Skoda Workshop Service and Repair Manuals

Installing and tensioning   Note t  Adjusting work at the timing belt must only be carried out when engine is cold. t  When rotating the camshaft, the crankshaft must not be positioned at TDC for any one piston. Risk of damaging valves and pistons. l  Interlock camshaft with locking pin e. g. -3359- or -MP 1-301-. l  Interlock the crankshaft with the crankshaft arrester -T10050-. Engines for vehicles ? 10.01

–  Release the fixing bolts -1- of the camshaft timing gear until the camshaft timing gear can be rotated in the elongated holes. –  Turn the camshaft timing gear clockwise -arrow- up to the stop.

–  Now using the eccentric of the tensioning pulley with the two-hole nut turner -C- carefully turn in a clockwise direction until the peg of the eccentric element is positioned immediately before the stop -B-. –  Fit timing belt onto camshaft sprocket, tensioning pulley, crankshaft timing belt sprocket and, last of all, onto the timing belt sprocket of the coolant pump. –  Install the tensioning device for toothed belt.

–  Turn the eccentric of the tensioning pulley in an anti-clockwise direction with two-hole nut turner -C- (the lug on the eccentric moves toward the stop -A-) until it is possible to remove the small rig plate -T10008- without being under tension. –  Now relieve the counterforce on the tensioning device clockwise until dimension -a- is obtained (the peg of the eccentric element moves towards the stop -B- in the process):    Specified dimension -a-: 4 ± 1 mm   Note t  A Ø 4 mm twist drill can also be used for setting the gap -a-. t  Gap size -a- becomes smaller after the fixing nut for tensioning pulley is tightened. This fact should therefore be taken into account when setting with Ø 4 mm drill bit. t  On a warm engine dimension -a- can decrease to 1 mm. –  Hold the tensioning pulley in this position and tighten the fixing nut for the tensioning pulley to 20 Nm + torque a further + 45° (1/8 turn).

–  Tighten fixing bolts -1- of camshaft sprocket to 20 Nm + torque a further 45° (1/8 turn). –  Remove locking pin - MP 1-301- or -3359- and crankshaft arrester -T10050-. Test timing: –  Turn the crankshaft two turns in the direction of running of the engine until the crankshaft is positioned shortly before TDC for cylinder 1.   Note t  While undertaking this motion the stud of the crankshaft arrester -T10050- must again engage in the hole of the sealing flange. t  If the crankshaft has been turned beyond TDC for cylinder 1 and if the stud of the crankshaft arrester could not engage in the sealing flange, turn the crankshaft back through a 1/4 turn and again position the crankshaft in the running direction of the engine on TDC for cylinder 1. Corrections against the running direction of the engine to set the stud of the crankshaft arrester are not allowed. l  Specified dimension -a-: 4 ± 1 mm. –  Once you have set the stud of the crankshaft arrester -T10050-, check whether dimension -a- has been obtained and whether the hub of the camshaft can interlock with the locating pin - MP 1-301- or -3359-. If dimension -a- is not reached: –  Tighten the tensioning pulley.    Hold the tensioning pulley with the two-hole nut turner -C -, loosen the fixing nut and relieve the counterforce of the tensioning device until dimension -a- is obtained. –  Tighten fixing nut again to 20 Nm + torque a further 45° (1/8 turn). If the hub of the camshaft sprocket cannot be arrested: –  Pull the stud of the crankshaft arrester -T10050- out of the bore hole in the sealing flange and turn the crankshaft until the hub can be engaged by the locating pin -3359- or -MP 1-301-.

–  Loosen fixing bolts -1- of the camshaft timing gear.

–  Turn the crankshaft against the running direction of the engine until the stud of the crankshaft arrester -T10050- is positioned shortly before the sealing flange bore hole -arrow-. –  Now turn the crankshaft in the direction of running of the engine until the stud of the crankshaft arrester -T10050- engages in the bore hole in the sealing flange. –  Tighten fixing bolts of camshaft sprocket to 20 Nm + torque a further 45° (1/8 turn). –  Remove locking pin - MP 1-301- or -3359- and locking pin -T10050-. –  Turn the crankshaft 2 turns in the direction of running of the engine until the crankshaft is positioned again on TDC for cylinder 1. –  Repeat check. Engines for vehicles 11.01 ? l  Interlock tensioning pulley in released position with fixing nut.

–  Check the correct fitting of the tensioning pulley in the hole in the rear timing belt guard -arrow-.

–  Slightly screw in screws -arrows-. l  It must still be possible to turn the camshaft sprocket on the hub, however it must not hang loose. –  Turn camshaft sprocket clockwise in the elongated holes as far as the stop. –  Fit toothed belt onto crankshaft toothed belt sprocket, tensioning pulley, camshaft and, last of all, onto the toothed belt sprocket of the coolant pump. –  Install guide pulley of toothed belt → Item.

–  Loosen the fixing nut -1- of the tensioning pulley. –  Turn the eccentric of the tensioning pulley with two-hole nut turner (e. g. -T10020-) clockwise in such a way until the pointer -2- stands in the centre of the base plate in the gap.   Note Ensure that the fixing nut does not turn.

–  Firmly hold the eccentric of the tensioning pulley in this position and tighten fixing nut to 20 Nm + torque a further 45° (1/8 turn).   Note When tightening the fixing nut, the pointer turns -arrow- max. 5 mm to the right from the gap of the base plate. This position must not be corrected, because the toothed belt settles when running-in. –  Tighten bolts of camshaft sprocket to 20 Nm + torque a further 45° (1/8 turn). –  Remove locking pin - 3359- or -MP 1-301- and crankshaft arrester -T10050-. Test timing: –  Turn the crankshaft two turns in the direction of running of the engine until the crankshaft is positioned shortly before TDC for cylinder 1.

–  Interlock during this motion the hub in the direction of running of the engine with locking pin -3359- or -MP 1-301-.

–  Check whether: t  the crankshaft can be interlocked with the crankshaft arrester -T10050 -; t  Pointer of tensioning pulley stands in the centre or max. 5 mm to the right from the gap of the base plate. If the crankshaft cannot be arrested:

–  Loosen bolts -arrows- of the camshaft timing gear.

–  Rotate crankshaft in direction of rotation of engine until the crankshaft can be arrested with the crankshaft arrester -T10050-.   Note If the crankshaft can be turned via the TDC for cylinder 1, turn crankshaft back slightly and once again set to the TDC for cylinder 1 by turning in direction of rotation of engine.

–  Tighten bolts -arrows- of camshaft sprocket to 20 Nm + torque a further 45° (1/8 turn). –  Remove locking pin -3359- or -MP 1-301- and crankshaft arrester - T10050-. –  Turn the crankshaft 2 turns in the direction of running of the engine until the crankshaft is positioned again on TDC for cylinder 1. –  Repeat timing test. Continued for installing in all vehicles Further installation occurs in reverse order to removal. Tightening torques of the engine mounting and pendulum support → Chapter.