SEAT Workshop Service and Repair Manuals

Checking semi-automatic toothed belt tensioning roller checking Special tools and workshop equipment required

t  counter support -T20018A-

t  torque spanner -SAT 8010- Checking main drive tensioning roller Test sequence

–  Removing and installing cover over camshaft housing -arrows-. –  Remove air inlet duct, as well as air intake tubes, air filter → Injection and Ignition System, 4LV; Rep. Gr.24. –  Remove upper part of toothed belt guard. –  Remove ribbed belt → Chapter.

–  Loosen bolt that secures the pulley and sprocket of the toothed belt by using the counter support -T20018A-. –  Remove pulley. Refit securing bolt with two washers and tighten to secure toothed belt sprocket. –  Now turn crankshaft twice in direction of engine rotation until it is again at TDC No. 1 cylinder. –  Remove lower toothed belt guard.

–  Note the position of the tensioning roller indicator -arrow-. Press the toothed belt firmly with thumb. The indicator should move. –  Release tension on toothed belt. –  Turn crankshaft twice in direction of engine rotation. –  Then check the position of the indicator. It should have returned to its original position. If tensioning roller does not return to initial position: –  Replace tensioning roller. Checking coupling drive tensioning roller

–  Record the position of indicator of tensioning roller -arrow- (to see the marks it is recommendable to use a mirror). Press the toothed belt firmly with thumb. The indicator -1- should move. –  Release tension on toothed belt. –  Turn crankshaft twice in direction of engine rotation. –  Then check the position of the indicator. It should have returned to its original position. If tensioning roller does not return to initial position: –  Replace tensioning roller. If both tensioning rollers are OK: –  Install lower toothed belt guard. –  Refit crankshaft belt pulley. When doing this note the following: t  Replace the crankshaft pulley/sprocket securing bolt. t  On fitting the pulley, note securing with relation to the sprocket. t  Tighten the new and lubricated securing bolt to 90 Nm + 1/4 turn (90°). –  Install ribbed belt → Chapter.   Note! On fitting the ribbed belt, make sure that it is correctly located on the pulleys. –  Remove air inlet duct, as well as air intake tubes, air filter → Injection and Ignition System, 4LV; Rep. Gr.24. –  Fit upper camshaft housing cover.