Compression Check: Testing and Inspection

COMPRESSION INSPECTION [KL]
1. Verify that the battery is fully charged.
- Recharge it if necessary.
2. Warm up the engine to the normal operating temperature.
3. Stop the engine and allow it to cool for about 10 minutes.
4. Perform "Fuel Line Safety Procedures". Leave the fuel pump relay removed. Refer to Powertrain Management; Fuel Delivery and Air Induction.
5. Remove the spark plugs.





6. Disconnect the distributor connector.





7. Install the SSTs into the No.1 spark plug hole.
8. Fully depress the accelerator pedal and crank the engine.
9. Record the maximum gauge reading.
10. Inspect each cylinder as above.
- If the compression in one or more cylinders is low pour a small amount of clean engine oil into the cylinder and recheck the compression.
- If the compression increases, the piston, piston rings, or cylinder wall may be worn.
- If the compression stays low, a valve may be stuck or improperly seated.
- If the compression in adjacent cylinders stays low, the cylinder head gasket may be damaged or the cylinder head distorted.





Compression

11. Remove the SSTs.
12. Connect the distributor connector.
13. Install the fuel pump relay.
14. Install the spark plugs.
Tightening torque: 15 - 22 Nm (11.5 - 2.3 kgf-m, 11 - 16 ft. lbs.)