Skoda Workshop Service and Repair Manuals

Installing (set the timing)   Note t  Adjusting work on the timing belt must only be performed on a cold engine, as the position of the pointer at the tensioning element is temperature dependent. t  If it is intended to replace the tensioning pulley, the engine support must be removed → Chapter. Conditions

l  Tensioning pulley locked with rig tool -T10265- and fixed with nut up to right stop.

l  Interlock crankshaft with crankshaft arrester -T10050-. l  The screws for the camshaft sprocket and the toothed belt gear on the high pressure pump are replaced and loosely tightened. It must still be possible to just turn the toothed belt gears, however they must not hang loose.   Note

If necessary, turn the hub of the camshaft using the counterholder -T10172- with bolts -T10172/4- until it can be locked. To do so tighten at least one fixing screw -1- by hand.

–  Lock the hub of the camshaft with the rig pin for injection pump -3359-. To do so, insert rig pin through the open elongated hole in the cylinder head bore. –  Loosen again the screws which were tightened by hand.

–  Lock the hub of the high pressure pump with the rig pin for injection pump -3359-. To do so, insert the rig pin into the hole of the timing belt gear from the outside.   Note

If necessary, use a screwdriver to turn the hub of the high pressure pump at the screw heads -1- until the hub can be locked with the rig pin.

–  Turn the camshaft sprocket -3- and the toothed belt sprocket on the high pressure pump -5- clockwise in their elongated holes as far as the stop. –  Fit the timing belt in the specified order. 1 -  Crankshaft - toothed belt sprocket 2 -  Tensioning pulley 3 -  Camshaft sprocket 4 -  Timing belt gear on the coolant pump 5 -  Toothed belt gear on the high pressure pump 6 -  Guide pulley

–  Loosen nut -1- for tensioning pulley and remove rig tool -T10265-.   Note

Pay attention to correct fitting of the tensioning pulley in the rear timing belt cover -arrow-.

–  Fit counterholder -T10172- with adapters -T10172/4- onto camshaft sprocket. –  Push the counterholder in -direction of arrow- and keep it pretensioned. –  First of all tighten the screws -1- for the camshaft sprocket and the screws -2- for the toothed belt gear on the high pressure pump in this position to 20 Nm.    The screws must be further turned according to the setting of the timing → Anchor.

–  Turn the eccentric of the tensioning pulley with the offset screwdriver -T10264- clockwise -arrow- until the pointer -2- is in the centre of the base plate in front of the gap. l  The nut -1- must not turn along. –  Hold tensioning pulley in this position and tighten nut.    Tightening torque: 20 Nm + torque a further 45° (1/8 turn) –  Remove locking pins -3359- and the crankshaft arrester -T10050-. Test timing: –  Turn the crankshaft at the screw for timing belt gear 2 turns in the direction of running of the engine until the crankshaft is positioned shortly before „TDC“.

–  Position again the crankshaft arrester -T10050- on the crankshaft timing belt sprocket. –  Turn the crankshaft in the direction of rotation of the engine until the bolt -arrow- of the crankshaft arrester engages during this rotary movement in the sealing flange.   Note

The removal of the crankshaft and camshaft is limited in the following test. The removal point of the hub of the high pressure pump is always difficult to find again. A slight difference -arrow- does not influence the engine running. Conditions

l  The hub of the camshaft must be locked with the rig pin for diesel injection pump -3359-.

l  The pointer of the tensioning pulley -2- must be in the area -a- of the base plate -1-. If the conditions are not fulfilled: –  Correct timing → Anchor. If the conditions are fulfilled: –  Continued if the timing is correctly set → Anchor. Correct timing: –  If the hub of the camshaft cannot be locked, pull back the crankshaft arrester -T10050- until the bolt drops out of the hole. –  Turn the crankshaft against the running direction of the engine slightly over the „TDC“. –  Now turn the crankshaft slowly in the running direction of the engine until the hub of the camshaft can be locked. –  After locking, loosen the screws for the camshaft sprocket.

If the bolt of the crankshaft arrester -T10050- is positioned to the left of the hole: –  Rotate the crankshaft in direction of rotation of engine until the bolt of the crankshaft arrester engages in the sealing flange. –  Tighten bolts of camshaft sprocket to 20 Nm.    The screws must be further turned according to the setting of the timing → Anchor. If the bolt of the crankshaft arrester -T10050- is positioned to the right behind the hole: –  First of all turn the crankshaft slightly against the direction of rotation of engine until the bolt is positioned to the left in front of the hole. –  Slowly turn the crankshaft in the direction of rotation of the engine until the bolt of the crankshaft arrester -T10050- engages into the hole in the sealing flange. –  Pre-tighten the fixing screws for the camshaft sprocket to 20 Nm.    The screws must be further turned according to the setting of the timing → Anchor. Continued if the timing is correctly set: –  Remove the locking pin -3359- and the crankshaft arrester -T10050-. –  Check the timing once again → Anchor. If the hub of the camshaft sprocket can now be secured: –  Tighten fixing screws of toothed belt sprockets with a rigid wrench as follows: t  Camshaft sprocket:

–  45° (torque a further 45° (1/8 turn). Counterhold with counterholder -T10172- with bolts -T10172/4-. t  Toothed belt sprocket on the high pressure pump:

–  90° (torque a further 45° (1/4 turn). Counterhold with counterholder -T10172- with bolts -T10172/9-. Further installation: Further installation occurs in reverse order to removal. t  Tightening torques: → Chapter.