Section 01 V-810
ENGINE
Subsection
05
(CYLINDER AND HEAD)
VALVE ADJUSTMENT
Remove valve covers. Refer to procedure else
where in this section.
Turn crankshaft to ignition TDC. see
CRANK
SHAFT LOCKING PROCEDURE
and
CAMSHAFT
TIMING PROCEDURE
below.
Hold adjustment screw and loosen locking nut.
Using feeler gauge, check the valve clearance.
7
Adjustment screw
2 Locking nut
3.
Feeler gauge
1
VALVE CLEARANCE
Exhaust
0.11 to 0.19
mm
(.0043 to .0075
in)
Intake
0.06
to
0
.
14
mm
(.0024 to .0055
in)
NOTE:
Use mean value of exhaust/intake to en
sure a proper valve adjustment.
Hold the adjustment screw at the proper position
and torque the locking nut.
Repeat the procedure for each valve.
Before installing valve covers, recheck all valve ad
justments.
VALVE COVER
Removal
Remove:
- distance screws of valve cover
32
1.
Distance screws
2 Valve cover
-
valve cover and profile gasket
no.
1.
1.
Valve cover
2. Profile gasket
1
Repeat the procedure for the other valve cover if
required.
Inspection
Check the profile gasket on the valve cover if it is
brittle, cracked or hard. If so, replace the profile
gasket.
Installation
For installation. reverse the removal procedure.
Torque the valve cover distance screws in a criss
cross sequence.
vmr2006-043
CHAIN TENSIONER
Removal
&
WARNING
Chain tensioner is spring loaded. Never per
form this operation immediately after the en
gine has been run because the exhaust sys
tem can be very hot. Wait until exhaust sys
tem is warm or cold.
Remove:
- chain tensioner plug
- 0-ring no.
20
- spring
- chain tensioner plunger
7.
Chain tensioner plug
2. 0-ring
3.
Spring
4.
Chain tensioner plunger
- screws retaining chain tensioner housing
- chain tensioner housing with 0-ring no.
21.
vmr100&-043
Section 01 V-810
ENGINE
Subsection
05
(CYLINDER AND HEAD)
7.
Chain tensioner
screws
2. Cham
tensioner housing
3.
0-nng
Inspection
Check the housing for cracks or other damages.
Replace if necessary.
Check chain tensioner plunger for free movement
and/or scoring.
Check if 0-ring no.
20
and no.
21
are brittle,
cracked or hard. Replace if necessary.
Check spring condition. Replace if broken or
worn.
Installation
For installation, reverse the removal procedure.
However. pay attention to the following.
NOTE:
Slightly screw the plunger until it touches
the chain tensioner guide. Use only two fingers
to hold the screwdriver, in order to recognize the
gentle contact with the chain tension guide.
CAUTION:
Improper adjustment of the chain
tension will lead to severe engine damage.
Install a spring end in plunger groove and the other
in the plug groove. Screw plug.
NOTE: Do not forget to place the 0-ring no.
20
on chain tensioner plug.
CAMSHAFT TIMING GEAR
Removal
Remove:
- valve cover
Turn crankshaft to ignition TDC, see
CRANK
SHAFT LOCKING PROCEDURE
and
CAMSHAFT
TIMING PROCEDURE
below.
- chain tensioner
33
