Overview - Piston And Connecting Rod

WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Oil injector jet for piston cooling, refer to Fig 5.

Fig 1: Overview Of Piston And Connecting Rod Components

Courtesy of AUDI OF AMERICA, LLC

Bolts
- 30 Nm + 90° turn
- Replace
- Use old bolts to measure radial play.
- Lubricate the thread and contact surface.
Connecting Rod Bearing Cap
- Mark for installation later
- Mark allocation to the cylinder with paint -B-, refer to Fig 3.
- Note when installing the bearing cap: the wide thrust flange -A- must point to the same side on connecting rod and connecting rod bearing cap
- Installation position of connecting rod pairs, refer to Fig 4
Bearing Shell
- Make sure the tabs are tight
- Mark used bearing shells for reinstallation but not on the running surface
- Replace the bearing shells worn down to the base layer
- Radial play, measuring, refer to CONNECTING RODS, CHECKING RADIAL CLEARANCE .
Connecting Rod
- Always replace as a set.
- Mark allocation to the cylinder with paint -B-, refer to Fig 3.
- Note when installing the bearing cap: the wide thrust flange -A- must point to the same side on connecting rod and connecting rod bearing cap
- Installation position of connecting rod pairs, refer to Fig 4
Piston Pin
- Heat piston to 60 °C (140 °F) if it is difficult to move.
- Remove and install using the Pilot Drift VW222A
Circlip
- Replace
Piston
- Mark the installation position and cylinder allocation, refer to Fig 2
- Arrow on piston face points toward belt pulley side
- Checking, refer to Figure.
- Install with piston ring compressor
- Measuring cylinder bore, refer to Figure
Piston Rings
- Offset gaps by 120°
- Use piston ring pliers for removing and installing
- Installed position: "TOP" marking or side with writing faces the piston crown.
- Measuring the gap, refer to Figure.
- Measuring side clearance, refer to Figure.

Fig 2: Marking Piston Crowns With Paint

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

The coating on the piston crown could be destroyed.

Mark the allocation to the cylinder on the piston crown with paint to install used pistons. Do not mark the piston crown with a punch, notch or similar object.

Installed position:

The arrows on the piston heads point to the belt pulley side.

NOTE:

Only replace the connecting rods as a set.

-- Mark the connecting rod and connector rod bearing caps to each other and to the cylinder -arrow- with paint for installation.

Fig 3: Arrows On Piston Heads Point To Belt Pulley Side

Courtesy of AUDI OF AMERICA, LLC

The molded tabs -arrows- on the beveled surfaces of the connecting rod pairs "1 and 2", "3 and 4" and "5 and 6" must face each other.

Fig 4: Connecting Rod Molded Tabs Installed Location

Courtesy of AUDI OF AMERICA, LLC

Fig 5: Identifying Oil Spray Jet And Bolt

Courtesy of AUDI OF AMERICA, LLC

Insert the bolt with locking compound and tighten to 9 Nm. Allocate correct locking compound.
Oil spray jet with spray nozzle valve (opening pressure 2.0 to 2.4 bar (29 to 34.8 psi))

NOTE:

Do not bend the oil spray nozzles.

Replace the oil spry nozzles if they are bent.