Mazda CX-9 Grand Touring 2009 Manual page 1437

OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7]
1. Disconnect the negative battery cable.
2. Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7].)
3. Remove the ventilation hose. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM)
REMOVAL/INSTALLATION [MZI-3.7] .)
4. Disconnect the vacuum hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-
3.7] .)
5. Remove the resonance chamber. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-
3.7] .)
6. Remove the dynamic chamber and throttle body as a single unit. (See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION [MZI-3.7] .)
7. Disconnect the wiring harness.
8. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZI-3.7] .)
9. Remove the dipstick.
10. Remove the cylinder head cover. (See TIMING CHAIN REMOVAL/INSTALLATION [MZI-3.7].)
11. Remove the OCV.
NOTE:
Tightening torque: 8.5-11.5 N.m {87-117 kgf.cm, 76-101 in.lbf}
12. Install in the reverse order of removal.
Fig. 37: Identifying OCV & Bolt
Courtesy of MAZDA MOTORS CORP.
COMPRESSION INSPECTION [MZI-3.7]
WARNING:
2008 Mazda CX-9 Grand Touring
2008 ENGINE Mechanical (MZI-3.7) - Mazda CX-9
The LH side is shown, however, the RH side is the same.
Hot engines and oil can cause severe burns. Turn off the engine and
wait until they are cool.