Bombardier SeaDoo 2007 factory shop manual, Page 143Get this manual
Section 03 ENGINE Subsection 70 (CYLINDER HEAD)
GENERAL
NOTE: When dagnosingan engine probleml always perform an engine leak testThis wilt help pin-point problem, Refer to ENGiNE LEAK TEST section for proceduresAlways place the vehicle on level surfaceAlways disconnect the negative wire from the battery before working on the engineEven if the removal of many parts is not necessary to reach another part, it is recommended to remove these parts in order to check themFor installation, use the torque values and Loctite products as mentionedClean threads before using Loctite product when installing screwsWhen disassembling parts that are duplcatedin the engine, (e-g valves, bushings), it is strongly recommended to note their position (cylinderor 3) and to keep them as l'group'lm If you find defective component, it would be much easier to find the cause of the failure within the group of parts (eg you found worn valve guideA bent spring could be the cause and it would be easy to know which one among the springs is the cause to replace it if you grouped them at dkassembly)Besides, since used parts have matched together during the engine operation, they will keep their matched fit when you reassemble them together within their "group1'