D 250 Pickup V8-5.9L VIN Z (1992)
Air Injection Hose/Tube: Service and Repair
Threaded Type
NOTE:
The check valve is not repairable. To determine if the valve is not functioning normally, remove the air hose from check valve inlet tube. If
exhaust gas escapes from inlet tube, the valve must be replaced. If the exhaust manifold injection tube assembly connection is leaking, remove
injection tube assembly and replace gasket material. If tube nut connection is leaking, tighten to 34-47 N-m (25-35 ft. lbs.) torque.
REMOVAL
Removal of the lower tube assembly may require removal of the upper air pump and A/C compressor.
1.
Release clamp and disconnect air hose from the check valve inlet.
2.
Unscrew the check valve from the injection tube assembly.
INSTALLATION
1.
Install check valve on tube assembly. Tighten to 34 Nm (25 ft. lbs.) torque.
2.
Install air hose to the check valve inlet and tighten clamp.