Engine Compression Test. Chevrolet Joy 2008

For 1990-2009 cars

#### Tools Required

09915-64510 Compression Pressure Gage, or equivalent

Check the compression pressure in the following procedures:

1. Warm up the engine to the normal operating temperature.

Specification
The cooling temperature is 80-90°C (176-194°F).

2. Stop the engine and then remove the high tension cable and the spark plug.
3. Disconnect the distributor optical sensor connector.
4. Install the 09915-64510 (1) in the hole of spark plug.
5. Disengage the clutch in neutral to lighten starting load on engine upon cranking, and depress the accelerator all the way 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.

• | Upon inspection, make the connection perfectly airtight between the hole of the spark plug and the compression pressure gage.

Specification

• | The compression pressure Standard is 1,225.75 kPa (177.73 psi).

• | The compression pressure limit is 1,176.72-1,274.78 kPa (170.62-184.84 psi).

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