Skoda Workshop Service and Repair Manuals

Removing and installing timing chain and drive chain for oil pump Special tools and workshop equipment required t  Counterholder -T30004 (3415)- t  Extractor -T10094A- t  Adapter for dial gauge -T10170- or -T10170 A- t  Camshaft fixer/locator -T10171 A- Change camshaft fixer/locator -T10171- in camshaft fixer/locator -T10171 A- → Chapter. t  Counterholder -T10172- t  Rig pin -T40011- t  Dial gauge, commercially available Removing –  Remove engine cover → Chapter.

–  Release screws -2- and remove retaining clip -1-. –  Disconnect plug -3- from charge pressure sender -G31- with intake air temperature sender 2 -G299-. –  Unhook the hoses at the pressure pipe and open the cable guide. –  Press the retaining clips -arrows- towards the outside and pull the pressure pipe out towards the top. –  Then pull off the pressure pipe from the exhaust turbocharger.

–  Disconnect plug -arrow- at oil pressure switch -F1-.

–  Release screw -1- for earth lead.

–  Release screws -1- and -2- and push the left coolant pipes to the left side.

–  Release screws -arrows-, take off cap -1- and -2-. –  Remove ignition coil from cylinder 1 → Chapter and release the spark plug.

–  Screw adapter for dial gauge -T10170 - up to the stop into the spark plug thread. –  Insert the dial gauge -A- with extension -T10170/1- up to the stop and fix in place using the clamping screw -arrow-. –  Rotate the crankshaft in direction of rotation of engine on TDC for cylinder 1. Note down the position of the small pointer of the dial gauge.

The holes -arrows- in the camshafts must be positioned as shown. If necessary rotate the crankshaft a further revolution (360°).   Note t  If the crankshaft was turned more than 0.01 mm past the top dead centre, the crankshaft must once again be turned approx 45° in the opposite direction of rotation of the engine. Then position the crankshaft in direction of rotation of engine on top dead centre of cylinder 1. t  Permissible deviation from TDC of cylinder 1: ± 0.01 mm.

–  Insert camshaft fixer/locator -T10171 A - up to the stop into the holes in the camshaft housing. l  The locking bolts -arrows 1- must engage in the holes -arrows 2-. The inscription “TOP”-arrow 3- must be legible from above.

–  To secure the camshaft fixer/locator -T10171 A- screw in a M6 screw into the corresponding hole -arrows- by hand; do not tighten.   Note Pay attention that there are different fixing points for the camshaft fixer/locator -T10171 A-. –  Remove timing case → Chapter.

–  Pull off cover -1- from chain sprocket of oil pump.

–  Press the tensioning rail -1- by hand in -direction of arrow- and interlock the piston of the chain tensioner -2- with the rig pin -T40011-. –  Remove chain tensioner -2-.

–  Mark with a suitable felt-tip pen the direction of rotation of the timing chain -3-.   Note The fixing screw of the camshaft adjuster -2- has a left-hand thread. –  Release screws -2- and -4- and remove the camshaft adjuster -1- with the timing chain -3-. Use counterholder -T10172- to counterhold.

–  Hold the chain sprocket of the oil pump with the counterholder -T10172- and slacken the fixing screw -1-.

–  Lever out tensioning spring -1- at the screw -2- with a screwdriver and remove tensioning spring -1-. –  Unscrew fixing screw -3- and remove the chain tensioner.

–  Mark with a suitable felt-tip pen the direction of rotation of the drive chain for oil pump -2-. –  Release the fixing screw of the chain sprocket -1- and remove the chain sprockets -1- and -3- together with the drive chain of the oil pump -2-. Install l  The crankshaft must be positioned on top dead centre of cylinder 1.

–  Push chain sprocket -1- in -direction of arrow- up to the stop onto the crankshaft journal.   Caution The integrated peg -2- of the chain sprocket -1- must fit into the slot -3- at the crankshaft stub.

–  Mark the positions of the chain sprocket and the crankshaft to the cylinder block with a felt-tip pen.

–  Fit the drive chain of the oil pump -3- onto the chain sprocket -1-. –  Place the chain sprocket of the oil pump -2- into the drive chain of the oil pump -3- and mount it onto the drive shaft of the oil pump.   Note t  Observe the marking of the running direction on the drive chain for oil pump. t  The drive wheel of the oil pump only adapts to one postion on the drive shaft of the oil pump -arrow-.

–  Hold the chain sprocket of the oil pump with the counterholder -T10172-. –  Torque fixing screw -1- to 20 Nm + a further 45° 1/4 turn (90°).

–  Position the chain sprocket onto the drive chain of the oil pump and tighten the fixing screw -3- to 15 Nm. –  Lever the tensioning spring -1- onto the screw -2- with a screwdriver.   Note t  Observe markings -arrows-. t  The crankshaft should not turn.

–  Screw on the chain sprocket -3- by hand with a new fixing screw. –  Place the timing chain -1- onto the chain sprocket crankshaft -4-, the chain sprocket outlet camshaft -3- and screw on the camshaft adjuster -2- by hand with a new fixing screw.   Note t  Observe the marking of the running direction on the timing chain -1-. t  Observe that the guide sleeve is installed between the inlet camshaft and camshaft adjuster. t  The fixing screw of the camshaft adjuster -2- has a left-hand thread.

The timing chain must rest on the sliding rail -1- and on the chain sprocket crankshaft -arrow-.

–  Install the chain tensioner -1- and tighten the fixing screws -2- to 9 Nm. –  Tighten the timing chain, by pulling out the rig pin -T40011- from the chain tensioner. –  Check markings on the chain sprocket crankshaft and on the cylinder block; they must be positioned opposite to each other.

–  Tighten the fixing screw -2- to 40 Nm and the screw -4- to 50°Nm (use counterholder -T10172-).   Note t  First the fixing screws -2- and -4- are tightened to the torquing angle (90°), after which the timing is checked. t  The fixing screw of the camshaft adjuster -2- has a left-hand thread.

–  Screw out screw -arrows- and remove the camshaft fixer/locator -T10171 A- from camshaft housing. –  Test timing → Chapter. If timing is o.k.:

–  Hold the camshaft chain sprockets with the counterholder -T10172- and torque the screws -2- (left-hand thread) and -4- a further 1/4 turn (90°) with a rigid wrench.   Note t  The fixing screw of the camshaft adjuster -2- has a left-hand thread. t  The camshaft chain sprockets must not be turned on the camshaft when tightening.

–  Install cover of oil pump gear -1-. –  Install timing case → Chapter. –  Install crankshaft belt pulley → Chapter. –  Install the V-ribbed belt → Chapter. –  Replace the gasket rings for the caps of the camshafts and oil before assembly. Further installation occurs in a similar way in reverse order to removal.