Porsche 928 Workshop Manual page 220

928 Engine/Cylinder Head, Valves
15
NOTE ON ASSEMBLY (32-VALVE ENGINES)
REMOVING AND INSTALLING VALVE
SPRINGS WITH SPECIAL TOOL MADE BY
SAUER
l.Improvise a set of 4 bases from
wood or hard rubber for the
valves. Length 90 mm, width
40 mm, thickness 6 mm.
2.Position assembly bridge on
cylinder head. Use a clamp to
secure cylinder head to bench and
prevent it tilting.
3.Attach magnetic disassembly head
to lever. Compress valve spring
in cylinder head and use a small
screwdriver to pry taper valve
keepers from valve stem.
4.Use the magnetic disassembly head
to withdraw all the valve spring
parts.
5.Attach assembly head to lever.
Press clamping arms together and
insert taper valve keepers in
assembly head.
6.Place washer, valve spring
stop, valve spring and valve
spring plate in cylinder head and
compress with assembly head.
Engage taper valve keepers by
moving lever up and down
slightly. This action
automatically positions the taper
valve keepers correctly.
7.When the taper valve keepers are
engaged, the clamping arms of
the assembly head point out.
Printed in
Germany-XIX,1987
Tools - Cylinder Head
15 - 112 a
Removing and Installing
Valve Springs