Cylinder Head, Tightening Sequence

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Fig 1: Cylinder Head Bolts Tightening Sequence

GWWA15-0712

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Replace the bolts that were tightened with an additional turn.

-- Tighten the bolts in four steps in the sequence shown.

Step	Bolts	Tightening specification/additional turn
1.	-1 to 8-	Install all the way in by hand.
2.	-1 to 8-	40 Nm
3.	-1 to 8-	Tighten an additional 90°
4.	-1 to 8-	Tighten an additional 90°

Fig 2: Checking Cylinder Head Distortion

GWWA15-10931

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 permitted distortion: 0.05 mm.

Fig 3: Cylinder Head Refacing Dimension

GWWA15-0169

Courtesy of AUDI OF AMERICA, LLC

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

Minimum dimension -a- = 139.20 mm.

Fig 4: Identifying Oil Dipstick Guide Tube Bolt

GWWA17-10255

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolt -arrow- to 9 Nm.