Fastener Tightening Specifications

Lower Timing Chain Cover Tightening Sequence

Fig 1: Identifying Sealing Flange Bolts

Courtesy of AUDI OF AMERICA, LLC

-- Tighten bolts in 3 stages as follows:

-- Tighten bolts -1- to 5 Nm.

-- Tighten bolts -2- to 23 Nm.

-- Tighten bolts -1- to 9 Nm.

Cylinder Head Cover Tightening Sequence

Fig 2: Cylinder Head Cover Bolt Loosening Sequence

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-- Tighten bolts to 10 Nm in -1 to 17- sequence.

Cylinder Head Tightening Sequence

Fig 3: Cylinder Head Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten bolts in 4 stages in sequence -1 to 20- as follows:

-- Tighten bolts by hand.

-- Tighten bolts to 30 Nm.

-- Tighten bolts to 50 Nm.

-- Tighten an additional ¹ /₂ turn (180°).

Intake Camshaft -A- Tightening Sequence

Fig 4: Camshafts - Tightening Specifications And Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten nuts in 5 stages as follows:

1. Install bearing cap 5 and 9 nuts alternating and diagonally as far as stop.
2. Tighten bearing cap 5 and 9 nuts to 5 Nm + ¹ /₈ additional turn (45°).
3. Tighten bearing cap 1 and 13 nuts to 5 Nm + ¹ /₈ additional turn (45°).
4. Tighten bearing cap 7 nuts to 5 Nm + ¹ /₈ additional turn (45°).
5. Tighten bearing cap 3 and 11 nuts to 5 Nm + ¹ /₈ additional turn (45°).

Exhaust Camshaft -B- Tightening Sequence

-- Tighten nuts in 5 stages as follows:

1. Install bearing cap 6 and 10 nuts alternately and diagonally as far as stop.
2. Tighten bearing cap 6 and 10 nuts to 5 Nm + ¹ /₈ additional turn (45°).
3. Tighten bearing cap 2 and 14 nuts to 5 Nm + ¹ /₈ additional turn (45°).
4. Tighten bearing cap 8 nuts to 5 Nm + ¹ /₈ additional turn (45°).
5. Tighten bearing cap 4 and 12 nuts to 5 Nm + ¹ /₈ additional turn (45°).