B350 1 Ton Van V8-5.9L VIN Z (1992)
Air Injection Hose/Tube: Service and Repair
Non-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
1.
Release clamp and disconnect air hose from check valve inlet.
2.
Remove screws or tube nut securing injection tube to exhaust manifolds or exhaust pipe.
3.
Remove the injection tube assembly from engine.
4.
Remove gasket material from exhaust manifold and injection tube flanges.
INSTALLATION
1.
Install new gaskets on exhaust manifold flanges.
2.
Install injection tube assembly.
3.
Tighten flange mounting and injection tube bracket screws to 23 Nm (200 in. lbs.) torque. On tube nut joint assemblies, install tube nut. Tighten to
34-37 Nm (24-35 ft. lbs.) torque.
