Disassembly and assembly

20 KENR6226-01
Disassembly and Assembly Section
NOTICE
Install suitable plugs to the inlet ports of the cylinder
head in order to
prevent the entry of loose parts into
the engine.
NOTICE
Plug the apertures for the push rods in the cylinder
head in order to prevent the entry of loose parts into
the engine.
Note: The removal procedure is similar for the two
cylinder, the three cylinder and the four cylinder
engines. The following procedure should be adopted
in order to remove the valve springs when the
cylinder head is installed to the engine. Refer to
Disassembly and Assembly, “Inlet and Exhaust
Valves - Remove and Install” for the procedure to
remove the valve springs from a cylinder head that
has been removed from the engine.
Note: Ensure that the appropriate piston is at the top
center position before the valve spring is removed.
Failure to ensure that the piston is at the top center
position may allow the valve to drop into the cylinder
bore.
g0130458
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Illustration 27
Typical example
1. Follow Ste
ps 1.a through 1.d in order to position
the appropriate piston at top center.
a. Install To
oling (A) and (B) in position on the
cylinder head in order to compress a valve
spring for the appropriate piston.
b. Use Tooling (A) in order to compress valve
spring (3) and open the valve slightly.
Note: Do not compress the spring so that the valve
spring retainer (2) touches the valve stem seal.
c. Carefully rotate the crankshaft until the piston
touches the valve.
Note: Do not use excessive force to tu rn the
crankshaft. Th
e use of force can result in bent valve
stems.
d. Continue to ro
tate the crankshaft and gradually
release the pressure on Tooling (A) 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
Ensure that th
e valve spring is compressed squarely
or damage to the valve stem may occur.
2. Use tool (A) i
n order to compress valve spring (3).
Remove valve keepers (1).
Note: For fou
r cylinder engines, if all valve springs
require replacement the procedure can be carried
out on two cylinders at the same time. The procedure
canbecarri
ed out on the following pairs of cylinders.
1with4and2with3.Ensurethatallofthevalve
springs are installed before changing from one pair
of cylinder
s to another pair of cylinders.
NOTICE
Do not turn the crankshaft while the valve springs are
removed.
3. Apply sufficient pressure to Tooling (A) in order to
allow removal of the valve keepers (1).
Note: Do not compress the spring so that the valve
spring retainer (2) touches the valve stem seal.
Remove valve keepers (1).
4. Slowly rel
easethepressureonTooling(A).
5. Remove valve spring retainer (2) and remove
valve spri
ng (3).
6. RemoveTooling(A)and(B).
This document has been printed from SPI². Not for Resale