Actron KAL2504 User Manual

Instructions for

Compression Tester

Test Procedure

1. Start Engine and warm to normal

operating temperature.

2. Turn engine off

3. Remove and number spark plug wires

4. Loosen spark plugs one turn

5. Clean loose dirt and rust from and

around spark plug wells

6. Remove spark plugs and place on

clean flat surface in order removed

7. Remove air filter

8. Set carburetor throttle plate to wide

open using string.

CAUTION

Be careful not to damage linkage

or throttle body components.

CAUTION

Make sure to return

carburetor throttle plates to closed

position before starting engine.

9. Remove high tension lad from center

of distributor and connect to ground.

NOTE: To disable electronic ignition
systems, disconnect electronic ignition
module or remove primary battery
terminal from ignition coil.

NOTE: On GM HEI V-6 and V-8
disconnect primary lead from distrutor
cap.

Held Open Throttle
Plates

High Tension Lead

Ignition Disabling
Procedure

Primary Wire

GM HEI Ignition
Disabling Procedure

Carburetor

String

Jumper Wire

NOTE: Engines with 14 mm long reach
plugs, use long reach adapter.

CAUTION

Do not use long reach adapter

on short reach holes

10. Hand tighten spark plug adapter

hose into a spark plug well

CAUTION

Do not use a wrench to

attach spark plug adapter hose.

11. Connect spark plug adapter hose to

gauge

NOTE: Hose adapter is attached to
gauge by pulling up on outer sleeve of
quick disconnect on gauge and allowing
sleeve to return when hose is inserted.

12. Crank engine until pressure reading

stops rising on gauge.

NOTE: Crank engine at least 4
compression strokes.

13. Record compression reading.

14. Press release valve on side of

gauge

NOTE. Repeat steps 12 through 14 on
the first cylinder

15. Remove gauge from hose.

16. Hand tighten spark plug adapter

hose into a spark plug well

17. Remove hose from spark plug well

18. Repeat steps 10 through 18 for the

rest of the remaining cylinders.

19. Refer to Test Results.

.

Installation of
Compression Gauge

Release Valve

Push Release Valve to
Relieve Pressure