Removing and installing cylinder head - all engine codes except CUKB, CXUA — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform code 85

• Opens: coolant
• Timing position: the crankshaft or camshaft is set and locked during this job
• Renewed: self-locking nuts

Don't miss

• Disregard (item 1).
• Cylinder head bolts do not have to be torqued down again later after repair work.

🔧 Engine codes this applies to

📐 45 workshop diagrams for CJZA

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

📋 Procedure

1. Remove camshaft housing .
2. Remove intake manifold .
3. Unplug electrical connectors:
4. Unscrew bolt (2) and remove screw-type clip.
5. Remove bolt (1) and nuts (arrows) and tie up catalytic converter.

6. Remove bolts (arrows) and detach heat shield for drive shaft (right-side).
7. Detach heat shield sleeve.
8. Unplug electrical connector (arrow) on oil pressure switch F22.
9. Unscrew bolts (arrows) and detach oil supply pipe (1) and oil return pipe (2).
10. Unplug electrical connectors:
11. Unplug electrical connector (2) at charge pressure control solenoid valve N75. [Note: Disregard (item 1).]
12. Remove bolt (1) on engine support.
13. Slacken cylinder head bolts in the sequence (1 ... 10) and remove.
14. Take off cylinder head and set it down on a soft surface (foam plastic). [Note: Renew bolts tightened with specified tightening angle.Renew self-locking nuts, as well as seals, gaskets and O-rings.When installing an exchange cylinder head, the contact surfaces between the hydraulic compensation elements, roller rocker fingers and cams must be oiled before installing the camshaft housing.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.After fitting a new cylinder head or cylinder head gasket, change the engine oil and the coolant in the entire cooling system.]
15. ⚠ Risk of damage to sealing surfaces.Carefully remove sealant residue from cylinder head and cylinder block.Ensure that no long scores or scratches are made on the surfaces.Risk of damage to cylinder block.No oil or coolant must be allowed to remain in the blind holes for the cylinder head bolts in the cylinder block.Ensure that cylinder head gasket seals properly:Carefully remove any remaining emery and abrasive material.Do not remove new cylinder head gasket from packaging until it is ready to be fitted.Handle the cylinder head gasket very carefully to prevent damage to the silicone coating or the indented area of the gasket. — Fit cylinder head gasket (1).
16. If crankshaft has been rotated: set No. 1 cylinder piston to top dead centre and then turn crankshaft back slightly.
17. Fit cylinder head.
18. Insert and hand-tighten cylinder head bolts.
19. Tighten cylinder head bolts . [Note: Cylinder head bolts do not have to be torqued down again later after repair work.]
20. Install intake manifold .
21. Install camshaft housing .
22. Change engine oil 821.
23. Fill cooling system with fresh coolant .

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