Overview - Cylinder Head

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Exploded View Of Cylinder Head

Courtesy of AUDI OF AMERICA, LLC

Cylinder Head Gasket
- Replacing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Installed position: the part number faces the cylinder head
- After replacing an adaptation must be preformed. Refer to PERFORM ADAPTATIONS AFTER COMPONENT REPLACEMENT .
Bolt
- Replace after removing
- 10 Nm +90°
Engine Lifting Eye
Partition Plate
Bolt
- Replace after removing
- 10 Nm +90°
Engine Lifting Eye
Cylinder Head
- Removing and Installing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Checking for distortion. Refer to Fig 5.
- Pay attention to the cylinder head cover pairing number and cylinder head. Refer to Fig 4.
- Change the coolant and engine oil after removing and installing
- Cap installation and installation position. Refer to Fig 6.
- After removing and installing or replacing an adaptation must be performed. Refer to PERFORM ADAPTATIONS AFTER COMPONENT REPLACEMENT .
Bolt
- Replace after removing
- Loosening. Refer to Fig 2.
- Tightening specification and sequence. Refer to Fig 3.
Bolt
- For vehicle with Particulate Filter Differential Pressure Sensor -G1037-
- 20 Nm
Bracket/Spacer Sleeve
- Bracket for vehicle with Particulate Filter Differential Pressure Sensor -G1037-
- Spacer sleeve for vehicle without bracket for the Particulate Filter Differential Pressure Sensor -G1037-
Heat Shield
Bolt
- 8 Nm
Nut
- 8 Nm
Nut
- 8 Nm
Bolt
- 10 Nm
Plug
- For vehicle with Particulate Filter Differential Pressure Sensor -G1037-
- 20 Nm
Bolt
- 9 Nm
Connection
- for coolant hose
O-Ring
- Replace after removing
- Coat with coolant
Bolt
- Replace after removing
- Loosening. Refer to Fig 2.
- Tightening Specifications and Sequence. Refer to Fig 3.
O-Ring
- Replace after removing
- Coat with coolant
Connection
- for coolant hose
Bolt
- 9 Nm
Alignment Pin
- Quantity: 2

Loosening the cylinder head

Fig 2: Cylinder Head Loosening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows-.

-- Loosen and remove the cylinder head bolts in the sequence -1 to 10-.

Cylinder Head - Tightening Specifications and Sequence

Fig 3: Cylinder Head Bolts Loosening Sequence

Courtesy of AUDI OF AMERICA, LLC

Replace bolts that were tightened with an additional turn after removing them.

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

Step	Bolts	Tightening specification/additional turn
1.	-1 through 10-	Install all the way by hand
2.	-1 through 10-	50 Nm
3.	-1 through 10-	90° additional turn
4.	-1 through 10-	90° additional turn
5.	-arrows-	8 Nm
6.	-arrows-	90° additional turn

Pairing number of the cylinder head cover and the cylinder head

Fig 4: Pairing Number of the Cylinder Head Cover and the Cylinder Head

Courtesy of AUDI OF AMERICA, LLC

Each cylinder head cover is assigned to a cylinder head with this pairing number.

Both eight digit numbers -arrows- must match: XXXXXXXX = XXXXXXXX.
For the assembly pay attention to the correct allocation.

Cylinder Head, Checking for Distortion

Fig 5: Check Cylinder Head For Distortions

Courtesy of AUDI OF AMERICA, LLC

-- Check the cylinder head at several locations for distortion using a Straight Edge - 500mm:VAS 6075 and a feeler gauge.

Maximum permitted distortion: 0.05 mm

Cap installation and installation position

Fig 6: Cap Installation and Installation Position

Courtesy of AUDI OF AMERICA, LLC

-- Before removing, determine the press-in depth -a-.

-- Coat the cap -1- all around with sealant. Refer to Parts Information.

Courtesy of AUDI OF AMERICA, LLC

-- Position the cap -1- parallel to the cylinder block and using a suitable thrust piece (for example the socket) -2- drive in to the previously determined press-in depth -a-.