
Specification Desc./Quantity
Valve guide inside diameter mm (in) 8.000 - 8.022 (0.3150 - 0.3158)
Valve stem diameter mm (in) 7.965 - 7.980 (0.3136 - 0.3142)
Fitting clearance mm (in) 0.025 - 0.057 (0.0010 - 0.0022)
Checking the cylinder head
Check that:
•
The planes of contact with the cover and with the cylinder are not scored or damaged so as
to compromise a perfect seal.
•
Check that the clearance between the valve guide holes and valve stanchions is within the
prescribed limits.
•
Check the status of the valve seats.
The valve seats should be reamed with a mill. The
seat inclination angle is 45° +/- 5'. After milling, it
is necessary to grind them to ensure a good cou-
pling and a perfect sealing between the ring nuts
and the valve heads.
Engine
California EV V1100
ENG - 86