General Repair Information; Fuel Supply, Injection System And Charging System, Clean Working Conditions; Fuel System Leak Test; Engine Contaminants - Audi Q7 2007 Repair Manual

6-Cylinder Direct Injection 3.0L 4V TFSI Supercharged Engine - Edition 01.2016
4

General Repair Information

⇒ "4.1 Fuel Supply, Injection System and Charging System,
Clean Working Conditions", page 5
⇒ "4.2 Fuel System Leak Test", page 5
⇒ "4.3 Engine Contaminants", page 5
⇒ "4.4 Contact Corrosion", page 6
⇒ "4.5 Routing and Securing Lines", page 6
⇒ "4.6 Cooler and Condenser Assembly", page 6
⇒ "4.7 Vacuum System, Checking", page 6
4.1 Fuel Supply, Injection System and
Charging System, Clean Working Con‐
ditions
Even a little contamination can lead to faults. Observe the follow‐
ing guidelines for cleanliness when working on the fuel system,
on the injection system and on the charging system:
♦ Before loosening, connections and surrounding areas must be
cleaned thoroughly with engine or brake cleaner, and then
cleaned area must be dried completely.
♦ Seal off any open lines and connections immediately with
plugs, for example, take from Engine Bung Set - VAS6122- .
♦ Place removed parts on a clean surface and cover them with
lint-free cloths.
♦ Carefully cover or seal opened components if repairs are not
performed immediately.
♦ Install only clean parts: remove the replacement parts from
their packaging just before installing them. Do not use parts
that have been stored out of their original packaging (for ex‐
ample, in tool boxes etc.).
♦ If system is open, do not work with compressed air and do not
move the vehicle.
♦ Make sure no fuel gets onto the fuel hoses. If necessary, wipe
off the fuel hoses immediately. Replace any corroded fuel
hoses.
♦ Protect the disconnected connectors from dirt and moisture
and only connect when they are dry.
4.2

Fuel System Leak Test

– Let the engine run a few minutes at a moderate speed.
– Turn off the ignition.
– Check the entire fuel system for leaks.
– Replace the part if there are leaks in spite of correct tightening
specifications.
– Perform a road test and press the accelerator pedal all the way
down at least one time.
– Then check the high pressure area again for leaks.
4.3

Engine Contaminants

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Audi Q7 2007 ➤
4. General Repair Information
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