A6 Quattro Sedan V6-3.2L (BKH) (2005)
Fuel Injector: Service and Repair
Fuel Injectors
Special tools, testers and auxiliary items required
‹› Tool set (T10133)
High-Pressure Fuel Injector - Component Overview
1. Radial adjustment - Replace if damaged
2. Combustion chamber seal (Teflon seal) - replace, the seal must not be greased or be handled with any other lubricant during installation
3. Groove on fuel injector
4. Spacer ring - Replace if damaged
5. O-ring - replace, lightly coat with clean engine oil during installation
6. Support ring - fuel rail wields force via support ring to hold fuel injector tightly in cylinder head
Removing
CAUTION!
‹› Fuel system is under high pressure! Before opening high pressure components of the fuel injection system, pressure must be relieved
to residual pressure => [ High-Pressure Fuel Injection System, Pressure Relief ] 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.
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Remove upper part of intake manifold => [ Upper Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and
Repair/Removal and Replacement/Upper Intake Manifold.
-
Remove corresponding intake manifold lower-part => [ Lower Intake Manifold with Fuel Rail ] See: Engine, Cooling and Exhaust/Engine/Intake
Manifold/Service and Repair/Removal and Replacement/Lower Intake Manifold with Fuel Rail.
If fuel injectors cannot be pulled out of cylinder head by hand, proceed as follows: