Engine Compression Test
Special Tools
• |
EN-46783
Thread Adapter |
• |
EN-46791
Adapter, Compression Tool |
For equivalent regional tools refer to
Special Tools .
Removal Procedure
3. |
Clean the injector sealing
surfaces in the cylinder head using EN-47632
cleaning tool (1) in following procedure: |
|
• |
first take the brush side to
loosen the dirt. |
|
• |
second take the sponge side to
remove the dirt. |
4. |
Remove the front compartment
fuse block cover (1). |
5. |
Remove the fuel pump
relay. |
Compression Test Cylinder 1
|
Note: EN-46791 adapter can only be installed in
pairs along with the fuel injector (cylinder 1 and 2 or cylinder 3
and 4).
|
1. |
Install EN-46791
adapter (1) with fuel injector (2) and fuel injector bracket
in cylinder 1 with a NEW fuel injector gasket. |
2. |
Install fuel injector
spherical washer |
3. |
Install fuel injector conical
washer |
4. |
Install fuel injector bracket
nut and tighten to 20 N·m (15 lb ft)
. |
5. |
Install EN-46783
thread adapter (3) to EN-46791 adapter
(1). |
|
Note: Use a
compression plotter with a measuring range of 10-40
bar (145- 580 PSI).
|
6. |
Install compression plotter to
EN-46783 thread adapter . |
8. |
Check the compression of
cylinder 1. |
|
Note: A second
technician is required.
|
|
Start engine for approximate 4 seconds. |
|
Note: Engine speed at
least 200 RPM.
|
9. |
Remove EN-46791
adapter (1) from cylinder 1. |
Compression Test Cylinder 2
|
Note: EN-46791 adapter can only be installed in
pairs along with the fuel injector (cylinder 1 and 2 or cylinder 3
and 4).
|
1. |
Install EN-46791
adapter (1) with fuel injector (2) and fuel injector bracket
in cylinder 2 with a NEW fuel injector gasket. |
2. |
Install fuel injector
spherical washer. |
3. |
Install fuel injector conical
washer. |
4. |
Install fuel injector bracket
nut and tighten to 20 N·m (15 lb ft)
. |
5. |
Install EN-46783
thread adapter (3) to EN-46791 adapter
(1). |
|
Note: Use a
compression plotter with a measuring range of 10-40
bar (145- 580 PSI).
|
6. |
Install compression plotter to
EN-46783 thread adapter . |
|
Note: A second
technician is required.
|
7. |
Check the compression of
cylinder 2. |
|
Note: Engine speed at
least 200 RPM.
|
8. |
Start engine for approximate 4
seconds. |
|
Note: A second
technician is required.
|
9. |
Check the compression of
cylinder 2 |
10. |
Remove EN-46791
adapter (1) from cylinder 2. |
Compression Test Cylinder 3
|
Note: EN-46791 adapter can only be installed in
pairs along with the fuel injector (cylinder 1 and 2 or cylinder 3
and 4).
|
1. |
Install EN-46791
adapter (1) with fuel injector (2) and fuel injector bracket
in cylinder 3 with a NEW fuel injector gasket. |
2. |
Install fuel injector
spherical washer. |
3. |
Install fuel injector conical
washer. |
4. |
Install fuel injector bracket
nut and tighten to 20 N·m (15 lb ft)
. |
5. |
Install EN-46783
thread adapter (3) to EN-46791 adapter
(1). |
|
Note: Use a
compression plotter with a measuring range of 10-40
bar (145- 580 PSI).
|
6. |
Install compression plotter to
EN-46783 thread adapter . |
7. |
Check the compression of
cylinder 3. |
|
Note: A second
technician is required.
|
|
Start engine for approximate 4 seconds. |
|
Note: Engine speed at
least 200 RPM.
|
8. |
Remove EN-46791
adapter (1) from cylinder 3. |
Compression Test Cylinder 4
|
Note: EN-46791 adapter can only be installed in
pairs along with the fuel injector (cylinder 1 and 2 or cylinder 3
and 4).
|
1. |
Install EN-46791
adapter (1) with fuel injector (2) and fuel injector bracket
in cylinder 4 with a NEW fuel injector gasket. |
2. |
Install fuel injector
spherical washer. |
3. |
Install fuel injector conical
washer. |
4. |
Install fuel injector bracket
nut and tighten to 20 N·m (15 lb ft)
. |
5. |
Install EN-46783
thread adapter (3) to EN-46791 adapter
(1). |
|
Note: Use a
compression plotter with a measuring range of 10-40
bar (145- 580 PSI).
|
6. |
Install compression plotter to
EN-46783 thread adapter . |
7. |
Check the compression of
cylinder 4 |
|
Note: A second
technician is required.
|
|
Start engine for approximate 4 seconds. |
|
Note: Engine speed at
least 200 RPM.
|
8. |
Remove EN-46791
adapter (1) from cylinder 4. |
|
Note: Maximum
pressure difference 1.5 bar (22 PSI).
|
9. |
Compare compression values
from cylinder 1-4 |
Installation Procedure
2. |
Install the fuel pump
relay. |
3. |
Install the front compartment
fuse block cover (1) |
|