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Home >> Audi >> 2014 >> S6 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1662 (2.5L - Cylinder Head & VALVETRAIN - Engine Code(S): CBTA & CBUA (Convertible)) >> 15 Cylinder Head, VALVETRAIN >> Description And Operation >> Valve Timing, Adjusting >> Notes

Valve Timing, Adjusting: Notes

WARNING: This page is about a different car, the 2014 Volkswagen Beetle and 2013 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required 

Modify Counterhold T10172

Fig 1: Identifying Bolts Attached To Adapter T10172/1 For Installation
GWWM15-0190Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the Adapter T10172/1 and install the M8 x 16 bolts -A-.

NOTE: The valve timing must be adjusted if the camshaft chain sprockets were loosened during repairs or if the valve timing is not set.

-- Follow repair instructions. Refer to GENERAL INFORMATION .

Securing Camshafts if Valve Timing is Correct 

-- Remove the timing chain cover. Refer to TIMING CHAIN COVER .

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

-- Lock the crankshaft in place to adjust the valve timing. Refer to CRANKSHAFT, LOCKING TO CHECK/ADJUST VALVE TIMING .

-- Attach the Camshaft Clamp T40070 to the camshafts as shown and tighten the bolts to 20 Nm.

Fig 2: Identifying Camshaft Clamp T40070 Installed On To Camshafts
GWWM15-0185Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If the bolts are difficult to install, position an 18 mm or 19 mm open-end wrench -A- at the opening on the exhaust camshaft and rotate the camshaft slightly in the -direction of the arrow- to remove any play in the chain drive.

-- Relieve the tension on the timing chain. To do this, insert an appropriate screwdriver between the piston of the chain tensioner and the tensioning rail and press in -direction of arrow-.

Fig 3: Identifying Chain Sprockets Placed Into Timing Chain
GWWM15-0177Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Secure the fully pushed-in piston with Locking Pin T03006. The locking pin must be inserted all the way.

Securing Camshafts if Valve Timing is Not Correct 

-- Remove the timing chain cover. Refer to TIMING CHAIN COVER .

-- Turn the crankshaft to cylinder 5 Top Dead Center (TDC) (refer to CRANKSHAFT, LOCKING TO CHECK/ADJUST VALVE TIMING ) but do not remove the crankshaft with Locking Pin T40069.

-- Turn the crankshaft so the Camshaft Locating Tool T40070 can be attached easily to the camshafts, as shown.

Fig 4: Identifying Camshaft Clamp T40070 Installed On To Camshafts
GWWM15-0185Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Tighten the bolts on the Camshaft Clamp T40070 to 20 Nm.

Remove Camshaft Chain Sprockets 

-- Release the tension on the timing chain. To do this, insert an appropriate screwdriver between the piston of the chain tensioner and the tensioning rail and press in -direction of arrow-.

Fig 5: Identifying Chain Sprockets Placed Into Timing Chain
GWWM15-0177Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Secure the fully pushed-in piston with Locking Pin T03006. The locking pin must be inserted all the way.

-- Remove the bolts -1 and 4- with Multipoint Socket T10035 and then remove the chain sprockets -2 and 3-.

If necessary, chain sprocket -3- must be pressed off lightly using a screwdriver.

NOTE: Secure the crankshaft (refer to CRANKSHAFT, LOCKING ) in case it is still not secured. Crankshaft must only be rotated slightly around TDC point for this. Otherwise there is a risk the valves rest on the pistons.