Volkswagen Workshop Service and Repair Manuals > Polo Mk5 > Power unit | 3-cylinder injection engine (4-valve) | Engine cylinder head, valve gear | Cylinder head | Removing and installing camshaft housing

Installing camshaft housing

Caution

The studs (M6x80) must be screwed into cylinder head before installing camshaft housing.

The camshaft housing is guided by the studs, so that the roller rocker fingers do not slip off the supporting elements.

Prerequisite

l	The pistons must not be positioned at TDC.

Note

If a piston is at TDC, the valves could strike the piston when the camshafts turn.

–	Remove sealant residue from cylinder head and camshaft housing with commercially available sealant remover.

–	Also prevent dirt and residual sealant from entering cylinder head.

–	Clean sealing surfaces. They must be free of oil and grease.

–	Apply thin, even coat of sealant on clean camshaft housing sealing surface. See hatched area in illustration.

Note

Sealant must not be applied too thickly; otherwise excess sealant can enter oil channels and cause damage to engine.

–	Ensure that all roller rocker fingers contact valve stem ends -1- correctly and that they are clipped into their respective support elements -2-.

–	Before installing camshaft housing, screw two studs (M6 x 80) into cylinder head.

–	Carefully fit camshaft housing vertically from above onto studs -arrows- and cylinder head dowel pins.

–	Evenly tighten new camshaft housing securing bolts from inside to outside alternately and diagonally.

Ensure that camshaft housing is not canted. Specified torque: 10 Nm + turn 90° further.

Note

After installing the camshaft housing, wait about 30 minutes for the sealant to dry.

Further assembly is basically the reverse of the dismantling sequence.

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