Valve Guide - APRILIA RSV mille 956X Service And Repair Manual

ENGINE

3.6.28 VALVE GUIDE

Carefully read 0.2.1 (PRECAUTIONS AND GENERAL
INFORMATIONS).
Use a dial gauge to measure the wear of the valve
guide (1).
Wear limit (2): max. Ø 6.05 mm.
NOTE
If the valve guide is worn, it can be replaced.
ASSEMBLY AND DISASSEMBLY
Slip off the valve stem seal (3) and remove the valve
spring shim (4).
NOTE
Replace the valve stem seal (3).
To eliminate the valve guide with a reamer (5) as far as
the start of the notch (6).
NOTE
The sharp edge of the valve guide must be elim-
inated as, otherwise, the head slot is in danger of being to
slide when the valve guide is removed.
Have the appropriate special tool
0277510 valve guide disassembly pad).
NOTE
Do not heat the head.
Use the pad (7) to remove the rest of the guide valve in
the direction of the exhaust manifold.
Check the valve guide slot for tailings.
NOTE
Should any signs of picking-up be encountered,
the head must be replaced.
3 - 72
&
(7) to hand (cod.
RSV mille