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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 >> Adjusting Timing

Adjusting Timing

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.

-- Place the chain sprockets -2 and 3- in the timing chain as shown and then mount them on the camshafts. Install the new bolts -1 and 4- hand-tight.

Fig 1: Identifying Chain Sprockets Placed Into Timing Chain
GWWM15-0177Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Chain gears must still be able to be rotated, however they must not tilt.

NOTE: Make sure that timing chain lies correctly in gliding and tensioning tracks.

-- Push the piston in and pull the Locking Pin T03006 out to release the tension on the chain tensioner.

-- Mount the Counterhold - Kit - Multiple Use T10172 on the exhaust camshaft chain sprocket -4-.

Fig 2: Attaching Modified Counterhold Tool T10172 On To Chain Sprocket For Exhaust Camshaft
GWWM15-0171Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
NOTE: A second technician will be needed for the rest of the procedure.

-- Push the Counterhold - Kit - Multiple Use T10172 in -direction of arrow- to pretension the timing chain.

-- Tighten the intake camshaft bolt -2- first and then the exhaust camshaft bolt -3- to 60 Nm.

Then tighten bolts -2 and 3- 90° (1 /4 rotation) further.

NOTE: When applying the additional torque of 90°, timing chain must no longer be held at pre-load.

-- Remove the Camshaft Clamp T40070.

Fig 3: Identifying Camshaft Clamp T40070 Installed On To Camshafts
GWWM15-0185Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the Crankshaft Locking Pin T40069 for securing the crankshaft.

Fig 4: Identifying Crankshaft Must Not Be Rotated Out Over TDC Marking
GWWM15-0176Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Turn the crankshaft 2 turns in direction of engine rotation and lock it into place. Refer to CRANKSHAFT, LOCKING TO CHECK/ADJUST VALVE TIMING . The crankshaft is locked to check/adjust the valve timing.

-- Checking valve timing. Refer to VALVE TIMING, CHECKING .

If valve timing is not correct:

-- Loosen the camshaft chain sprocket again and adjust the valve timing again (replace the camshaft bolts).

The rest of the installation follows the reverse of the removal procedures. Note the following:

-- Remove the Crankshaft Locking Pin T40069 from the back of the cylinder block and install the bolt.

-- Fill the coolant. Refer to COOLANT, DRAINING AND FILLING .