SEAT Workshop Service and Repair Manuals

Installing   Note! t  When installing the camshafts the cams for No. 1 Cyl. must point upwards. t  When installing the bearing caps, ensure that the cap markings can be read from the inlet side of the cylinder head. t  When reusing an old drive chain, ensure the drive chain is positioned on both chain sprockets as per the coloured markings.

–  Renew bonded rubber seal for chain tensioner and lightly coat hatched area with sealant -D 454 300 A2-. –  Place the drive chain on the camshaft chain sprocket as follows:

t  When using a new chain the distance between the notches -A- and -B- on the camshafts must be 16 rollers of the drive chain. The illustration shows where the 1st and 16th rollers must lie on chain sprockets. t  The notch -A- is is offset slightly inwards towards chain roller -1- –  Slide chain tensioner between drive chain. –  Oil running surfaces of both camshafts. –  Place camshafts with drive chain and chain tensioner in cylinder head. –  Tighten chain tensioner to 10 Nm (take note of dowel sleeves).

–  Tighten inlet and exhaust camshaft -2nd- and -4th- bearing caps using alternate and cross-over sequence to 10 Nm (take note of dowel sleeves).

–  Install both bearing caps at chain sprockets for inlet and exhaust camshafts. Check camshafts are positioned correctly and tighten bearing cap to 10 Nm (remember dowel sleeves). –  Remove retainer for chain tensioner -T20044-.

–  Coat hatched area of double bearing cap lightly with sealant -D 454 300 A2-, install and tighten to 10 Nm (remember dowel sleeves). –  Install remaining bearing caps and tighten to 10 Nm (remember dowel sleeves).

–  Install camshaft sprocket. t  Note installation position: The smaller shoulder of the camshaft sprocket faces outwards -arrows- and the TDC marking for No. 1 cylinder is visible from the front. The rest of the assembly is basically a reverse of the dismantling sequence.

–  Check position of camshafts to one another. When installing toothed belt and adjusting timing → Chapter   Note! After installing the camshaft, the engine must not be started for approx. 30 minutes. Hydraulic compensation elements must settle (otherwise the valves can strike the piston).