Engine Compression Test (1.6L LLU)

/ 9-5 (9650) / 2011 / 2. Engine / Basic engine, 1.6 l petrol / Fault diagnosis, fault symptoms / Engine Compression Test (1.6L LLU)

Removal Procedure

1.	Remove the throttle body. Refer to Throttle Body Assembly Replacement .

2.	Remove the spark plugs. Refer to Spark Plug Replacement .

3.	Remove the relay holder cover.

4.	Remove the fuel pump relay. Draw relay K3 out of mounting plug.

Measurement Procedure

Compression, Check

•	4 cylinder

•	Note Engine revs at least 300/min. Start the engine (approx. 4 seconds).

•	Compare the compression values. Maximum pressure differential 100 kPa (14.5 psi)

Installation Procedure

1.	Install the fuel pump relay.

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Place into the socket.

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Ensure the plug contacts are sound.

2.	Install the relay carrier cover.

3.	Install the spark plugs. Refer to Spark Plug Replacement .

4.	Install the throttle body. Refer to Throttle Body Assembly Replacement .

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