How to Check the Compression — Opel Astra G (1998-2009)

How to Check the Compression Opel Astra G

1. Open bonnet
2. Remove air cleaner housing (5) and air intake manifold (3) • 1 mass air flow meter wiring harness plug (4) • Unclip tank ventilation hose (1) • 1 fastening bolt (2) • 1 clip

3. Remove air intake manifold
4. Remove DIS-ignition module • Remove cover of DIS-ignition module in the direction of the arrow • 2 bolts • remove from spark plugs using KM-6009 (1)

Note. Note arrow on cover

5. Remove throttle body coolant hoses (1) and (2) • Collect coolant – Place collecting basin underneath. • from throttle body – 2 clips
6. Remove throttle body wiring harness plug • 1 wiring harness plug (4)
7. Remove throttle body from intake manifold • 4 bolts (3)

8. Remove spark plugs • using spark plug key KM-194-E
9. Remove relay holder cover
10. Remove fuel pump relay • Pull out of socket
11. Compression, Check • 4 cylinder • Start engine (approx. 4 seconds) • Compare compression values – Maximum pressure differential 100 kPa (1 bar)

Note. 2 people

Note. Engine revs at least 300/min

12. Install fuel pump relay • Place into socket – Ensure plug contacts are sound
13. Install relay carrier cover
14. Install spark plugs • using spark plug key KM-194-E • Tightening torque 25 Nm
15. Replace throttle body using new seal on intake manifold • Clean sealing surface • 4 bolts – Tightening torque 8 Nm
16. Install throttle body wiring harness plug • 1 wiring harness plug – Lock wiring harness plug
17. Install throttle body coolant hoses • on throttle body – 2 clips
18. Install DIS-ignition module (1) • Replace seals (2) • 2 bolts • Tightening torque 8 Nm – Place cover on DIS-ignition module

19. Install air cleaner housing and air intake manifold • Place 1 mass air flow meter wiring harness plug • Clip in tank ventilation hose • 1 fastening bolt • 1 clip – Tightening torque 3.5Nm
20. Check coolant level and correct if necessary.
21. Programme transient memory
22. Close bonnet

How to Check the Compression Opel Astra G