Compression Check: Testing and Inspection

Special Tools
- Compression Tester No. 999 9689, or equivalent
- Ignition Switch No. 115 8263, or equivalent
- Extension L155 No. 115 8540, or equivalent

NOTE: For additional information on special tools and equipment used in this procedure, refer to Service and Repair. Tools For Engine Service and Repair





Distributor Ignition System (DI System)

WARNING:
- The DI system operates at high power and dangerous voltages in both low and high tension circuits.
- Dangerous voltages occur throughout the DI system, even in connectors etc.

NOTE: Measure compression with the engine hot and at wide open throttle

- Normal value B5254: 1.3-1.5 MPa (185-213 psi)
- Maximum deviation between cylinders: 0.2 MPa (28.4 psi)

NOTE: This applies when the engine is warm and the throttle fully open and the engine being turned by the starter motor at 4.2-5.0 rps (250-300 rpm).





1. Remove:
- timing pick-up connector
- HT lead cover
Lock throttle open:
- Remove spark plugs and connect starter switch tool No. 115 8263, or equivalent.
Connect connector between alternator (+) and service output on control module.





2. Measure compression:
- Use compression tester tool No. 999 9689 with extension sleeve tool No. 115 8540, or equivalent.
- Measure compression in all cylinders.
- Reinstall spark plugs, screw in plugs until seal is in contact with cylinder head.
Tighten to: 25 Nm (18 ft lb).
- Reinstall components.