I've got a Volvo Penta MD7A with a failed CAV fuel injector pump. I'm removing it but want to make sure it is timed properly when I re-install it. The timing marks on the flywheel and block are rusted/painted over and I can't find them. I have no idea where to even start looking for them since the manual doesn't say where they are. What does the manual mean when it says "Rotate the flywheel until the valves on No. 2 cylinder "rock". Also, which is the #2 cylinder?