AUDI A4 1997 B5 / 1.G Suspension Subframe Remove And Install Workshop Manual

40-77


Subframe, removing and
installing

WARNING!

Do not re-use any fasteners that are worn or
deformed in normal use.
Some fasteners are designed to be used only
once, and are unreliable and may fail if used
a second time. This includes, but is not
limited to, nuts, bolts, washers, circlips and
cotter pins. Always follow the
recommendations in this manual-replace
these fasteners with new parts where
indicated, and any other time it is deemed
necessary by inspection.

Special tools, test equipment and auxiliary
items
10-222A Engine support bridge 10-222/1
3393

Removing

- Support engine using engine support bridge.
- Remove wheel trim.
On light alloy wheels use puller in vehicle tool kit to remove trim cap.
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- Remove wheels.
- Remove noise insulation panel.
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- Before loosening subframe, use 3393 testing mandrel to make sure
that holes -1- and -2- are aligned.
- If holes -1- and -2- are not aligned, carry out wheel alignment after
installing subframe.
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CAUTION!

Install a support device (e.g. VAG1383A
transmission jack) to prevent damage to the
lower link joints resulting from excessive
rebound travel in the suspension.

- Remove nuts -3-.
- Loosen bolts -1- (attaching lower guide links to subframe).

- Remove bolts -1-.
- Remove bolts -2- and lower subframe at rear.
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Note:
To prevent the outer joints on the lower track
control link and guide link from being bent too far,
secure the links to the car body using a piece of
wire or similar.

- Remove bolts for lower guide links.

- Remove lower guide links from subframe.

Note:
For vehicles with headlight range control page 40
-14
. - Remove bolts -5-.
- Remove nuts -2- (attaching lower track control links to subframe) and
remove bolts.
- Disconnect ABS wheel speed sensor wiring from retainers on brake
calipers.

- Remove lower track control links from subframe.
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- Remove nuts -3- and -4-.
- Remove bolts -5-.
- Loosen bolts -6- until subframe can be removed.
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Installing

All nuts and bolts must be replaced

- Install subframe; install bolts -5- and -6- hand-tight.
- Install bolts securing suspension struts to lower track control links.

Note:
For vehicles with headlight range control page 40
-14
. - Install lower track control links and lower guide links in subframe.
- Install bolts in inner holes (arrows).
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Before tightening, 3393 testing mandrel must
be installed to align subframe to body

Notes:
Hole -1-, subframe hole -2- and aluminium bracket hole -3- must align
on both sides When installing the complete subframe, the 3393 testing mandrel can
be used to align the subframe to the body only if holes -1- and -2-
were aligned before the repairs were made. If the 3393 testing mandrel is not used when installing the subframe or
if holes -1- and -2- did not align before repairs were made a wheel
alignment will need to be carried out.

- Loosely install bolts -1- and -2-.
- Loosely install bolts -3- and -4-.
- Carry out corrosion protection measures, as needed, to holes used for
3393 testing mandrel.
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Tightening sequence

CAUTION!

The bonded rubber bushings can only be
turned to a limited extent. The bolted
connections on the suspension links should
therefore only be tightened when the vehicle
is standing on the ground.

-
Tighten bolts -2- and -5- to 110 Nm (81 ft lb) + 1/4-turn (90 ).- Tighten bolts -6- to 75 Nm (55 ft lb).
- Tighten bolts -1- to 23 Nm (17 ft lb).
- Tighten nuts -3- and -4- to 40 Nm (30 ft lb).
- Tighten bolts for lower track control link to 80 Nm (59 ft lb) + 1/4-turn
(90 ). -
Tighten guide link bolts to 90 Nm (66 ft lb) + 1/4-turn (90 ).- Attach coupling link to stabilizer bar using new ribbed nuts and tighten
to 100 Nm (74 ft lb).
- Attach suspension strut to lower track control link.
Tightening torque: 90 Nm (66 ft lb)
- Install ABS wheel speed sensor wiring into retainer on brake caliper.
- Install wheels.
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Lower cross member, removing and
installing


From m.y. 1998 , various subframes ( parts
catalog microfiche) are equipped with a lower
cross member.

1 - Bolts M10 x 22

Tightening torque: 40 Nm (30 ft lb) +1/4-turn (90 )2 - Cross member
3 - Nuts
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