Mazda CX-7 2007 Workshop Manual page 403

40. Install the ventilation hose.
41. Connect the wiring harness.
42. Install the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
43. Install the high pressure fuel pump. (See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
44. Install the charge air cooler. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH TC].)
45. Install the splash shield (RH).
46. Connect the negative battery cable.
End Of Sie
COMPRESSION INSPECTION[L3 WITH TC]
Warning
• Hot engines can cause severe burns. Be careful not to burn yourself during removal/installation of
each component.
• Fuel vapor is hazardous. It can very easily ignite, causing death, serious injury, or damage. Always
keep sparks and flames away from fuel.
1. Verify that the battery is completely charged. (See01-17-2 BATTERY INSPECTION[L3 WITH TC].)
2. Warm up the engine.
Warning
• Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can easily ignite
and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent
this, always perform the Fuel Line Safety Procedure. (See01-14-4 BEFORE REPAIR
PROCEDURE[L3 WITH TC].)
3. Remove the charge air cooler.
4. Remove the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
5. Remove all the spark plugs. (See01-18-3 SPARK PLUG REMOVAL/INSTALLATION[L3 WITH TC])
6. Remove the fuel pump relay. (See01-14-4 BEFORE REPAIR PROCEDURE[L3 WITH TC].)
7. Remove the fuel injector relay.
8. Measure the compression pressure using the following procedure.
(1) Press the compression gauge into the spark
plug hole.
(2) Fully open the throttle valve.
(3) Crank the engine and measure the
compression pressure.
Compression
Standard: 1,280 kPa {13.1 kgf/cm
psi} [250rpm]
Minimum: 896 kPa {9.14 kgf/cm
[250rpm]
Maximum difference between cylinders:
196.1 kPa {2.0 kgf/cm
(4) Perform Steps (1) to (3) for all cylinders.
(5) If it is less than the minimum specification, or there is a cylinder with a compression value that differs from
that of other cylinders by 196.1 kPa or more {2.0 kgf/cm
through the spark plug hole and perform Steps (1) to (3).
• If the pressure increases by adding the engine oil, the piston ring or the cylinder surface is worn, or they
are damaged. Perform overhaul servicing.
• If the pressure does not increase, valve seizure, valve attachment failure, or pressure leakage from the
cylinder head gasket might be occurring. Perform overhaul servicing.
9. Install the fuel injector relay.
10. Install the fuel pump relay. (See01-14-4 BEFORE REPAIR PROCEDURE[L3 WITH TC].)
11. Install the spark plugs. (See01-18-3 SPARK PLUG REMOVAL/INSTALLATION[L3 WITH TC])
12. Install the ignition coils. (See01-18-2 IGNITION COIL REMOVAL/INSTALLATION[L3 WITH TC].)
13. Install the charge air cooler.
End Of Sie
WM: TIMING CHAIN
MECHANICAL [L3 WITH TC]
2
, 185.65
2
, 129.96 psi}
2
, 28.5 psi}
2
, 28.5 psi}, add a small quantity of engine oil
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