Skoda Workshop Service and Repair Manuals

Setting the timing for the cylinder head version A For engine with identification characters BTS, CFNA, CLSA Special tools and workshop equipment required t  Adapter for dial gauge -T10170- t  Camshaft fixer/locator -T10171A- t  Counterholder -T10172- t  Counterholder -T30004 (3415)- t  Rig pin -T40011- t  Dial gauge Work procedure –  Remove cover for camshaft housing and air filter housing → Chapter. –  Remove cap for camshafts. –  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-. For engine with identification characters BTS   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. –  Mount again camshaft adjuster -1-. –  Replace screws -2- and -4- and tighten the screw -2- to 40 Nm and the screw -4- to 50 Nm. Use counterholder -T10172- to counterhold. For engine with identification characters CFNA, CLSA

–  Release screws -2- and remove chain sprocket of inlet camshaft -1- with timing chain -3-. Use counterholder -T10172- for this purpose. –  Re-insert the chain sprocket of the inlet camshaft -1-. –  Replace the screws -2- and tighten to 50 Nm. Use counterholder -T10172- to counterhold. Continued for all engines

–  Turn the inlet and exhaust camshaft until the camshaft fixer/locator -T10171A- can be inserted up to the stop into the camshaft openings. l  The locking bolts -arrows 1- must engage in the holes -arrows 2-. The inscription „TOP“-arrow 3- must be at the top.   Note When turning, the camshafts must not be moved axially.

–  To secure the camshaft fixer/locator -T10171A- screw in a M6 screw -arrow- by hand; do not tighten. –  Slacken screws of the camshaft sprockets.    Absolutely use counterholder -T10172-.   Caution Do not use the camshaft fixer/locator -T10171A- as a counterholder. –  Removing the 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. For engine with identification characters BTS

–  Hold the camshaft chain sprockets -1- and -5- in this position with the counterholder -T10172- and tighten the screw -2- (left-hand thread) to 40 Nm and the screw -4- to 50 Nm. For engine with identification characters CFNA, CLSA

–  Hold the camshaft chain sprockets -1- and -4- in this position with the counterholder -T10172- and tighten screws -2- to 50 Nm. Continued for all engines   Note When tightening the camshaft screws, the crankshaft must not turn and the timing chain -3- must remain tightened. –  Remove the camshaft fixer/locator -T10171A-. –  Turn the crankshaft in direction of rotation of engine by 2 turns on TDC for cylinder 1.    Permissible deviation from TDC for cylinder 1: ± 0.01 mm.

–  Insert camshaft fixer/locator -T10171A- up to the stop into the holes in the camshaft housing. If the camshaft fixer/locator -T10171A- is not insertable. –  Repeat setting. If the camshaft fixer/locator -T10171A- is insertable. For engine with identification characters BTS

–  Remove the camshaft fixer/locator -T10171A-, hold the camshaft chain sprockets with the counterholder -T10172- and torque the screws -2- (left-hand thread) and -4- a further 90° 1/4 turn with a rigid wrench. For engine with identification characters CFNA, CLSA

–  Remove the camshaft fixer/locator -T10171A-, hold the camshaft chain sprockets with the counterholder -T10172- and torque the screws -2- a further 1/4 turn (90°) with a rigid wrench. Continued for all engines   Note t  On engine with identification characters BTS, the fixing screw of the camshaft adjuster -2- has a left-hand thread. t  The camshaft chain sprockets must not turn when tightening. –  Turn again the crankshaft in direction of rotation of engine by 2 turns on TDC for cylinder 1.    Permissible deviation from TDC for cylinder 1: ± 0.01 mm.

–  Insert camshaft fixer/locator -T10171A- up to the stop into the holes in the camshaft housing. If the camshaft fixer/locator -T10171A- is not insertable. –  Repeat setting. The further assembly is carried out in reverse order to disassembly. However, pay attention to the following: t  Install timing case → Chapter. t  Replace the gasket rings for the caps of the camshafts and oil before assembly.