Mercury XS8Z-9D475-DA Valve - Exhaust Gas Recirculation

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The EGR valve is on the exhaust manifold, connected to the throttle housing by a pipe. The solenoid valve is on the firewall, connected to the EGR valve and brake booster vacuum hose. To remove it, disconnect the hoses and wiring plug, unscrew the bolts, and access the EGR valve by removing the air cleaner outlet tube and disconnecting the coolant hose. Disconnect the vacuum hose, loosen the clamp nut, unscrew the bolts, and remove the valve. If present, the differential pressure sensor is next to the solenoid valve. To remove the EGR valve supply pipe, remove the EGR valve, separate the joint, remove the engine lifting eye, loosen the EGR pipe clamp bolt, disconnect the wiring plugs, and release the brake booster vacuum pipe connection. Installation is the reverse of removal.