Injection System

Fig 1: Injection System Component Location With Torque Specification - V8 Biturbo

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Injection system - V8 biturbo

1	High-pressure pump
2	High-pressure pump piston
3	Screws, M6 x 22 > Tightening torque 12 Nm (9 ftlb.)
4	Fuel collection pipe
5	Screws, M6 x 16/observe tightening sequence! > Initial tightening 7 Nm (5 ftlb.) > Final tightening 10 Nm (7.5 ftlb.)
6	Fuel collection pipe
7	Fuel pressure sensor for high pressure > Tightening torque 20 Nm (15 ftlb.)
8	High-pressure fuel line /coat thread on union nuts with Microgleit DF 977S. Observe drying time of at least 5 minutes before fitting. /Observe tightening sequence
9	Clamp
10	Screw, M6 x 12 > Tightening torque 9 Nm (6.5 ftlb.)
11	Fuel pressure sensor for low pressure
12	Low-pressure fuel line (supply)
13	Screw, M6 x 16 > Tightening torque 9 Nm (6.5 ftlb.)
14	Clamp
15	Fuel pressure sensor for high pressure > Tightening torque 20 Nm (15 ftlb.)
16	Low-pressure fuel line (connection to high-pressure pumps) /coat thread on union nuts with Microgleit DF 977S. Observe drying time of at least 5 minutes before fitting. /Observe tightening sequence
17	Clamps
18	Screw, M6 x 16
19	High-pressure fuel line /coat thread on union nuts with Microgleit DF 977S. Observe drying time of at least 5 minutes before fitting. /Observe tightening sequence
20	Fuel injectors

Heat shield for high-pressure pump

Fig 2: Heat Shield For High-Pressure Pump Component Location With Torque Specification (Illustration On Left)

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Heat shield for high-pressure pump (illustration on the left)

1	Screw, M6 x 12 > Tightening torque 9 Nm (6.5 ftlb.)
2	Screw, M6 x 25 > Tightening torque 9 Nm (6.5 ftlb.)
3	Heat shield