Removing and installing housing for variable valve timing — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Special tools named: 32 mm open-end spanner

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• To loosen securing bolt for camshaft adjuster, counterhold on hexagon flats (arrow) of camshaft using a 32 mm open-end spanner.
• Make sure that the piston rings on camshafts do not become damaged when installing housing for variable valve timing.The ends of the piston rings must be offset by 120°.

🔧 Engine codes this applies to

📋 Procedure

1. Remove camshaft timing chains .
2. To loosen securing bolt for camshaft adjuster, counterhold on hexagon flats (arrow) of camshaft using a 32 mm open-end spanner.
3. Remove camshaft adjuster.
4. Unscrew bolts (arrows) and remove housing for variable valve timing.
5. Clean the strainers (arrows) on reverse side of housing for variable valve timing.

6. Thinly coat contact surfaces for piston rings in housing for variable valve timing. [Note: Make sure that the piston rings on camshafts do not become damaged when installing housing for variable valve timing.The ends of the piston rings must be offset by 120°.]
7. Attach housing for variable valve timing onto camshafts.
8. Tighten bolts (arrows) in diagonal sequence.
9. Install camshaft adjusters .
10. Install the camshaft timing chains .

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