RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
6
Support Ring
‹› Replace
‹› The fuel rail wields force via the support ring to hold the fuel injector tightly in the cylinder head.
7
Fuel Rail
‹› Removing and installing, refer to => [ Fuel Injectors ] See: Fuel Injector/Service and Repair
8
High-Pressure Line
CAUTION!
‹› Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure. Refer to => [
Before Opening High Pressure Fuel Injection System ] See: Fuel Filter/Fuel Pressure Release/Service and Repair.
‹› Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.
‹› Connectors should not show any signs of damage
‹› Do not change bend shape
‹› Tighten high-pressure lines => [ Hand-tighten the union nuts for the high-pressure
lines. ] See: Fuel Injector/Service and Repair
9
High-Pressure Line
CAUTION!
‹› Before opening high pressure components of the fuel injection system, pressure must be relieved to residual pressure. Refer to => [
Before Opening High Pressure Fuel Injection System ] See: Fuel Filter/Fuel Pressure Release/Service and Repair.
‹› Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.
‹› Connectors should not show any signs of damage
‹› Do not change bend shape
‹› Tighten high-pressure lines => [ Hand-tighten the union nuts for the high-pressure
lines. ] See: Fuel Injector/Service and Repair
10
Pressure Relief Valve 140 Bar
‹› For high pressure line
‹› Tighten to 25 Nm.
11
Bolt
‹› 9 Nm
‹› Fasten in diagonal sequence in steps
12
Bolt
‹› 9 Nm
‹› Fasten in diagonal sequence in steps