SEAT Workshop Service and Repair Manuals

Toothed belt semiautomatic tensioning roller: testing Special tools and workshop equipment required

t  Countersupport -T20018-

t  Torque spanners -SAT 8010- Test the main belt tensioning roller Test process

–  Remove the upper camshaft housing cover -arrows-. –  Remove the upper air filter element → Chapter. –  Remove the upper toothed belt shield. –  Remove the right soundproofing sump. –  Mark the direction of rotation of the Poly-V belt and remove it as follows:

–  Apply a spanner to the tensioning roller mounting bolt and move the roller in the -direction of the arrow-. –  Remove the Poly-V belt.

–  Loosen mounting bolt of the pulley and the toothed belt pinion; to do so, fix the pulley with the countersupport -T20018-. –  Remove the pulley. Screw the bolt back in with two washers to retain the toothed belt pinion. –  Turn the crankshaft over twice in the direction of engine rotation until it is back at top dead centre for cylinder 1. –  Remove the lower toothed belt shield.

–  Memorise the position of the tensioning roller indicator arm -arrow-. Press down hard on the toothed belt with your thumb. The indicator arm should move. –  Release the pressure on the toothed belt. –  Turn the crankshaft over twice in the direction of engine rotation. –  Check the position of the indicator arm. The indicator arm should be back at its original position. If the indicator arm does not return to its original position: –  Replace the tensioning roller. Test the return belt tensioning roller

–  Memorise the position of the tensioning roller indicator arm -arrow- (use a mirror to see the marks.) Press down hard on the toothed belt with your thumb. The indicator arm should move. –  Release the pressure on the toothed belt. –  Turn the crankshaft over twice in the direction of engine rotation. –  Check the position of the indicator arm. The indicator arm should be back at its original position. If the indicator arm does not return to its original position: –  Replace the tensioning roller. If both tensioning rollers are OK: –  Install the toothed belt shield. –  Reinstall the crankshaft pulley, taking the following into account: t  Replace the pulley/crankshaft pinion mounting bolt. t  When installing the pulley, check the mounting to the pinion. t  Tighten the new and oiled mounting bolt to 90 Nm + 1/4 turn (90°). –  Install the Poly-V belt → Chapter.   Note! When installing the Poly-V belt, make sure it is correctly seated on the pulleys. –  Install the soundproofing sump.