3
Place a suitable socket over the valve/valve guide
and carefully tap the valve seat out.
IMPORTANT!
Be careful not to damage the cylinder head.
CAUTION!
Risk of eye injury. Eye protection required.
4
Clean the seat bed carefully and check the cylin-
der head for cracks.
5
Measure the diameter of the valve seat bed in the
cylinder head. Determine whether a standard or
oversize dimension valve seat must be used.
Carry out any necessary machining to the valve
seat bed; refer to
Technical Data page 27
.
6
Cool the seat in carbon dioxide snow between –
60 °C (–76 °F) and –70 °C (–94 °F) and heat the
cylinder head by flushing with hot water, or by
some other method.
Install the new valve seat using a drift.
NOTICE!
Align the seat with the seat angle facing
the tool. Check sealing against the valve.
P0007003
P0007004
21-4 Valve Mechanism
7748841 06-2010
199
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