Removing and installing cylinder head (with engine installed) — AUDI
Removing and installing cylinder head (with engine installed) on Audi: factory workshop procedure for engines AAH, ABC.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
ABC
Removal is described for the left-hand cylinder head.
Removing
Remove ribbed belt =>Page
13-10
Remove toothed belt =>Page
13-12
Unbolt exhaust tube from manifold.
Drain off coolant at drain plug -arrow- with special tool 3247 and at lower drain plug of radiator.
Remove air duct hose between air mass meter and intake tube.
Remove all spark plug connectors.
Remove all electric connectors from injection valves.
Unbolt crank housing vent from left and right of cylinder head cover.
Unbolt fuel feed and return line.
Unclip cover from intake silencer.
Unbolt both bolts from underneath cover.
Press silencer towards rear and lift upwards.
Pull off vacuum pipe from left of silencer.
Remove silencer.
Unbolt left-hand cover for injection valve lines.
Disengage clutch cable and release.
Unbolt line from ACF valve to throttle valve unit from throttle flap unit.
Pull off connector from idling stabilising valve and from throttle flap potentiometer.
Pull off vacuum line from GRA bush.
Pull off connector from oil pressure sender and switch.
Pull connector off Hall sender.
Pull off vacuum line from valve for inlet manifold change-over (blue) as well as from AGR valve (brown).
Detach connector for lambda probe and heater from bulkhead and set aside.
Unbolt vacuum line to cycle valve for ACF at throttle valve unit.
Unbolt AGR valve.
Unbolt bracket of hydraulic line and earth wire to inlet hose.
Unbolt intake pipe and remove
Close opening with clean cloth.
Unbolt coolant pipe at the rear of the cylinder head.
Note!!:
After loosening the fixing bolts all cylinder head bolts must be tightened to 90°(1/4 turn)!!
Remove lambda probe.
Remove heat shield at exhaust manifold.
Remove bolts from cylinder head cover.
Unbolt rear toothed belt guard.
Unbolt line from hydraulic container to hydraulic pump.
Unscrew cylinder head.
Installing:
Clean sealing surfaces.
Cylinder head gasket:
Marking must face cylinder head.
Attach cylinder head- observe centring pins in cylinder block.
Insert cylinder head bolts and tighten by hand.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
Ask about my car →Other AUDI procedures
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- Checking idling switch -F60
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.