SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4-Cyl. Diesel engine, Mechanics | Enginecrankshaft group, pistons | Engine: removing and refitting | Toothed belt: removal and refitting, tensioning

Fitting

–	Make sure the TDC mark on the flywheel lines up with the reference mark.

–	Loosen the fixing bolt of the camshaft pinion one turn.

Note!

Loosen and tighten the bolt fixing the camshaft using tool -T20018A-, never using the adjustment rule as a countersupport.

–	Separate the camshaft pinion using the extractor -T20119-. Use a spanner as a countersupport.

–	Withdraw the camshaft pinion.

–	Fit the toothed belt on the pinion of the toothed belt-crankshaft.

–	Return roller, the pinion of the injection pump and the tensioner roller (note the turning direction).

–	Insert the camshaft pinion in the toothed belt and fix the camshaft pinion in such a way that it is still able to turn.

–	Tension the toothed belt. To this effect, turn the spanner -U-30009A- with the eccentric clockwise until the notch and the protuberance -arrows- line up.

Note!

t	If the eccentric was turned excessively, the tensioner roller should be loosened completely and tensioned once more. Not only the eccentric should be turned back the measurement it was turned excessively.

t	Make sure that the fixing hook seats correctly in the rear protector of the toothed belt -arrow-.

–	Tighten the nut provided on the tensioner bolt.

Torque: 20 Nm

–	Check the TDC mark on the flywheel once more.

–	Tighten the fixing bolt of the camshaft pinion.

Torque: 45 Nm

Note!

Loosen and tighten the bolt fixing the camshaft using tool -T20018A-, never using the adjustment rule as a countersupport.

–	Remove the adjustment rule -T20038- from the camshaft.

–	Remove the pin -T20102-.

–	Turn the crankshaft two turns in the direction of the engine until TDC is found once more in cylinder 1.

–	Check: whether the TDC mark on the flywheel is correct, whether the adjustment rule fits in the camshaft, whether the pin -T20102- fits in the injection pump, whether the tensioner roller is correctly adjusted (notch and protu bernace lined up).

–	If the notch and the protuberance do not line up, tension the tensioner roller → Chapter.

–	Fit the vacuum pump for servobrake.

Torque: 20 Nm

–	Fit the antivibrator/pulley.

Torque: 10 Nm + 1/4 turn (90°)

–	Fit the protectors of the toothed belt and the cylinder head cover.

–	Fit the poly-V → Chapter.

–	Fit the upper element of the intake manifold → Chapter.

–	Check and dynamically adjust the start of the injection: → Rep. Gr.23

SEAT Workshop Service and Repair Manuals