Triumph TR6 PI Operation Manual page 79

6. The replacement of valve guides is best carried out
using special tool 60A with the appropriate adaptor,
to ensure the correct height of the guide above the
cylinder head - see Data. Assemble the new valve
guide in the tool with the chamfered end leading.
Position the tool on the combustion chamber face
and draw the new guide into position whilst
withdrawing the old one.
Valves
7. Examine the valves and discard any with worn or
bent stems and badly pitted or 'burnt heads. Valves
that have the head thickness reduced to 1/32 in (0·8
mm) dimension (A), should also be discarded. Valves
in an otherwise satisfactory condition may be
refaced.
Valve springs
8. Examine valve springs (inner and' outer - see Data)
for cracks and distortion.' Check the springs for free
and load length against the information in Data.
Discard any springs that do not meet the required
standard.
con tinucd
Triumph TR6 Manual. Part No. 545277 Issue 1
ENGINE
NT2181
12.29.18 Sheet 2