2003 Ski-Doo ZX Series Factory Shop Manual, Page 124Get this manual
Section 04 ENGINE Subsection 02 (377, 503 AND 552 ENGINE TYPES)
Spread seam of 1.2 mm (116 in) maximum in diameter on surface of lower crankcase half
503 and 552 Engine Types
A30C2WA
A17C08A
TYPICAL
TIGHTENING SEQUENCE FOR 503 ENGINE TYPE
As far as possible, sealing compound must be applied in one run to avoid any risks of leaking through the crankcaseAlign both crankcase halves before tightening screwsPosition the crankcase halves together and tighten bolts by hand then install and tighten armature plate on magneto side to correctly align the crankcase halvesScrew the central bolts (bolts nos1 to in the torquing sequence) to squeeze compound between crankcase halves before it starts to dryNOTE: Sealing compound spreading plus screwing of engine four central bolts must be performed within minutes to ensure good sealing and avoid linkingScrew all crankcase bolts in place in the following sequence and to the appropriate torque through two steps torquing: first, screw bolts up to 60 of the final torque (13 Nm (115 lbfin) for M8 bolts), then, tighten to the required torque (i.e22 Nm (16 lbfft))