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

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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.

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OM 662LA Engine : 1-2-4-5-3

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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.