Skoda Workshop Service and Repair Manuals > Fabia Mk1 > Power unit | 1,2/40; 47 kW MPI engine | Enginecrankshaft group, pistons | Removing and installing the camshaft sprocket, setting the timing | Removing and installing the camshaft sprocket, setting the timing | For engines with identification characters AZQ, BME

For engines with identification characters AZQ, BME

Removing the camshaft sprockets

–	Interlock camshafts and crankshaft at TDC for cylinder 1 → Chapter.

–	Remove timing case → Chapter.

–	Lock control chain tensioners → Chapter.

–	Remove control chain tensioners with rubber stop.

–	Remove the camshaft screws and take out the camshaft sprockets.

–	Screw in the crankshaft screw with housing and belt pulley - crankshaft.

Tightening torque: 90 Nm + torque a further 45° (¹/₈ turn)

–	Remove the fixing bolt -T10121- and turn the crankshaft 45° against the direction of rotation of the engine.

Work can be performed on the valve drive while it is in this position.

Installing the camshaft sprockets, setting the timing

l	The pistons must not be positioned at top dead centre.

Note

t	To turn the camshaft when the sprocket has been removed one can screw in a screw with two washers to a maximum of 50 Nm + 45° (¹/₈ turns) into the camshaft and turn the camshaft. The pistons must not be at TDC.

t	The central screws of the camshafts and the washers of the sprockets on engine with identification characters AZQ are to be replaced when the camshafts are removed.

t	The camshaft fixer/locator -T10123- must not be used as a fixing lever to loosen and tighten up the camshaft screws.

t	The engine can be easily turned once the spark plugs have been removed.

–	Position camshafts to TDC of cylinder 1 and lock into place → Chapter.

–	Screw out the camshaft screws.

–	Remove oil residues on the camshaft studs and camshaft sprockets in the points of contact using a clean cloth.

–	Place the camshaft sprockets with the control chain laid on it on the camshafts and screw in the new camshaft screws so that the camshaft sprockets can still turn.

–	Install tensioner with rubber stop → Chapter.

–	Tension control chain → Chapter.

–	Turn the crankshaft through a further 45° in the direction of rotation of the engine to TDC for cylinder 1 and interlock.

Note

t	If the crankshaft is turned beyond TDC for cylinder 1 (observe the marking on the flywheel) then it should turned back and the TDC for cylinder 1 set again.

t	If the crankshaft is turned further it will collide with the piston on the valves.

–	Tighten the screw -2- of the camshaft chain sprockets -1- to 50 Nm (use counterholder -MP1-216-).

–	Then, torque the bolts a further 90° (¹/₄ turn) with a rigid wrench.

Tightening torque: 50 Nm + torque a further 90° (¹/₄ turn)

Note

The assistance of a 2nd mechanic is required for this work.

–	Carefully crank engine at least 2 revolutions to ensure that no valve touches the piston when the engine is started, check timing again → Chapter.

Further installation occurs in reverse order.

–	Check position of camshaft to crankshaft in the display group 012 display field 3 and 4 → Vehicle diagnostic tester.