Overview - Cylinder Head: Notes

WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, and 2013 Audi Q7. 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 Seal
- Replacing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Identification. Refer to Fig 3.
- Installed position: the part number faces the cylinder head
- Change the coolant and engine oil after replacing
Cylinder Head
- Only set the removed cylinder head down on a foam pad. Otherwise the glow plugs can be damaged.
- Removing and installing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Check for distortion. Refer to Fig 2
- It is not permitted to re-work the cylinder heads on TDI engines
- Change the coolant and engine oil after replacing
Bolt
- 23 Nm
Bracket
Engine Lifting Eye
Bolt
- 23 Nm
Seals
- Replace
Banjo Bolt
- Tightening specification -Item 15- OVERVIEW - COOLANT PIPE ON ENGINE .
Coolant lines
Bolt
- Tightening specification -Item 17- OVERVIEW - COOLANT PIPE ON ENGINE .
Banjo Bolt
- Tightening specification -Item 18- OVERVIEW - COOLANT PIPE ON ENGINE .
Seals
- Replace
Bolt
- 23 Nm
Engine Lifting Eye
Bolt
- Loosening sequence. Refer to Removing
- Replace
- Tightening specification and sequence. Refer to OVERVIEW - CYLINDER HEAD .

Fig 2: Checking Cylinder Head Distortion

Courtesy of AUDI OF AMERICA, LLC

-- Check the cylinder head at several locations for distortion using a Straight Edge - 500mmVAS6075 and a feeler gauge.

Maximum permissible distortion: 0.1 mm.

NOTE:

It is not permitted to re-work the cylinder heads on TDI engines

Fig 3: Cylinder Head Gasket Identification

Courtesy of AUDI OF AMERICA, LLC

Part number
Holes

NOTE:

Depending on piston projection, varying cylinder head gasket thicknesses can be installed. Refer to PISTON PROJECTION, MEASURING AT "Top Dead Center (TDC)" . If replacing the cylinder head gasket, make sure the new cylinder head gasket with the same identification.

The cylinder head gaskets for the left and right cylinder head cannot be interchanged because they each have a different shape.