Valve Timing, Checking

Valve Timing, Checking

Special tools, testers and auxiliary items required

• Torque Wrench (5-50 Nm) (V.A.G 1331)

• Crankshaft Adapter (T03003)

• Locking Pin (T40069)

• Camshaft Clamp (T40070)

Procedure

- Remove the cylinder head cover. Refer to => [ Cylinder Head Cover ] Service and Repair.

- Remove the noise insulation.

- Remove the front section of the right wheel housing liner..

- Install the crankshaft adapter (T03003) onto the vibration damper bolts.






The crankshaft adapter (T03003) can only be installed correctly in one position.

- Rotate the crankshaft in engine rotation direction until the arrow - A - on the crankshaft adapter (T03003) faces downward vertically in comparison to the engine axis. This position corresponds approximately to the crankshaft Top Dead Center (TDC) position.

• If the threaded holes in the camshafts - arrows - do not point upward, the crankshaft must be rotated one rotation (360°) in engine rotation direction.






- Remove the locking bolt - 1 - from the rear of the cylinder block.






- Look the through threaded hole and check whether the bore - 2 - in the crankshaft aligns with the threaded hole.

Use a mirror to do so.

- If he hole and bore align, install the locking pin (T40069) completely into the threaded hole and tighten it to 10 Nm.

If the crankshaft was rotated out past the TDC mark:

- Rotate the crankshaft back 45° in the opposite direction of engine rotation.

- Then, rotate the crankshaft again into the TDC position in engine rotation direction.

When the crankshaft is positioned slightly in front of the TDC position (the bore in the crankshaft is 90% visible), the locking pin (T40069) can be installed, although slightly more difficult.

• With the engine removed, the TDC mark can also be seen on the vibration damper and belt pulley side sealing flange. The notches - A and B - must align.






- Check whether the crankshaft can be rotated.

The valve timing is correct when the camshaft clamp (T40070) bolts can be installed easily into the ends of the camshafts as shown. The support surfaces of the camshaft clamp (T40070) must lie flat on the flats of the camshafts when doing this.






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

If the bolts for the camshaft clamp (T40070) can now be installed easily with the chain tensioned in this manner, the valve timing is also correct. Possibly the crankshaft was not secured correctly.

If the camshaft clamp (T40070) cannot be installed

The valve timing is incorrect when the camshaft clamp (T40070) bolts cannot be installed easily into the ends of the camshafts despite the tensioned chain.

• In this case, the valve timing must be adjusted. Refer to => [ Valve Timing, Adjusting ] Valve Timing, Adjusting.

After disassembly and assembly work

- Remove the locking pin (T40069) and install the locking bolt - 1 - to the rear of the cylinder block.






The rest of the installation follows the reverse of the removal procedure.

Tightening Specifications