4
11. Remove engine lift bracket (if necessary).
12. Carefully remove each fuel line from engine. Note position of each while removing.
13. Disconnect plenum air temperature sensor connector.
14. Remove the intake plenum air temperature sensor.
15. Remove the remaining intake plenum cover-to-cylinder head bolts.
16. Remove the intake plenum cover and gasket. Keep the gasket material and any
other material out of the air intake!
17. Clean the cylinder head sealing surface.
AIR-BOSS 67 INTAKE PLENUM INSTALLATION
18. Using the new gasket, install the Air-Boss 67 plenum.
19. Install the cover-to-cylinder head bolts that do not hold down the fuel rail. Tighten
the bolts to
18 ft. lbs.
torque.
20. Install the intake plenum air temperature sensor. The stock sensor has a crush
washer and can be reused. If you so choose we have included an O-ring to replace
the crush washer on the sensor. To install using the supplied O-ring remove the
stock crush washer by cutting with a pair of wire cutters and roll on the new O-ring.
21. Check torque on the high pressure crossover tube connector nut at the cylinder
head.
Torque nut to 50 N·m (37 ft. lbs).
Installing the High Pressure Rail and Injector Lines
22. Position fuel rail on top of the Air-Boss 67 using the four (4) supplied rail spacers.
Install the four (4) mounting bolts and tighten bolts to 24 N·m (18 ft. lbs) torque.
CAUTION: Anytime a high-pressure line is removed from the engine, its fuel
connector nut at the cylinder head must first be retorqued. Refer to Torque
Specifications.
23. Position proper fuel line to proper injector on engine. Tighten fittings hand tight at
both ends of line.
24. Tighten fuel line at cylinder head.
Torque nut to 30 N·m (22 ft. lbs).
25. Tighten fuel lines at fuel rail.
Torque nut to 37 N·m (27 ft. lbs).
