Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

Special tools and workshop equipment required

t	Spark plug socket and extension -3122 B-

t	Compression tester -V.A.G 1763-

t	Puller -T40039- for vehicles with push-fitted ignition coils

Procedure l  Engine oil temperature at least 30 °C. l  Battery voltage at least 12.5 V. –  Take off engine cover panel -arrows-.

–  Unplug electrical connectors -1- on injectors. –  Unscrew vacuum reservoir, disengage and move clear to one side.

–  Disconnect earth cable -2-. –  Detach electrical connectors -1-. Vehicles with bolted on ignition coils: –  Unbolt ignition coils -3-.

Vehicles with push-fitted ignition coils: –  Pull ignition coils out with puller -T40039-. All models: –  Remove spark plugs with spark plug socket -3122 B-. –  Test the compression pressure with the compression tester -V.A.G 1763-.   Note Using the compression tester → operating instructions. –  Have a 2nd mechanic press down the accelerator pedal completely and simultaneously operate the starter until the pressure no longer increases on the tester display.

Compression pressure	bar
When new	10.0 … 13.0
Wear limit	7.0
Difference between cylinders	max. 3.0

Installation is carried out in the reverse order; note the following: –  Install spark plugs and ignition coils → Rep. Gr.28.   Note Renew gaskets for bolted on ignition coils if damaged. –  Interrogate and erase the fault memory for engine control unit, as faults are stored when the electrical connectors are unplugged → Vehicle diagnosis, testing and information system VAS 5051. Tightening torque

Component	Nm
Vacuum reservoir to cylinder head	10