MAINTENANCE MANUAL OF ENGINE
34
Installing the valve spring
Replacement of valve spring
Special tools:
Valve spring compression tool
Screw stud attachment
Alignment screw attachment
Attention: The following description is for the re-
placement of valve springs of a single cylinder.
Warning: Wear protective goggles when replacing
valve springs.
1. Dismantle the valve mechanism (see Section 3 of
this Chapter).
2. Rotate the crankshaft counter-clockwise until the
piston where the valve springs are to be replaced
moves to top dead center (at the moment, the intake
valve is about to open and the exhaust valve is not
yet fully closed).
3. Remove the rocker arm assembly (see Section
4.7 of this Chapter).
4. Install the compression tool and the correspond-
ing attachment.
5. Compress the valve spring and remove the valve
split cone. Be sure to compress the spring vertically.
Failure to do so could cause damage to the valve
stem.
Attention: Do not rotate the crankshaft while re-
moving the valve spring.
6. Release the valve spring compression tool. Re-
move the valve spring cap and the valve spring.
7. Install the new inner and outer valve springs.
8. Install the valve spring cap.
Attention: Be sure to compress the spring vertically.
Failure to do so could cause damage to the valve
stem.
9. Compress the valve spring to install the valve
split cone. Remove the compression tool.
Remark: If valve springs of more than one cylinder
have to be replaced, the valve springs of two cylin-
ders can be replaced at the same time. Take the
4-cylinder engine as an example, the valve springs
of cylinders 1 and 4, or of cylinders 2 and 3 can be
replaced at the same time.
To Next Page
Loading...
Need help?
General
