2004 Bombardier DS650/DS650 Baja/DS650 Baja X Shop Manual, Page 101Get this manual
Subsection 08
Section 03 ENGINE (CYLINDER AND HEAD)
GENERAL
NOTE: When diagnosing an engine problem, always perform the cylinder leak testThis will help pin-point problemRefer to the instructions included with your leak tester and LEAK TEST section for proceduresAlways place the vehicle on level surfaceNOTE: For better understanding, the following illustrations are taken with engine out of vehicleTo perform the following instructions, it is not necessary to remove engine from vehicleAlways disconnect the negative wire from the battery before working the engine
When disassembling parts that are duplicated in the engine, (eg: valves, springs, etc, it is strongly recommended to note their position (PTO, MAG side) and to keep the parts of the same assembly as "group"If you find defective component, it will be much easier to find the cause of the failure among its group of parts (eg: you found worn valve guideA bent spring could be the cause; it will be easy to know which one of the springs is the cause and to replace it if you grouped the parts of the same assembly at disassembly)Besides, since used parts have matched together during the engine operation, they will keep their matched fit when you reassemble them together within their "group"