Technical information

ENGINE – CAMSHAFT, VALVE STEM SEAL
11-9
Removal guidelines

A

Detaching the radiator upper hose
Align the indicator marks on the radiator upper hose and the hose
clamp, and then detach the radiator upper hose.

B

Removing the camshaft sprockets
Grip the hexagonal part of the camshaft with a wrench, loosen the
mounting bolt, and remove the camshaft sprocket.

C

Removing the valve spring retainer lock
Compress the valve spring using the special tool for compressing
valve springs (MD998772), and remove the valve spring retainer
lock.
Caution
When removing the valve spring retainer lock, each cylinder
piston should be in the top dead centre position. If pistons are
not in the top dead centre position, valves could fall into the
cylinders.
Fitting guidelines

A

Fitting the exhaust valve stem seals and the inlet valve
stem seals
1. Inlet valve stem seals and exhaust valve stem seals can be
distinguished by checking the colour of the rubber parts.
2. Apply a small quantity of engine oil to the valve stem seals.
3. Place the valve stem component into the guides, and then insert
a new valve stem seal into the valve stem guide by using the
special tool for installing valve stem seals.
Caution
(1) Valve stem seals cannot be re-used.
(2) Please use the special tool for installing valve stem seals
(MD998737) because oil could leak if the valve stem seals
are not fitted correctly.
Indicator marks
Colour of main
body: grey
Colour of main
body: grey/green
Inlet side Exhaust side
Valve
Valve guide
Valve stem
seal