Overview - Cylinder Head
WARNING: This page is about a different car, the 2021 Audi A6 Quattro, 2020 Audi A6 Quattro, and 2019 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
- Alignment Pin
- Cylinder Head Gasket
- Always replace after removing.
- Installed position: the part number faces the cylinder head
- Cylinder Head
- Checking for distortion. Refer to Fig 5.
- Only replace together with the cylinder head cover
- Removing and installing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Bolt
- Bolt
- 9 Nm
- Heat Shield
- Bolt
- 9 Nm
- Bolt
- 9 Nm
- Connection
- For coolant hose
- O-Ring
- Always replace after removing.
- Coat with coolant
- Cylinder Head Bolt
- O-Ring
- Always replace after removing.
- Coat with coolant
- Connection
- For coolant hose
- Bolt
- 9 Nm
- Engine Lifting Eye
- Bolt
- 10 Nm + 90°
- Always replace after removing.
- Partition Plate
- Engine Lifting Eye
- Bolt
- 10 Nm + 90°
- Always replace after removing.
- Alignment Pin
Loosening the Cylinder Head
-- Remove the bolts -arrows-.
-- Loosen the cylinder head bolts in the sequence -1 to 10-.
Cylinder Head - Tightening Specifications and Sequence
- Replace the bolts that were tightened with an additional turn after removing them.
- Bolt differences:
- Bolt without collar
- Bolt with collar -arrow-
-- Tighten the bolts in the steps shown in the sequence:
| Step | Screws | Tightening Specification/Additional Turn |
|---|---|---|
| 1. | -1 through 10- | Install by hand all the way |
| 2. | -1 through 10- | "Without collar" 40 Nm "with collar" 50 Nm, difference. Refer to OVERVIEW - CYLINDER HEAD - Bolt differences: . |
| 3. | -1 through 10- | 90° additional turn |
| 4. | -1 through 10- | 90° additional turn |
| 5. | -arrows- | 10 Nm |
| 6. | -arrows- | 90° additional turn |
Cylinder Head, Checking for Distortion
-- Check the cylinder head at several locations for distortion using a :VAS6075 and a feeler gauge.
- Maximum permissible distortion: 0.05 mm