Subsection 08 (TOP END)
1
R400m
o
tr85A
2
1. Thrust washer
2. Sealing lips of valve stem seal
To ease installation of cotters, apply oil or grease
on them so that they remain in place while relea-
sing the spring.
After spring is installed, ensure it is properly
locked by tapping on valve stem end with a soft
hammer so that valve opens and closes a few
times.
NOTICE
An improperly locked valve spring
will cause engine damage.
VALVE GUIDES
Inspecting the Valve Guide
Always replace valve stem seals whenever valve
guides are removed.
Measure valve guide in three places using a small
bore gauge.
NOTE:
Clean valve guide to remove carbon de-
posits before measuring.
Replace valve guide if it is out of specification or
has other damages such as wear or friction sur-
face.
VALVE GUIDE DIAMETER (INTAKE AND
EXHAUST VALVES)
NEW
4.998 mm to 5.018 mm
(.1968 in to .1976 in)
570
ENGINE
SERVICE
LIMIT
5.050 mm (.1988 in)
NEW
5.506 mm to 5.518 mm
(.2168 in to .2172 in)
850 AND
1000R
ENGINES
SERVICE
LIMIT
5.568 mm (.2192 in)
Removing the Valve Guide
1. Remove
cylinder
head
(see
CYLINDER
HEAD
in this subsection).
2. Remove valves (see
VALVES
in this subsec-
tion).
NOTE:
Clean valve guide area from contamination
before removal.
3. Drive valve guide out of cylinder head using
specified tool.
ENGINE
REQUIRED TOOL
570
engine
VALVE GUIDE
REMOVER 5 MM
(P/N 529 035 924)
850 and
1000R
engines
VALVE GUIDE
REMOVER (6 MM)
(P/N 529 036 074)
All
engines
Hammer
2
R400m
o
tr86A
1
1. Valve guide remover
2. Valve guide
Installing the Valve Guide
For installation, reverse the removal procedure.
Pay attention to the following details.
Clean the valve guide bore before reinstalling the
valve guide into cylinder head.
Install valve guide.
ENGINE
REQUIRED TOOL
570
engine
VALVE GUIDE
INSTALLER
(P/N 529 036 140)
850 and
1000R
engines
VALVE GUIDE
INSTALLER
(P/N 529 036 269)
850 and 1000R Engines
NOTICE
Valve guide installer is used for in-
take and exhaust valve guides. Choose proper
side for installation.
18
vmr2016-419