COMPRESSION PRESSURE
If the there is lack of power, excessive oil
consumption or poor fuel economy, measure the compression
pressure. |
1. |
Warm up and stop engine.
Allow the engine to warm up to normal
operating temperature. |
2. |
Remove ignition coils. (Refer to Ignition
system in EE Group) |
3. |
Remove spark plugs.
Using a 16mm plug wrench, remove the 4 spark
plugs. |
4. |
Check cylinder compression
pressure.
(1) |
Insert a compression gauge into the
spark plug hole.

|
(2) |
Fully open the
throttle. |
(3) |
While cranking the engine, measure the
compression pressure.
Always use a fully charged battery
to obtain engine speed of 250 rpm or
more. | |
(4) |
Repeat steps (1) through (3) for each
cylinder.
This measurement must be done in
as short a time as
possible. |
Compression pressure :
1,420kPa (14.5kgf/cm²,
206psi)
Minimum pressure :
1,270kPa (13kgf/cm²,
184psi)
Difference between each cylinder
:
100kPa (1.0kgf/cm², 15psi) or
less
| |
(5) |
If the cylinder compression in 1 or more
cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat steps (1)
through (3) for cylinders with low compression.
A. |
If adding oil helps the
compression, it is likely that the piston rings and/or
cylinder bore are worn or
damaged. |
B. |
If pressure stays low, a valve may
be sticking or seating is improper, or there may be
leakage past the
gasket. | | |
5. |
Reinstall spark
plugs. |
6. |
Install ignition coils. (Refer to Ignition
system in EE Group) |
Timing belt tension adjustment
1. |
Remove the engine cover(A).

|
2. |
Remove RH front
wheel. |
3. |
Remove the 4bolts(B) and timing belt upper
cover(A).

|
4. |
Slacken the tensioner bolt.
When check the timing belt tension or
install the timing belt tensioner, must it the engine oil
temperature is between 15°C(59°F) and
25°C(77°F). | |
5. |
Using a hex wrench, turn the adjuster
counterclockwise to make the indicator of the arm (A) located at the
center of the base notch.

Do not rotate the adjuster
clockwise.
It will result in auto tensioner's
functional
problem. | |
6. |
Tightening tensioner bolt with fixing the
indicator not to move.
Tightening
torque
Tensioner bolt :
22.6 ~ 28.4Nm (2.3 ~ 2.9kgf.m, 16.6 ~
21.0lb-ft)
| |
7. |
Turn the crankshaft two revolutions in the
operating direction (clockwise) and check that the indicator is in
the center of base. |
8. |
If the indicator is not located at the center
of base, slacken the bolt and repeat the above
procedure. |
9. |
Install the timing belt upper cover (A) with
the four bolts (B).
Tightening
torque :
7.8 ~ 9.8Nm (0.8 ~ 1.0kgf.m, 5.8 ~
7.2lb-ft)
|

|
10. |
Install RH front
wheel. |
11. |
Install engine cover(A).

|
VALVE CLEARANCE INSPECTION AND
ADJUSTMENT
MLA (MECHANICAL LASH
ADJUSTER)
Inspect and adjust the valve clearance when
the engine is cold (Engine coolant temperature : 20°C) and cylinder
head is installed on the cylinder
block. |
1. |
Remove the engine
cover. |
2. |
Remove the upper timing belt
cover.
(1) |
Loosen the upper timing cover bolts and
then remove the
cover. | |
3. |
Remove the cylinder head cover.
(1) |
Disconnect the spark plug cables and do
not pull on the spark plug by force.
Pulling on or bending the cables
may damage the connductor
inside. | |
(2) |
Disconnect the P.C.V hose(A) and the
breather hose(B) from the cylinder head cover.

|
(3) |
Disconnect the accelerater cable(A) from
the cylinder head cover.

|
(4) |
Loosen the cylinder head cover bolts(B)
and then remove the cover(A) and gasket.

| |
4. |
Set No.1 cylinder to
TDC/compression.
(1) |
Turn the crankshaft pulley and align its
groove with the timing mark "T" of the lower timing belt
cover.

|
(2) |
Check that the hole of the camshaft
timing pulley(A) is aligned with the timing mark of the
bearing cap.
If not, turn the crankshaft one
revolution (360°)

| |
5. |
Inspect the valve clearance.
(1) |
Check only the valve indicated as shown.
[No. 1 cylinder : TDC/Compression] measure the valve
clearance.

A. |
Using a thickness gauge, measure
the clearance between the tappet shim and the base
circle of camshaft. |
B. |
Record the out-of-specification
valve clearance measurements. They will be used later to
determine the required replaement adjusing
shim.
Valve clearance
SpecificationEngine coolant
temperature : 20°C [68°F]Intake : 0.20mm
(0.0079in.)Exhaust : 0.28mm
(0.0110in.)
LimitIntake : 0.12 ~ 0.28mm
(0.0047 ~ 0.0110in.)Exhaust : 0.20 ~ 0.38mm
(0.0079 ~ 0.0150in.)
| | |
(2) |
Turn the crankshaft pulley one
revolution (360°) and align the groove with timing mark "T" of
the lower timing belt cover. |
(3) |
Check only valves indicated as shown.
[NO. 4 cylinder : TDC/compression]. Measure the valve
clearance.

| |
6. |
Adjust the intake and exhaust valve
clearance.
(1) |
Turn the crankshaft so that the cam lobe
of the camshaft on the adjusting valve is
upward. |
(2) |
Using the SST(09220-2D000), press down
the valve lifter and place the stopper between the camshaft
and valve lifter and remove the special tool.

|
(3) |
Remove the adjusting shim with a small
screw driver(A) and magnet(B).

|
(4) |
Measure the thickness of the removed
shim using a micrometer.

|
(5) |
Calculate the thickness of a new shim so
that the valve clearance comes within the specificified
value.
Valve
clearance (Engine coolant temperature :
20°C)
T : Thickness of removed
shim
A : Measured valve
clearance
N : Thickness of new
shim
Intake : N = T + [A -
0.20mm(0.0079in.)]
Exhaust : N = T + [A-0.28mm
(0.0110in.)]
| |
(6) |
Select a new shim with a thickness as
close as possible to the caculated value. [Refer to the
Adjusting shim selection chart]
Shims are available in 20size
increments of 0.04mm (0.0016in.) from 2.00mm (0.079in.)
to 2.76mm
(0.1087in.) | |
(7) |
Place a new adjusting shim on the valve
lifter. |
(8) |
Using the SST(09220-2D000), press down
the valve lifter and remove the
stopper. |
(9) |
Recheck the valve
clearance.
Valve
clearance (Engine coolant temperature :
20°C)
[Specification]
Intake : 0.20mm
(0.0079in.)
Exhaust : 0.28mm
(0.0110in.)
[Limit] (After adjusting valve
clearance)
Intake : 0.17 ~ 0.23mm (0.0067 ~
0.0091in.)
Exhaust : 0.25 ~ 0.31mm (0.0098 ~
0.0122in.)
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