Skoda Workshop Service and Repair Manuals

Setting the timing for the cylinder head version B For engine with identification characters CFNA Special tools and workshop equipment required t  Adapter for dial gauge -T10170- t  Fixing bolt -T10414-, 2 pieces t  Counterholder -T10172- t  Counterholder -T30004 (3415)- t  Rig pin -T40011- t  Dial gauge Work procedure –  Remove timing case → Chapter.

–  Insert the spacer sleeve, the crankshaft belt pulley -2- and the fixing screw -3- in order to turn the crankshaft. Tighten the crankshaft screw (to do so, use the counterholder -T30004-). –  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. –  Turn crankshaft 45° in the opposite direction of rotation of the engine.

–  Press the tensioning rail -1- in -direction of arrow- and interlock the piston with the rig pin -T40011-.

–  Mark with a suitable felt-tip pen the direction of rotation of the timing chain -3-. –  Release screws -2- and remove the camshaft chain sprockets -1- and -5- with the timing chain -3-. Use counterholder -T10172- to counterhold. –  Re-insert camshaft chain sprockets -1- and -5-. –  Replace the screws -2- and tighten to 50 Nm. Use counterholder -T10172- to counterhold.

–  Remove caps -arrows- for camshafts. –  Turn the camshafts until the fixing bolts -T10414- slide into the inlet and outlet camshafts up to the stop.

The interlocking lugs -arrow 1- must engage in the holes -arrow 2- of the camshafts.   Note When turning, the camshafts must not be moved axially.

–  To secure the fixing bolts -T10414-, screw in the fixing screws -arrows- for the caps of the camshafts by hand, do not tighten forcefully.

–  Release screws -2- of camshaft chain sprockets.    Absolutely use counterholder -T10172-.   Caution Do not use the fixing bolts -T10414- as a counterholder. –  Remove a camshaft chain sprocket. –  Place the timing chain onto the camshaft chain sprockets in compliance with the running direction and reinsert the removed camshaft chain sprocket. –  Screw in the camshaft screws so far so that the camshaft chain sprockets can be turned. –  Tighten the timing chain, by pulling out the rig pin -T40011-.

–  Rotate crankshaft to TDC for cylinder 1.    Permissible deviation from TDC for cylinder 1: ± 0.01 mm   Note 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.

–  Hold the camshaft chain sprockets -1- and -4- in this position with the counterholder -T10172- and tighten screws -2- to 50 Nm.   Note When tightening the camshaft screws, the crankshaft must not turn and the timing chain -3- must remain tightened. –  Remove the two locking bolts -T10414-. –  Once again turn the crankshaft by 2 turns in the direction of rotation of the engine on TDC for cylinder 1.    Permissible deviation from TDC for cylinder 1: ± 0.01 mm –  Insert the two fixing bolts -T10414- again into the camshafts up to the stop.

The interlocking lugs -arrow 1- must engage in the holes -arrow 2- of the camshafts. If the fixing bolts -T10414- are not insertable: –  Repeat setting → Chapter. If the fixing bolts -T10414- are insertable:

–  Remove both fixing bolts -T10414-, hold the camshaft chain sprockets with the counterholder -T10172- and torque the screws -2- a further 90° (1/4 turn) with a rigid wrench. Continued for all engines   Note The camshaft chain sprockets must not turn when tightening. –  Once again turn the crankshaft by 2 turns in the direction of rotation of the engine on TDC for cylinder 1.    Permissible deviation from TDC for cylinder 1: ± 0.01 mm –  Insert the two fixing bolts -T10414- again into the camshafts up to the stop.

The interlocking lugs -arrow 1- must engage in the holes -arrow 2- of the camshafts.

l  The timing is O.K., if the fixing bolts -T10414- slide fully into the camshaft openings and can be secured with the fixing screws -arrows- for the caps of the camshafts. If the fixing bolts -T10414- cannot be inserted into the camshaft holes up to the stop, the timing is incorrect: –  Repeat setting → Chapter. The further assembly is carried out in reverse order to disassembly. However, pay attention to the following: t  Install timing case → Chapter. t  Install the V-ribbed belt → Chapter. t  Replace the gasket rings for the caps of the camshafts and oil before assembly.