Daewoo Musso. Manual — part 15
GENERAL ENGINE INFORMATION 1A3-11
28bar
Approx.18bar
Max. 3bar
COMPRESSION PRESSURE TEST
1 Test Adapter
2 Flexible Connector
3 Compression Pressure Recorder
Tools Required
000 589 65 09 00 Socket
001 589 73 21 00 Hand Vacuum Pump
Service Data
Normal Compression Pressure
Minimum Compression Pressure
Permissible Pressure Difference Between Individual Cylinders
l
Engine at normal operating temperature of 80°C
1A3-12 GENERAL ENGINE INFORMATION
Compression Pressure Measurement
Notice
Ensure that no gear is engaged and that the vehicle is
protected from rolling.
1. Run the engine to be the coolant temperature 80°C.
2. Remove the fuel injection nozzle.
Socket Wrench Insert 001 589 65 09 00
3. Install the test adapter (1) and connect the flexible
connector (2) to the compression pressure recorder.
Compression Pressure Recorder 001 589 76 21 00
4. Disconnect the vacuum line from the stop unit and
connect the hand vacuum pump to the stop unit.
5. Pump the hand vacuum pump and make the fuel injection
pump in stop position.
Operating Pressure
Approx. 500bar
Hand Vacuum Pump 001 589 73 21 00
6. Using a starter motor, crank the engine 8 revolutions.
7. Measure the remaining cylinder compression pressure
in the same manner and compare it with service data.
Notice
If out of standard, do cylinder pressure leakage test.
8. Remove the compression pressure recorder.
9. Install the fuel injection nozzle.
GENERAL ENGINE INFORMATION 1A3-13
Cylinder Pressure Leakage tester
Connection Piece
CYLINDER PRESSURE LEAKAGE TEST
1 Connector
2 Connection Piece
3 Connection Hose
Permissible Pressure Leakage (Engine at Normal Operating Temperature of 80°C)
At Whole Engine
At Valve and Cylinder Head Gasket
At Piston and Piston Ring
Max. 25 %
Max. 10 %
Max. 20 %
Commercial Tools
BOSCH, EFAW 210 A or SUN CLT 228
BOSCH order no. 1 687 010 016
1A3-14 GENERAL ENGINE INFORMATION
Leakage Test
1. Run the engine to be the coolant temperature 80°C.
2. Remove the fuel injection nozzle.
3. Open the coolant subtank cap.
4. Check the coolant level and replenish if necessary.
5. Open the oil filler cap.
6. Remove the air cleaner cover and element.
7. Position the piston at TDC.
8. Install the connector (1) and connection piece (2).
9. Calibrate the tester and connect the connection hose
(3)
10. Pressurize with compressed air and compare the
pressure changes with permissible pressure leakage.
11. If permissible pressure leakage is out of standard, check
followings :
- Intake and exhaust lines.
- Sounds in oil filler area.
- Air bubbles in radiator coolant.
12. Do pressure leakage test for the remaining cylinders
according to the firing order.
l
OM 662LA Engine : 1-2-4-5-3
l
OM 661LA Engine : 1-3-4-2
13. Remove the tester.
14. Close the coolant pressure cap and oil filler cap.
15. Install the air cleaner element and cover.
16. Install the fuel injection nozzle.
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