Disassembly and assembly

d. Continue to rotate the crankshaft and gradually
release the pressure on Tooling (B) until the
piston is at the top center position. The valve is
now held in a position that allows the valve
spring to be safely removed.
NOTICE
Do not turn the crankshaft while the valve springs are
removed.
Note: Valve springs must be replaced in pairs for the
inlet valve or the exhaust valve of each cylinder. If all
valve springs require replacement, the procedure can
be carried out on two cylinders at the same time. The
procedure can be carried out on the following pairs of
cylinders, 1 with 4 and 2 with 3. Ensure that all of the
valve springs are installed before changing from one
pair of cylinders to another pair of cylinders.
Illustration 140 g03001601
Typical example
2. Apply sufficient pressure to Tooling (B) in order to
allow removal of valve keepers (1). Remove valve
keepers (1).
Note: Do not compress the spring so that valve
spring retainer (2) touches the valve stem seal.
3. Slowly release the pressure on Tooling (B).
4. Remove valve spring retainer (2) and remove
valve spring (3).
5. If necessary, remove the valve stem seal in order
to remove valve spring seat (4).
6. Repeat Steps 2 through 5 in order to remove the
remaining valve spring from the appropriate
cylinder.
7. Remove Tooling (B).
Installation Procedure
Table 21
Required Tools
Tool Part Number
Part Description Qty
A
(1)
T400156
Housing
1
T400157
Engine Turning Tool
1
B
T400158
Valve Spring Compressor
1
-
Stud M6 by 25mm
1
C
T400154
Valve Stem Seal Installer 1
(1)
This Tool is used in the aperture for the electric starting motor.
Note: Either Tooling (A) can be used. Use the Tooling
that is most suitable.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
NOTICE
Do not turn the crankshaft while the valve springs are
removed.
1. Inspect the valve springs for the correct length.
Refer to Specifications, “Cylinder Head Valves ”
for more information.
82 UENR0624-03
Disassembly and Assembly Section
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