ENG:9pcs Petrol engine compression tester set

ENG:9pcs  Petrol engine compression tester set

 OPERATION 
1: Test Procedure
 WARNING! Always release the pressure via the Release Valve before disconnecting the tester.
 Press the release valve slowly to release the pressure gradually. Refer to Fig.1.

 NOTE! A variation in compression readings between cylinders is often better indication of engine problems than the absolute values of compression.

2:Run the engine until it reaches the normal operating temperature

3: Stop the engine and disconnect all spark plug wires, numbering them according to the cylinder to

4: which they were connectec Loosen all spark plugs by about half a tumn, but do not remove them.

5: Using an air hose or wire brush, remove all the dirt and debris from the spark plug wells

6: Remove the spark plugs and place them on a clean, flat surface in the cylinder order in which they  were removed

7:Remove the air filter and set the throttle plates to the wide open position, taking care not to damage

 the linkage or throttle components.

 IMPORTANT: After test, failure to return the throttle plates to the closed position before starting the engine can cause serious damage to the engine.

8: Disconnect the ignition system, following the manufacturer's recommendations in the vehicle servicing manual.

9: Select the spark plug adaptor required for the vehicle. Screw the adaptor to the hose. Screw the spark plug adaptor and hose assembly into a spark plug well. Hand tighten only. DO NOT use a wrench. Refer to Fig.2

 10: Connect the coupling on the gauge to the hose. Ensure the coupling is fully engaged.

11: Crank the engine for at least five compression strokes, or until the pressure reading on the gauge

 stops rising

12: Record the compression reading, then push the side release valve to relieve the pressure.

13: Repeat the test and record the reading Relieve the pressure and remove the hose and adaptor from

 the spark plug well.

14: Repeat for the remainder of the cylinders

15: You may also connect one of the Push On Connectors straight to the gauge coupling to aid quick

 installation. Select either the straight or angled stem for easlest access.