Aerio L4-2.3L (2006)
Compression Check: Testing and Inspection
Compression Check
Check compression pressure on all 4 cylinders as follows:
1. Warm up engine.
2. Stop engine after warming up.
NOTE: After warming up engine, place transmission gear shift lever in "Neutral" (shift selector lever to "P" range for A/T model), and set
parking brake and block drive wheels.
3. Remove engine cover.
4. Disconnect ignition coil couplers.
5. Disconnect ignition coils (1).
6. Remove all spark plugs (2).
7. Disconnect fuel injector wire harness at the coupler.
8. Install special tool (Compression gauge) into spark plug hole.
Special Tool
(A): 09915-64510-001
(B): 09915-64510-002
(C): 09915-64530
(D): 09915-67010
9. Disengage clutch (to lighten starting load on engine) for M/T vehicle, and depress accelerator pedal all the way to make throttle fully open.
10. Crank engine with fully charged battery, and read the highest pressure on compression gauge.
NOTE: For measuring compression pressure, crank engine at least 250 rpm by using fully charged battery.
