Check Valve Inspection - Mazda CX-7 2007 Workshop Manual

CHECK VALVE INSPECTION[L3 WITH TC]
1. Remove the charge air cooler duct.
2. Disconnect the vacuum hose connected between the check valve and the purge solenoid valve from the purge
solenoid valve.
3. Disconnect the vacuum hose connected between the check valve and the intake manifold from the intake
manifold.
4. Blow through the check valve and verify that air flows as specified.
• If not as specified, replace the check valve.
Specification
Condition
Air applied from port A to B
Air applied from port B to A
* : The check valve is normal if the aeration to port B
is 3.5 kPa/min {0.03 kgf/cm2 min, 0.5 psi/min}
or less when 130 kPa {1.32 kgf/cm2, 18.9 psi}
is applied to port A.
End Of Sie
WM: EGR VALVE
EGR VALVE REMOVAL/INSTALLATION[L3 WITH TC]
1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct.
3. Disconnect the EGR valve connector.
4. Remove the air hose and air duct. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH
TC])
5. Drain the engine coolant. (See01-12-5 ENGINE COOLANT REPLACEMENT[L3 WITH TC].)
6. Remove in the order indicated in the table.
7. Install in the reverse order of removal.
1 Water hose
2 EGR valve
End Of Sie
EMISSION SYSTEM [L3 WITH TC]
Airflow
Yes
No*
PORT B
2
R
1
id011639801400
01-16
PORT A
acxuuw00000214
id011639801000
20—30 N·m
{2.1—3.0 kgf·m,
15—22 ft·lbf}
acxuuw00000511
01-16–11