Exploded view - cylinder head (1.8 ltr. engine) — AUDI

🧭 Before you start

Slacken the head bolts in sequence, remove the head and check it for distortion with a straight edge and feeler gauge. On fitting, tighten the head bolts in sequence to 40 Nm, then 90° and a further 90°. Pre-tighten the smaller bolts to 8 Nm and turn them 90° further, and tighten the crankcase breather bolts in sequence to 11 Nm.

Fits: Audi A5 Cabriolet (8F), Audi A5 (8T, 2007–2016), Audi A4 B8 (8K, 2007–2015)

• Special tools named: torque wrench, feeler gauge

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• Follow the numbered sequence for both slackening and tightening the head bolts.
• Head bolts: 40 Nm, then 90°, then another 90° with a rigid wrench.
• Smaller bolts: 8 Nm then 90° further.
• Crankcase breather bolts go to 11 Nm in their sequence.
• Measure the head for distortion at several points before refitting it.
• Angle-tightened head bolts are normally renewed, as general practice.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📐 37 workshop diagrams for CABA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Tighten bolts for crankcase breather system in the sequence (1 ... 10) to 11 Nm. — 11 Nm (8.1 lb-ft)
2. Remove bolts (arrows).
3. Slacken cylinder head bolts in the sequence (1 ... 5).
4. Tighten cylinder head bolts in the sequence (1 ... 5) as follows:
5. Tighten with torque wrench initially to 40 Nm. — 40 Nm (30 lb-ft)

6. Use rigid wrench to turn 90° further.
7. Use rigid wrench to turn 90° further.
8. Pre-tighten bolts (arrows) to 8 Nm. — 8 Nm (5.9 lb-ft)
9. Turn bolts (arrows) 90° further using a rigid wrench.
10. Use straight edge and feeler gauge to measure cylinder head for distortion at several points.

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