Engine Compression Test. Chevrolet Joy 2008

For 1990-2009 cars

#### Tools Required

09915-64510 Compression Pressure Gage or equivalent

1. Warm up the engine to the normal operating temperature (cooling temperature: 80-90°C (176-194°F).
2. Stop the engine; then remove the high tension cable and the spark plug.
3. Disconnect the distributor optical sensor connector.
4. Install 09915-64510 (1) in the hole of the spark plug.
5. Disengage the clutch in Neutral, to lighten starting load engine upon cranking, and press the accelerator all the way down to make the throttle fully open.
6. Crank the engine with the starting motor and read the highest pressure on the compression pressure gage.

• | The difference of measured value between cylinders is 98.06 kPa (14.22 psi) and less.

• | On checking, make the connection perfectly air tight between the hole of the spark plug and the compression pressure gage.

Specification

• | Compression pressure-400 RPM: the standard is 1,274.87 kPa (184.9 psi).

• | Compression pressure-400 RPM: the limit is 177.8 kPa (192.1 psi).

7. After checking, remove the gage and install the removed parts.