Volkswagen Golf 1999 Service Manual page 173

Valve gear, servicing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...
Valve seats, reworking
Special tools and equipment
Depth gauge
Valve seat refacing tool
Work sequence
Note:
When repairing engines with leaking valves, it is
not sufficient to rework or replace valve seats
and valves. It is also necessary to check the
valve guides for wear. This is particularly
important on high mileage engines
91 .
The valve seats should only be reworked just
enough to produce a perfect seating pattern.
The maximum permissible reworking dimension
must be calculated before reworking
commences. If the reworking dimension is
exceeded, the function of the hydraulic lifters
can no longer be guaranteed and the cylinder
head should be replaced.
- Remove camshafts
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