944 S L4-2479cc 2.5L DOHC (1987)
8. Slide special tool on to belt. Push in gauge needle (arrow) until lockpin is heard to engage and read value from dial gauge.
Note: Always zero telltale needle on gauge after lockpin has engaged (turned anticlockwise) to exclude wrong gauge readings.
Specifications: 2.7 ± 0.3 dial value
If necessary, correct belt tightness.
Adjusting
9. Turn tensioning roller clockwise to increase tension. Turn anti-clockwise to slacken. Tighten hex nut to 45 Nm (33 ftlb) while countering.
10. After adjusting drive belt tension, adjust idler pulley. Use special tool 9207 or 0.5 mm feeler gauge so there is a clearance of 0.5 mm between
drive belt and pulley when 0 to 1 mm pretension is applied to upper run of toothed belt. Tighten idler pulley in this position. If correct gap cannot
be reached, turn idler pulley 180° and repeat adjustment. Tighten hex nut to 45 Nm (33 ftlb) while countering.
11. Install Poly-Rib belt and adjust; See: Drive Belt/Adjustments
Note: Slides must make full-surface contact with belt. While measuring, do not allow the Special Tool to turn or move on the belt.
