volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Checking valve guides > < Removing

Golf Mk4

Installing
Installing
l  Sealing surfaces must be free of oil and grease.
l  When retaining frame or camshaft is installed, No. 1 cylinder cams must point upwards.
l  The pistons must not be positioned at TDC.
Procedure
–  Install supporting elements in cylinder head and fit respective roller rocker finger onto respective valve stem end or supporting element.
   
–  Ensure that all roller rocker fingers contact valve stem ends -1- correctly and that they are clipped into their respective support elements -2-.
–  Oil camshaft running surfaces.
–  Carefully place camshaft in its bearings in the cylinder head.
  N15-0451
–  Apply an even, slightly raised sealant bead (sealant -D 188 800 A1-) in clean groove of retaining frame -arrow-. Spread sealant -D 188 800 A1- evenly over sealing surface.
  Note
t  Sealant -D 188 800 A1- must not be applied too thickly. If necessary wipe away excess sealant with a lint-free cloth.
t  The retaining frame should be positioned and bolted on without interruption because the sealant begins to harden immediately when the sealing surfaces come into contact with each other.
t  Observe expiry date of sealing compound.
–  Insert rear sealing cover flush.
–  Put retaining frame in position and lightly tighten nuts for bearings 2 and 4 diagonally and alternately. Then likewise lightly tighten nuts of bearings 3, 1 and 5.
  N15-0450
–  Finally tighten nuts in order shown to 20 Nm.
–  Install cylinder head cover. Tighten bolts from inside outwards, alternately and diagonally.
–  Install rear part of toothed belt guard.
  N13-10144
–  Position seal using assembly tool -T10071/1- and press in to stop using fitting sleeve -3265- and bolt -T10071/2-.
  Note
Put a large, commercially available washer M12 under bolt to avoid wear to fitting sleeve.
–  Insert feather key in camshaft.
  N15-0641
–  Install camshaft toothed belt pulley. When tightening camshaft toothed belt pulley bolt, hold with counterhold -3415-. Specified torque: 100 Nm
  Note
When camshaft is turned, crankshaft must not be at TDC. Danger of damage to valves and piston crowns.
Further assembly is basically the reverse of the dismantling sequence.
Installing toothed belt and adjusting valve timing → Chapter.
  Note
Let sealing compound -D 188 800 A1- dry for approx. 30 minutes after installing retaining frame and cylinder head cover.
  N15-0455

Checking valve guides > < Removing