Overview - Cylinder Head

WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Replace the cylinder head bolts.

Always replace self-locking nuts and bolts that have been tightened with an additional turn, along with gaskets and seals.

The plastic protectors installed to protect the open valves must only be removed immediately before mounting the cylinder head.

The engine oil and the coolant must be changed if the cylinder head or the cylinder head gasket are being replaced.

Fig 1: Cylinder Head Exploded View

Courtesy of AUDI OF AMERICA, LLC

Alignment Pin
Cylinder Head Gasket
- Replace
- Installed position: the part number faces the cylinder head
Cylinder Head
- Removing and Installing. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .
- Checking for distortion. Refer to Fig 4.
Bolt
- Replace
- Follow the procedure when loosening. Refer to Fig 2.
- Follow the procedure when tightening. Refer to Fig 3.
- 8 Nm +90° additional turn
Heat Shield
Bolt
- 9 Nm
Bolt
- 9 Nm
Heat Shield
Bolt
- 9 Nm
Bolt
- 9 Nm
Connection
- For coolant hose
O-Ring
- Replace
- Coat with coolant
Cylinder Head Bolt
- Replace
- Follow the procedure when loosening. Refer to Fig 2.
- Follow the procedure when tightening. Refer to Fig 3.
O-Ring
- Replace
- Coat with coolant
Connection
- For coolant hose
Bolt
- 9 Nm
Mount
- For the engine cover
Engine Lifting Eye
Bolt
- Replace
- 8 Nm +90°
Partition Plate
Ball Pin
- For the engine cover
Engine Lifting Eye
Bolt
- Replace
- 8 Nm +90°
Alignment Pin

Loosening the cylinder head

Fig 2: Cylinder Head Loosening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows-.

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

Cylinder head tightening sequence

Fig 3: Cylinder Head Bolts Loosening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the cylinder head bolts in the sequence -1 to 10- as follows.

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

Cylinder Head, Checking for Distortion

Fig 4: 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 permissible distortion: 0.05 mm