SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4 cylinder Injection engine (1.2 l direct injection engine, turbocharger) | Engine cylinder head, valve gear | Cylinder head | Removing and installing the distribution chain of the control pump

Install the distribution chain

–	Install the drive chain -1- from below to the front ring gear -2- and guide it upwards between the guide rail and tensioning rail.

–	For example, secure the drive chain with a screwdriver -3- so that it cannot drop.

–	Fit the timing chains -1- on the pinion -2-.

The timing chain must be in the section of the guide rail -3- and be slightly taut.

–	Tighten the new securing bolt by hand.

The distribution chain must run across the centre of the tensioning rail.

–	Tighten the chain tensioner to 60 Nm.-arrow-.

–	Tighten the camshaft sprocket with a new securing bolt -arrow 1- to 50 Nm.

Note

The securing bolt is rotated another ¹/₄ 90° after checking the valve timing at the end of the process.

–	Immobilise the camshaft wheel using the counterhold tool -T10172-.

–	Remove the camshaft clamp -T10414- from the camshaft.

–	Unscrew the locking bolt -T10340- from the cylinder block.

–	Turn the crankshaft in the direction of engine by 2 rotations.

–	Check distribution timing → Chapter

If timing is OK:

–	Install the lower valve timing housing → Chapter.

–	Install the oil pump cover -1-.

–	Install sump → Chapter.

–	Install the crankshaft pulley → Chapter

–	Install poly V-belt → Chapter.

–	Fit the upper valve timing housing → Chapter.

–	Fill up coolant → Chapter.

Further assembly is basically the reverse of the dismantling sequence.