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Mazda CX-5 Service & Repair Manual: Compression Inspection

Mazda CX-5 Service & Repair Manual / Engine / General / Compression Inspection

WARNING:

1. Verify that the battery is fully charged..

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

3. Perform “Fuel Line Safety Procedures”..

4. Remove the following parts.

a. Plug hole plate..

b. Ignition coil/ion sensors..

c. Spark plugs..

d. Fuel pump relay

e. Fuel injector relay

5. Measure the compression pressure using the following procedure.

a. Press a compression gauge into the spark plug hole.


b. Fully depress the accelerator pedal.

c. Crank the engine and measure the compression pressure.

NOTE:

d. Perform Steps (1) to (3) for all cylinders.

e. If it is less than the minimum specification, or there is a cylinder with a maximum value that exceeds the other cylinders, add a small quantity of engine oil through the spark plug hole and perform Steps (1) to (3).

f. If the measured value is high, it is possible that there is an error in the electric variable valve timing system.

6. Remove the compression gauge.

7. Install the following parts.

a. Fuel injector relay

b. Fuel pump relay

c. Spark plugs..

d. Ignition coil/ion sensors..

e. Plug hole plate..

General
...

Compression Inspection
WARNING: Hot engines and oil can cause severe burns. Be careful not to burn yourself during removal/installation of each component. Fuel vapor is hazardous. It can very easily ignit ...

Other materials:

Negative Battery Cable Disconnection/Connection [Skyactiv G 2.0]
WARNING: Before removing the SRS air bag system-related parts, always disconnect the negative battery cable and wait for 1 min. or more to allow the back-up power supply to deplete its stored power.. Required procedure after negative battery cable disconnection/connection ...

Crankshaft, Main Bearing
Purpose, Function The crankshaft converts the reciprocating movement of the piston to a rotational movement via the connecting rod. The main bearing forms an oil film on the outer surface of the crankshaft journal to prevent wear due to sliding. Construction Crankshaft ...

Fuel Line Pressure Inspection
WARNING: Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped. Fuel is very flammable liquid. If fuel spills or leaks ...

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