Compression Pressure
Inspection |
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. |
Disconnect the injector connectors (A) and
ignition coil connectors (B).

|
3. |
Remove ignition coils (A).

|
4. |
Remove spark plugs.
Using a 16mm plug wrench, remove the 4 spark
plugs. |
5. |
Check cylinder compression
pressure.
A. |
Insert a compression gauge into the
spark plug hole.

|
B. |
Fully open the
throttle. |
C. |
While cranking the engine, measure the
compression pressure.
Always use a fully charged battery
to obtain engine speed of 200 rpm or
more. | |
D. |
Repeat steps (a) through (c) for each
cylinder.
This measurement must be done in
as short a time as
possible. |
Compression pressure :
1,283kPa (13.0kgf/cm²,
185psi)
Minimum
pressure :
1,135kPa (11.5kgf/cm²,
164psi)
Difference between each cylinder
:
100kPa (1.0kgf/cm², 15psi) or
less
| |
E. |
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 (a)
through (c) for cylinders with low
compression. |
•
|
If adding oil helps the
compression, it is likely that the piston rings and/or
cylinder bore are worn or
damaged. |
•
|
If pressure stays low, a valve may
be sticking or seating is improper, or there may be
leakage past the
gasket. | | |
6. |
Reinstall spark
plugs. |
7. |
Install ignition
coils. |
8. |
Connect the injector connectors and ignition
coil connectors. |
Valve Clearance Inspection And
Adjustment
Inspect and adjust the valve clearance when
the engine is cold (Engine coolant temperature : 20°C (68°F)) and
cylinder head is installed on the cylinder
block. |
1. |
Remove the cylinder head cover. (Refer to
Timing system in this group) |
2. |
Set No.1 cylinder to
TDC/compression.
A. |
Turn the crankshaft pulley and align its
groove with the timing mark "T" of the lower timing chain
cover.

|
B. |
Check that the mark(A) of the CVVT
sprockets are in straight line on the cylinder head surface as
shown in the illustration.
If not, turn the crankshaft one
revolution (360°)

| |
3. |
Inspect the valve clearance.
A. |
Check only the valve indicated as shown.
[No. 1 cylinder : TDC/Compression] measure the valve
clearance.

·Using a thickness gauge, measure the
clearance between the tappet and the base circle of
camshaft.
·Record the out-of-specification valve
clearance measurements. They will be used later to determine
the required replacement adjusting tappet.
Valve
clearance
Specification
Engine coolant temperature : 20°C
[68°F]
Limit
Intake : 0.10 ~ 0.30mm (0.0039 ~
0.0118in.)
Exhaust : 0.20 ~ 0.40mm (0.0079 ~
0.0157in.)
| |
B. |
Turn the crankshaft pulley one
revolution (360°) and align the groove with timing mark "T" of
the lower timing chain cover. |
C. |
Check only valves indicated as shown.
[NO. 4 cylinder : TDC/compression]. Measure the valve
clearance.

| |
4. |
Adjust the intake and exhaust valve
clearance.
A. |
Set the No.1 cylinder to the
TDC/compression. |
B. |
Marks on the timing chain and camshaft
timing sprockets. |
C. |
Remove the service hole bolt(A) of the
timing chain cover.

The bolt must not be reused once
it has been
assembled. | |
D. |
Insert the SST(A) (09240-2G000) in the
service hole of the timing chain cover and release the
ratchet.

|
E. |
Remove the front camshaft bearing
cap(A).

|
F. |
Remove the exhaust camshaft bearing cap
and exhaust camshaft. |
G. |
Remove the intake camshaft bearing cap
and intake camshaft.
When disconnecting the timing
chain from the camshaft timing sprocket, tie or hold the
timing chain so it does not fall into the timing
cover. | |
H. |
Tie down timing chain so that it dosen't
move.
Be careful not to drop anything
inside timing chain
cover. | |
I. |
Measure the thickness of the removed
tappet using a micrometer.

|
J. |
Calculate the thickness of a new tappet
so that the valve clearance comes within the specified
value.
Valve clearance (Engine coolant
temperature : 20°C [68°F])
T : Thickness of removed
tappet
A : Measured valve
clearance
N : Thickness of new
tappet
Intake : N = T + [A -
0.20mm(0.0079in.)]
Exhaust : N = T + [A-0.30mm
(0.0118in.)]
| |
K. |
Select a new tappet with a thickness as
close as possible to the calculated value.
Shims are available in 47size
increments of 0.015mm (0.0006in.) from 3.00mm (0.118in.)
to 3.690mm
(0.1452in.) | |
L. |
Place a new tappet on the cylinder
head. |
M. |
Hold the timing chain, and install the
intake camshaft and CVVT
assembly. |
N. |
Align the matchmarks on the timing chain
and CVVT sprocket. |
O. |
Install the exhaust camshaft and CVVT
assembly. |
P. |
Install the front bearing
cap.
Tightening torque :
14.7N.m (1.5kgf.m, 10.8lb-ft) +
27.4 ~ 31.4N.m (2.8 ~ 3.2kgf.m, 20.3 ~
23.1lb-ft)
| |
Q. |
Install the sevice hole
bolt.
Tightening torque :
11.8 ~ 14.7N.m (1.2 ~ 1.5kgf.m,
8.7 ~ 10.8lb-ft)
| |
R. |
Turn the crankshaft two turns in the
operating direction(clockwise) and realign crankshaft sprocket
and CVVT sprocket timing marks (A).

|
S. |
Recheck the valve
clearance.
Valve clearance (Engine coolant
temperature : 20°C [68°F])
[Specification]
Intake : 0.17 ~ 0.23mm (0.0067 ~
0.0090in.)
Exhaust : 0.27 ~ 0.33mm (0.0106 ~
0.0129in.)
| | |