SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4-Cyl. injection engine (1,0 ltr.-engine, 2-valve) | Enginecrankshaft group, pistons

Removing, installing and tensioning toothed belt

Special tools and workshop equipment required

t	Torque wrench -SAT 8010-

Removing

–	Remove air cleaner → Chapter, Dismantling and assembling air cleaner.

–	Remove ribbed belt → Chapter.

–	Remove belt pulley as well as upper and lower toothed belt guard.

–	Mark D.O.R. of toothed belt.

–	Release tensioner and take off toothed belt.

Installing

Prerequisites

l	The engine must be no more than warm to touch.

l	The pistons must not be positioned at TDC.

Note!

If a piston is at TDC the valves could strike the piston when turning the camshaft.

Work sequence

–	Set camshaft sprocket to mark -arrow A-.

–	Set the crankshaft to TDC No. 1 cylinder.

The lowered cog on the wheel for the ribbed belt of the crankshaft must match the mark made on the oil pump -arrow B-.

–	Fit toothed belt. For used belts note direction of rotation.

–	Install tensioning roller and tighten securing bolt hand-tight. The slot in the base plate -1- must locate around securing bolt -2-.

–	Tension toothed belt by turning the tensioning roller in direction of arrow until the indicator -3- aligns with the groove in the base plate -arrow-.

–	Tighten clamping the bolt/nut on tensioning roller. Tightening torque: 20 Nm

–	Now turn the crankshaft two turns in engine direction of rotation until it is again at top dead centre No. 1 cylinder.

–	Now the position of the toothed belts and tensioning roller must be checked again.

–	Install toothed belt guard upper and lower parts.

–	Install belt pulley (note fixing arrangement). Tightening torque: 20 Nm

–	Install ribbed belt → Chapter.

Note!

When assembling the ribbed belt, make sure that it is properly housed in the pulleys.

–	Install air cleaner → Chapter, Dismantling and assembling air cleaner.

SEAT Workshop Service and Repair Manuals