Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ V.A.G 1331 Torque wrench (5...50 Nm)

Removing

• ‒ Remove upper toothed belt guard and cylinder head cover.
• ‒ → Turn crankshaft to TDC No. 1 cylinder.
       A: Engine codes 1Y, AAZ, AEY
       B: Engine codes 1Z, AHU, AFN, AFN, AVG,
       ALE
• ‒ Loosen tensioner.

Engines with semi-automatic tensioning roller:

• ‒ Remove relay roller.

• ‒ Take off toothed belt.

• ‒ → Lock camshaft with setting bar.
• ‒ Loosen camshaft sprocket securing bolt 1/2 turn. Release camshaft sprocket from camshaft taper by tapping with a hammer (using a drift through rear toothed belt guard opening).
• ‒ Take off camshaft sprocket.
• ‒ First remove bearing caps 5, 1 and 3. Then loosen bearing caps 2 and 4 alternately and diagonally.

Installing

Notes:

• ◆ When installing the camshaft No. 1 cylinder cams must point upwards.
• ◆ → When installing the bearing cap note offset, before installing camshaft fit bearing caps and determine fitting position.

• ‒ Oil camshaft running surfaces.
• ‒ Tighten bearing caps 2 and 4 alternately and
  diagonally to
       20 Nm.
• ‒ Install bearing caps 5, 1 and 3 and also tighten to
       20 Nm.
• ‒ Locate bearing cap 5 by tapping lightly on the end of the camshaft.
• ‒ Install camshaft sprocket.
• ‒ Install and tension toothed belt .

Note:

When new tappets have been installed the engine must not be started for about 30 minutes. Hydraulic compensation elements must settle (otherwise valves will strike pistons).