- assistant;
- compression gauge.
Compression test sequence
1. Preparing the vehicle for work (see point 2a "Preparing a car for maintenance and repair").
2. Warm up the car engine to operating temperature and turn off the ignition.
3. Remove the fuse for the ECU and engine control system circuits (see "Engine Management System Relays and Fuses").
4. Unscrew the spark plugs (see "Spark plugs - replacement").
5. Install the compression gauge into the spark plug hole of one of the engine cylinders.
6. Open the throttle valve fully.
7. The assistant turns on the starter for 5-10 seconds.
We remember or write down the compression meter readings.
Similarly, we measure the compression in the three remaining cylinders. In a serviceable engine, the compression in the cylinders should be no less than 1.0 MPa (10 bar), and the difference in compression between the cylinders should be no more than 0.1 MPa (1.0 bar).