Audi Q3: Overview - Belt Pulley, Valeo A/C Compressor
1 - Bolt
- The threaded bolt holes, into which the self-locking bolts or bolts
with locking compound were installed, must be cleaned (for example with
a thread tap). Otherwise, there is a danger that the bolts break off
during assembly.
- Clean the thread of the bolts, which are screwed in with locking
compound, with a wire brush. Then insert the bolts with locking
compound. For the locking compound, refer to the Parts Catalog.
2 - Bolt
- The threaded bolt holes, into which the self-locking bolts or bolts
with locking compound were installed, must be cleaned (for example with
a thread tap). Otherwise, there is a danger that the bolts break off
during assembly.
- Clean the thread of the bolts, which are screwed in with locking
compound, with a wire brush. Then insert the bolts with locking
compound. For the locking compound, refer to the Parts Catalog.
3 - Drive Plate
- Removing and installing. Refer to
→ Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".
- The overload protection takes over when the torque is excessive (for
example, if the A/C compressor runs with resistance) and the belt pulley
runs freely without driving the A/C compressor
- With rubber element for decoupling belt pulley from A/C compressor
driveshaft, dampens vibrations and noise
4 - Circlip
- Replacing
- Install on proper side, beveled insertion edge
-A- faces away from A/C compressor - install flat side faces the
A/C compressor
5 - Belt Pulley
- Removing and installing. Refer to
→ Chapter "Belt Pulley, Removing and Installing, Valeo A/C Compressor".
- The threaded bolt holes, into which the self-locking bolts or bolts
with locking compound were installed, must be cleaned (for example with
a thread tap). Otherwise, there is a danger that the bolts break off
during assembly.
6 - Air Conditioning (A/C) Compressor
- Clean the A/C compressor driveshaft before setting the belt pulley
on it
Overview - Belt Pulley, Sanden A/C Compressor, Version 1
Note
- Installed on vehicles with a 4-cylinder engine
- If the belt pulley overload protection is triggered, check
the Air Conditioning (A/C) compressor for ease of movement
before replacing the belt pulley. If the A/C compressor creates
friction, replace it completely.
- The function of overload protection for pulley is described
in, for example, the Self Study Program 240 Audi A2 Technical
Information.
- The A/C compressor can be removed and installed at the
bracket on engine without opening the refrigerant lines.
1 - Nut
- To loosen and tighten hex nut, hold the belt pulley firmly in place
using a commercially available strap wrench (with cloth tape).
- The thread of the nut, which was installed with locking compound,
must be cleaned (for example, using a thread tap). Otherwise, there is a
danger that the input shaft breaks off during assembly.
- Clean the thread of the A/C compressor input shaft with a wire
brush.
- Insert the nut with locking compound. For the locking compound,
refer to the Parts Catalog.
2 - Bolt
- Hold the belt pulley securely with a commercially available strap
wrench (with cloth tape) to loosen and tighten the bolts.
- The threaded bolt holes, into which the self-locking bolts or bolts
with locking compound were installed, must be cleaned (for example with
a thread tap). Otherwise, there is a danger that the bolts break off
during assembly.
- Clean the thread of the bolts, which are screwed in with locking
compound, with a wire brush. Then insert the bolts with locking
compound. For the locking compound, refer to the Parts Catalog.
3 - Drive Plate
- The overload protection takes over when the torque is excessive (for
example, if the A/C compressor runs with resistance) and the belt pulley
runs freely without driving the A/C compressor
- With rubber element for decoupling belt pulley from A/C compressor
driveshaft, dampens vibrations and noise
4 - Washer
5 - Circlip
- Replacing
- Install on proper side, beveled insertion edge
-A- faces away from A/C compressor - install flat side faces the
A/C compressor
6 - Belt Pulley
7 - Air Conditioning (A/C) Compressor
- Clean the A/C compressor driveshaft before setting the belt pulley
on it
Overview - Belt Pulley, Sanden A/C Compressor, Version 2
Note
- Installed on vehicles with a 4-cylinder engine
- If the belt pulley overload protection is triggered, check
the Air Conditioning (A/C) compressor for ease of movement
before replacing the belt pulley. If the A/C compressor creates
friction, replace it completely.
- The function of overload protection for pulley is described
in, for example, the Self Study Program 240 Audi A2 Technical
Information.
- The A/C compressor can be removed and installed at the
bracket on engine without opening the refrigerant lines.
1 - Nut
Note
The Air Conditioning (A/C) compressor input shaft may be covered
with a plastic cap to protect the threads on it (the plastic cap is not
illustrated).
- Hold the belt pulley securely with a commercially available strap
wrench (with cloth tape) to loosen and tighten the hex nut.
- The thread of the nut, which was installed with locking compound,
must be cleaned (for example, using a thread tap). Otherwise, there is a
danger that the input shaft breaks off during assembly.
- Clean the thread of the A/C compressor input shaft with a wire
brush.
- Insert the nut with locking compound. For the locking compound,
refer to the Parts Catalog.
