Camshaft Timing Chain: Notes

WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Camshaft Bar T10068 A
Sealant.

Removing the camshaft timing chain

Engine installed.

-- Drain coolant. Refer to COOLING SYSTEM, DRAINING AND FILLING .

-- Remove intake manifold. Refer to Removal and Installation .

-- Remove coolant thermostat housing. Refer to COOLANT THERMOSTAT HOUSING .

Vehicles with engine code BUB:

-- Remove the hose -2- from the secondary air injection (AIR) combination valve.

Fig 1: Identifying Secondary Air Injection (Air) Combination Valve Component Location

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NOTE:

Ignore -1-.

Vehicles with engine code CBRA:

-- Disconnect the hose -1- and the vacuum hose -2- from the left Secondary Air Injection (AIR) combination valve.

Fig 2: Identifying Hose -1- And Vacuum Hose -2- From Left AIR Combination Valve

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NOTE:

Ignore -3- and -arrows-.

All Vehicles

-- Mark and disconnect electrical connectors:

Fig 3: Marking And Removing Connectors

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Camshaft Adjustment Valve 1 (exhaust) -N318-
Camshaft Adjustment Valve 1 -N205-
Camshaft position sensor -G40-
Camshaft position (CMP) sensor 2 -G163-

-- Remove Ground (GND) wire -5-.

-- Disconnect coolant hose -6-.

-- Remove electrical wiring bracket -arrows-.

-- Place bracket with electrical wiring toward front.

-- Remove cylinder head cover. Refer to CYLINDER HEAD COVER .

-- Adjust crankshaft at vibration damper bolt in direction of engine rotation to "TDC" marking -arrow-.

Fig 4: Identifying Crankshaft At Vibration Damper Securing Bolt In Engine At TDC Cyl. 1

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-- Cams -A- of cylinder 1 must face each other.

Fig 5: Camshaft Lobes For Cylinder Facing Each Other

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-- At the same time, T10068 A must engage in both shaft grooves. Turn crankshaft 1 additional turn if necessary.

Fig 6: Identifying Camshaft Bar T10068 A Engage In Shaft Grooves

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-- Remove camshaft timing chain tensioner -arrow-.

Fig 7: Camshaft Timing Chain Tensioner

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-- Remove the bolts -1, 2 and 3-.

Fig 8: Identifying Cylinder Head Cover Bolts

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CAUTION:

The cylinder head seal could be damaged.

Remove upper timing chain cover horizontally from cylinder head.

-- Remove bolts -arrows- and remove guide rail -1-.

Fig 9: Locating Guide Rail & Bolts

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-- Remove T10068 A.

T10068 A must not be inserted when loosening or tightening camshaft adjuster bolts.

-- Remove intake side camshaft adjuster bolt by counter-holding on camshaft hex head with open-end spanner.

Fig 10: Identifying Tools To Loosen Intake Camshaft Adjuster Bolt

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-- Remove intake-side camshaft adjuster.

-- Remove exhaust side camshaft adjuster bolt by counter-holding on camshaft hex head with open-end spanner.

Fig 11: Identifying Tools To Loosen Exhaust Camshaft Adjuster Bolt

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-- Remove exhaust-side camshaft adjuster.

-- Place camshaft timing chain over camshaft adjustment valves.