On later version engines an O-ring has been introduced as a seal between the injection pump and the block . Only so-called hard shims may be used on these engines when shimming . Hard shims are available in thicknesses of 0 .2 mm (0 .0079 in), 0 .3 mm (0 .0118 in), 0 .6 mm (0 .0024 in) and 0 .9 mm (0 .0354 in) . 16 . New block or camshaft If the block or the camshaft are replaced the block must be measured and marked, using the setting-disc p/n 884787 and a sliding caliper . A . The setting-disc consists of two rings, an inner and an outer . The inner ring determines the injection angle for each respective engine type, see Technical Data (page 25) .
The injection angle is stamped in degrees and is fixed with a pin (1) . B . Mount the setting-disc or the pulley with two bolts, do not tighten the bolts . Turn the setting-disc pin (2) comes in the largest of the four holes in the pulley . Press in the guide pin (2) so that the disc is centered and tighten the bolts . The setting-disc is marked for each respective cylinder : Marking Denotes Cylinder 1 Cylinder 1 (1, 2, 3 cylinder engines ; Cylinder 2/2 Cylinder 2 (2 cylinder engine) Cylinder 2/3 Cylinder 2 (3 cylinder engine) Cylinder 3/3 Cylinder 3 (3 cylinder engine) so that the guide