2003 Ski-Doo ZX Series Factory Shop Manual, Page 143Get this manual
Subsection 04
Section 04 ENGINE (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
1Check weep hole below coolant pump housing with soapy water
A32C1JA
1Weep hole
If there is leak, it indicates that pump shaft is defective (oil seal beside coolant ceramic seal)2Leaks can be also on oil pump sideCheck mounting area for leaks