1997 AUDI A4 ECU

13-2


Repair Manual, Body Exterior, Repair Group 63
- Remove front bumper.
- Remove 3 quick-release screws on front of noise
insulation panel.
- Unbolt air guide between lock carrier and air filter
at lock carrier.
- If installed, remove retaining clamps for wiring
harness on left side of radiator frame.
- Remove bolt -2- and install 3369 support tool.
- Install 3369 support tool into left bore -5-.
- Remove bolts -1- and -3-.
- Remove bolts -4- and pull lock carrier out to
stop.
- To secure lock carrier, install appropriate M6
bolts into rear bored holes of lock carrier -6- and
fender -7-.
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13-5


5 -
Ribbed belt
Removing and installing Page 13
-15
Check for wear
6 -
Special bolt Tighten to 40 Nm (30 ft lb)Only use VW bolts, bolt strength grade
10.9 parts catalog
7 -
Vibration damper
With pulley for ribbed beltInstallation only possible in one position
Page 13
-14
, Fig. 2

8 -
Bolt for ribbed belt tensioner
25 Nm (18 ft lb)
9 -
Ribbed belt tensioner To release tension on the ribbed belt, use
open-end wrench Page 13
-15

Secure with appropriate hex socket or
3204 drift in positioning bore
10 -
Belt pulley For viscous fanRemoving and installing Page 13
-14
,
Fig. 1

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13-11


CAUTION!
Do not let A/C compressor hang by refrigerant
lines. 5 -
Bracket
For A/C compressor
6 -
Ribbed belt tensioner Removing and installing Page 13
-15
7 -
Washer
8 -
Bolt
20 Nm (15 ft lb)
9 -
Ribbed belt Removing and installing Page 13
-15
Check for wear
10 -
A/C compressor After removing, secure A/C compressor to
long member (i.e. using wire).
11 -
Washer
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13-14


Fig. 1 Viscous fan, removing and installing
Lock carrier in service position Page 13
-1
Ribbed belt free of tension Page 13
-15

- Secure belt pulley for viscous fan with 5 x 60 mm bolt and remove
using hex socket wrench.
- Remove viscous fan.
- When installing viscous fan, tighten to 45 Nm (33 ft lb).

Installation is only possible in one position: the bore hole of the vibration
damper (arrow) must align with raised portion of toothed belt gear. Fig. 2 Install vibration damper
Lock carrier in service position Page 13
-1
Ribbed belt removed Page 13
-15

- Install vibration damper using only original equipment bolts (bolt
strength grade 10.9) parts catalog. - Tighten vibration damper bolts to 40 Nm (30 ft lb).
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13-26


14 -
Connecting bolt
25 Nm (18 ft lb)For tensioner
15 -
Rear toothed belt cover
16 -
Bolt 20 Nm (15 ft lb)
17 -
Intermediate shaft gear
18 -
Washer
19 -
Toothed belt gear for crankshaft Contact surface between toothed belt gear
and crankshaft must be free of oil Installation only possible in one position
20 -
Bolt for toothed belt gear for crankshaft Always replace90 Nm (66 ft lb) + additional 1/4 turn (90 )Do not oilUse 3099 retainer for loosening or
tightening Attach 3099 retainer Page 13
-39
To secure retainer, remove torque support
bracket Page 17
-2 , item 5
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13-32

Installing (adjust valve timing)

Note:

Use the following procedure to adjust toothed
belt, even for repairs that only require removal
of toothed belt from camshaft gear.
Adjustments can be made on a hot or cold
engine.

CAUTION!

When turning camshaft, crankshaft may not
be at TDC for any cylinder. Valves and/or
piston heads may be damaged.

- Align marking on camshaft gear to marking on cylinder head cover.
- Place toothed belt on crankshaft gear noting direction of rotation.
- Install lower toothed belt cover.
- Using a bolt, secure vibration damper/belt pulley (note locating point).
- Set crankshaft to TDC Cyl. 1 position.
- Place toothed belt on belt tensioner and camshaft gear.
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