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 → Fig..

–  Successively release screws -arrows- for camshaft sprocket, replace screws and do not fully screw in the new screws. Conditions Tensioning pulley A

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

l  The tensioning pulley is loose and the nut -1- is tightened to 2 up to 4 Nm. Proceed as follows for both tensioning pulleys

l  Lock the crankshaft with the crankshaft arrester -T10050-. l  The screws for the camshaft sprocket are replaced and loosely tightened. It must still be possible to just turn the toothed belt sprocket, however it must not hang loose.   Note

If necessary, turn the hub of the camshaft using the counterholder -T10172- with adapters -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 -arrows-.

–  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 toothed belt in the following 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 Tensioning pulley A

–  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-.

–  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 -1-.    Tightening torque: 20 Nm + torque a further 45° (1/8 turn) Tensioning pulley B

–  Carefully turn the eccentric -2- of the tensioning pulley with the offset screwdriver -T10409- anti-clockwise and position the pointer -4- in the centre of the base plate in the gap -3-. Ensure that the fixing nut -1- does not turn along.

The markings -arrow- on the eccentric element and the tensioning pulley are nearly aligned. –  Hold tensioning pulley in this position and tighten nut -1-.    Tightening torque: 20 Nm + torque a further 45° (1/8 turn) Proceed as follows for both tensioning pulleys

–  Fit counterholder -T10172- with bolts -T10172/4- onto camshaft sprocket and press in -direction of arrow-. –  Keep it pretensioned and pre-tighten the screws -1- for the camshaft sprocket to 20 Nm.   Note The screws for the camshaft sprocket must be further turned after the setting and testing of the timing have been carried out → Anchor. –  Tighten the screws -2- for the toothed belt sprocket on the high pressure pump. For this purpose, counterhold the toothed belt sprocket using the counterholder -T10172- with bolts -T10172/9-.    Tightening torque: 20 Nm –  Remove rig pins for diesel injection pump -3359- and crankshaft arrester -T10050-. Test timing –  Turn the crankshaft at the central screw for timing belt gear 2 turns in the direction of running of the engine until the crankshaft is positioned shortly before „TDC“.

–  Position the crankshaft arrester -T10050- on the toothed belt sprocket of the crankshaft. –  Turn the crankshaft in the direction of rotation of the engine until the bolt -arrow- of the crankshaft arrester engages during this rotary movement into the hole 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 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 –  Push the crankshaft arrester -T10050- until its locking bolt pushes out of the hole in the sealing flange. –  Turn the crankshaft against the running direction of the engine slightly before „TDC“. –  Now slowly turn the crankshaft in the running direction of the engine, until the hub of the camshaft can be locked during this rotary movement with the rig pin for the injection pump -3359-. –  Slacken the fixing screws for the camshaft sprocket on the locked hub of the camshaft sprocket.

–  Check the position of the bolt of the crankshaft arrester -T10050- to the hole in the sealing flange: If the bolt of the crankshaft arrester -T10050- is positioned to the left 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. –  First tighten the fixing screws for the camshaft sprocket to 20 Nm.   Note 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. –  First tighten the fixing screws for the camshaft sprocket to 20 Nm.   Note 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 removed:

–  Torque the fixing screws of the camshaft sprocket a further 45° (1/8 turn) using a rigid wrench. Counterhold with counterholder -T10172- with bolts -T10172/4-. Further installation occurs in reverse order to removal.    Tightening torques: → Chapter