2 - Bolt
- Hold the belt pulley securely with a commercially available strap
wrench (with cloth tape) to loosen and tighten the bolts.
- The threaded bolt holes, into which the self-locking bolts or bolts
with locking compound were installed, must be cleaned (for example with
a thread tap). Otherwise, there is a danger that the bolts break off
during assembly.
- Clean the thread of the bolts, which are screwed in with locking
compound, with a wire brush. Then insert the bolts with locking
compound. For the locking compound, refer to the Parts Catalog.
3 - Drive Plate
- The overload protection (securing spring elements); takes over when
the torque is excessive (for example, if the A/C compressor runs with
resistance) and the belt pulley runs freely without driving the A/C
compressor.
- Drive plate spring elements dampen vibrations and noise
4 - Circlip
- Replacing
- Install on proper side, beveled insertion edge
-A- faces away from A/C compressor - install flat side faces the
A/C compressor
5 - Belt Pulley
- With rubber elements -B- and threaded
plates -C- for decoupling belt pulley from
A/C compressor input shaft, dampens vibrations and noise
Note
- The threaded plates can also be connected to each other by a ring,
depending on the version.
- For "cold climate" vehicles (for example, central and northern
Europe), A/C compressors with a smaller displacement are installed. On
these A/C compressors, the belt pulley is slightly different from the
one illustrated here (the rubber elements -B-
are, for example, as a vibration damper not present). Refer to the Parts
Catalog.
6 - A/C Compressor
- Clean the A/C compressor driveshaft before setting the belt pulley
on it
Overview - Belt Pulley, Sanden A/C Compressor, Version 3
Note
- Installed on vehicles with a 5-cylinder engine
- If the belt pulley overload protection is triggered, check
the Air Conditioning (A/C) compressor for ease of movement
before replacing the belt pulley. If the A/C compressor creates
friction, replace it completely.
- The function of overload protection for pulley is described
in, for example, the Self Study Program 240 Audi A2 Technical
Information.
- The A/C compressor can be removed and installed at the
bracket on engine without opening the refrigerant lines.
1 - Nut
Note
The A/C compressor shaft may be covered with a plastic cap to
protect the threads on it (the plastic cap is not illustrated).
- To loosen and tighten hex nut, hold belt pulley firmly in place
using a standard band wrench (with webbing).
- Clean threads of hex nut and threads of A/C compressor shaft of old
thread locking compound before screwing on.
- Install the hex nut with thread locking compound (for example, with
D 000 600 A2). Refer to the Parts Catalog.
- Nut tightening specification: 25 Nm
2 - Bolt
- To loosen and tighten bolts, hold belt pulley firmly in place using
a standard band wrench (with webbing).
- Tightening specification 12 Nm
- Clean old bolt locking compound from thread of bolts and threads of
belt pulley before screwing on.
- Install the bolts with thread locking compound (for example, D 000
600 A2). Refer to the Parts Catalog.
3 - Drive Plate
- the overload protection (securing spring elements), takes over when
the torque is excessive (for example, if the A/C compressor runs with
resistance) and the belt pulley runs freely without driving the A/C
compressor.
- Drive plate spring elements damp vibrations and noise.
4 - Spacer
5 - Circlip
- Replace
- Install on proper side, beveled insertion edge
-A- faces away from A/C compressor (install flat side facing the
A/C compressor)
- When installing the circlip, note that it cannot be bent open more
than is necessary for installation.
6 - Belt pulley with double belt guide
- Clean A/C compressor flange before sliding on pulley.
- With rubber elements -B- and threaded
plates -C- for decoupling belt pulley from
A/C compressor input shaft (rubber elements damp vibrations and noise).
Note
- The threaded plates -C- can also be
connected to each other by a ring, depending on the version.
- On 5-cylinder vehicles (Audi RS Q3), 2 belts are guided over the
belt pulley.
7 - A/C Compressor
- There are different versions depending on engine installed and the
market. Refer to the Parts Catalog.
- Clean A/C compressor flange before sliding on pulley.
READ NEXT:
A/C Compressor, Removing and Installing from Bracket, 4-Cylinder Engine
Note
The Air Conditioning (A/C) compressor can be removed and
installed at the bracket without opening the refri
Special tools and workshop equipment
required
Wrench - Door Adjusting - Joint -3320/1-
Engine Bung Set -VAS6122-
WARNING
Danger due to refrigerant coming out under pressure.
Dan
Belt Pulley, Removing and Installing, Denso A/C Compressor, Version 1
Note
Belt pulley is sensitive to impact. Handle it with special
care
If the belt pulley overload protection acti
SEE MORE:
General information
Applies to: vehicles with lane departure warning
The lane departure warning can detect lane
marker lines within the limits of the system. If
you are approaching a detected lane marker and
it appears likely that you will leave the lane, the
system can warn you with corrective stee
Overview - Roof Railing
1 - Nut
Quantity: 4
Install with locking compound. For the correct locking compound,
refer to the Parts Catalog.
Tightening sequence. Refer to
→ Fig. "Roof Rail - Tightening Specification and Sequence"
2 - Balancing Element
Quan