Test sequence

WARNING: This page is about a different car, the 2003 Audi RS 6. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.

Remove air filter housing. See AIR FILTER HOUSING, REMOVING AND INSTALLING .
Remove bolts -1- to -3-. See Fig 1.
Disconnect hose for right crankshaft housing ventilation at position indicated by (arrow).
NOTE: Disregard -item 4-.

Fig 1: Removing Bolts

Courtesy of AUDI OF AMERICA, INC.

Remove pressure regulator valve and disconnect hose for crankshaft housing ventilation at left cylinder head.
Unplug electrical connectors on both sides from:
1. Injectors -N30- ... -N86- (8x)
2. Ignition coils -N- ... -N191- (8x)
Fig 2: Disconnecting Electrical Connectors From Injectors And Ignition Coils
Courtesy of AUDI OF AMERICA, INC.

Remove ignition coils.
Remove spark plugs with spark plug wrench 3122B.
CAUTION: Remove foam pads installed during air filter housing removal procedure prior to performing compression test.
Fully open throttle valve.
Check compressions with compression tester V.A.G 1763.
Operate starter until tester shows no further pressure increase.

Compression pressure:

COMPRESSION PRESSURE SPECIFICATIONS

New bar	Wear limit bar	Difference between cylinders bar
10.0 to 13.0	7.0	max. 3.0

Installation is carried out in reverse sequence - note following points:

NOTE: During installation, all cable ties must be re-installed at the same locations.

Install air filter housing. See INSTALLING .