tow AUDI A8 1998 D2 / 1.G AHA ATQ Engines Valve Gear Service Manual

- Install cylinder head gasket onto guide sleeves. Marking "oben" or Part
No. must face toward cylinder head.
- Install cylinder head, install cylinder head bolts and tighten hand-tight.
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The distance between the two arrows/paint marks is equivalent to 16 drive
chain rollers.
The notch on the exhaust camshaft is slightly offset inward toward chain
roller -1-.
Note:
Do not mark chain using punch, filing a notch or similar.

- Remove camshaft adjuster retaining bolts.
- Remove bearing caps -1-,-3-,-5- and -7- and lay on a clean surface in
correct order.
- Alternating in diagonal sequence, loosen bearing caps -2- and -4- of
intake and exhaust camshafts and remove.
- Remove both camshafts together with camshaft adjuster.
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If a new drive chain is installed, distance between notches -A- and -B- on
camshafts must equal the distance between 16 drive chain rollers.
Illustration shows where first and sixteenth drive chain rollers must be
installed on chain gears.
Note:
Notch -A- is slightly offset inward toward drive chain roller -1-.
Notes: - Slide in camshaft adjuster between drive chain (second technician
required).
- Install camshafts with drive chain and camshaft adjuster into cylinder
head.
- Oil camshaft journal surface.
Alignment bushings for bearing caps and camshaft adjuster must be
installed in cylinder head. When installing bearing caps, verify marking on cap is readable from
intake side of cylinder head.
- Tighten camshaft adjuster (pay attention to alignment bushings).

- Tighten bearing caps -2- and -4- in alternating diagonal sequence (pay
attention to alignment bushings).
- Install both bearing caps on chain sprockets of intake and exhaust
camshafts.
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- Verify correct position of both camshafts.

Both camshaft markings must align with arrows on bearing caps
(arrows).

The distance between the two arrows/paint markings is equivalent to 16
drive chain rollers.
Note:
The notch on exhaust camshaft is slightly offset inward toward drive chain
roller -1-.
Pa
ge 44 of 62 Valve
gear, servicin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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yp
e=re
pair&id=AUDI.B5.GE03.15.1