I have someone that is asking me to look at his two 2004 msx 150. He said the one has a leak under radiator? And he said the other is making a knocking noise on the rear end of the motor. Anyone have any input on these repairs as I have not seen the skis yet so the radiator leak is kind of weird to me. Is there a closed looped intercooler for the turbo? I would suspect that the knocking would be bad crank or rod bearings but wanted to see if any polaris experts knew of any common problems.