TOHATSU BFT75A Service Manual page 395

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CYLINDER HEAD
• Use the special tool under the following conditions:
– At cylinder head assembly
– If the engine power drops at high speed but the
cause cannot be determined.
Install the cylinder head cover (page 14-16).
Start the engine and let it warm up five minutes.
Remove the cylinder head cover (page 14-15).
Remove the No.5 rocker shaft bolt, and install the air
stopper (special tool) as shown.
Remove the No.3 rocker shaft bolt, and install the
special tool as shown.
TOOLS:
Air pressure regulator [1]
VTEC air adapter [2]
VTEC air stopper [3]
• Check that the following conditions are met before
using the air supply (special tool). The following
conditions are essential for use of the air supply, as
the specified air pressure of 340 kPa (3.5 kgf/cm
psi) must be maintained at the gauge of the tool.
Stop using the air tool if the specified pressure
cannot be maintained.
– Check whether the air compressor tank is under
the specified air pressure and the tank gauge
shows the value of the set pressure.
– Connect the air supply to the air intake port
located close to the compressor.
– Check as quickly as possible (within 6 seconds),
or the air pressure may drop, making it hard to
switch the valve timing to the high lift side.
• Check on each cylinder with the piston at top dead
center of its compression stroke.
• Oil can spurt out when air pressure is applied. Adjust
the air pressure with the regulator valve (special
tool) and increase the air pressure gradually.
Apply the specified air pressure to the special tool.
Air pressure: 340 kPa (3.5 kgf/cm
Check
interconnected when applying the specified amount of
air pressure. Move the secondary rocker arm [1] up and
down with finger, and check that the primary rocker arm
[2] moves up and down to.
If there is an abnormality in the rocker arm movement,
disassemble and check the rocker arms. Replace the
rocker arms as an assembly.
Remove the special tools, and tighten the rocker shaft
bolts to the specified torque.
TORQUE:
After set the cylinder head cover, check that the MIL
does not come on.
14-36
07AAJ-PNAA101
07AAK-RMEA100
07AAK-RMEA200
2 , 50 psi)
that the two intake rocker
29 N·m (3.0 kgf·m, 21 lbf·ft)
2
,50
[1]
arms are
[2]
[1]
[2]
[3]