Overview - Cylinder Head

WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The cylinder head for cylinder bank 2 (left) is shown in the illustration.

Fig 1: Identifying Cylinder Head Overview

Courtesy of AUDI OF AMERICA, LLC

Cylinder Head Gasket
- Replacing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Installed position: Parts number to cylinder head
- Change the coolant and engine oil after replacing
Cylinder Head
- Removing and installing, refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Check for distortion, refer to Fig 3
- Reworking dimension, refer to Fig 4
- Change the coolant and engine oil after replacing
O-Ring
- Replacing
Front Coolant Pipe
- Removing and installing, refer to FRONT COOLANT PIPE, REMOVING AND INSTALLING .
Bolt
- Tightening specification -item 17- OVERVIEW - COOLANT PIPES => List Item:Bolt .
Bolt
- 22 Nm
Engine Lifting Eye
Bolt
- Replacing
- Loosening sequence, refer to Loosen the cylinder head bolts in the sequence -1 to 10- .
- Tightening specification and sequence, refer to Fig 2.
Bolt
- 22 Nm
Engine Lifting Eye
Bolt
- Replacing
- Loosening sequence, refer to Loosen the cylinder head bolts in the sequence -1 to 10-
- Tightening specification and sequence, refer to Fig 2.
Oil Screen
- Clean
Partition Plate

Fig 2: Cylinder Head - Tightening Specification and Sequence

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Replace any bolts that were tightened with an additional turn.

The cylinder head for cylinder bank 2 (left) is shown in the illustration.

-- Tighten the bolts in steps in the sequence shown:

Step	Bolts	Tightening specification/additional turn
1.	-1 through 10-	Install all the way in by hand.
2.	-1 through 10-	30 Nm
3.	-1 through 10-	60 Nm
4.	-1 through 10-	Tighten an additional 90°
5.	-1 through 10-	Tighten an additional 90°
6.	-Arrows-	10 Nm
7.	-Arrows-	Tighten an additional 90°

Fig 3: Checking Cylinder Head Distortion

Courtesy of AUDI OF AMERICA, LLC

-- Check the cylinder head at several locations for distortion using a Straight Edge - 500mm VAS6075 and a feeler gauge.

Maximum permissible distortion: 0.1 mm.

Fig 4: Identifying Cylinder Head Refacing Dimension

Courtesy of AUDI OF AMERICA, LLC

Resurfacing cylinder head (face grinding) is only permissible to minimum dimension -a-.

Minimum dimension -a- = 139.5 mm.