Connecting rod play 657x

[JACKOMO]

I recently purchased a new piston kit for my 94 xp 657x. I noticed some play and noise from the cylinder block when turning over the engine manually. It doesnt seem solid.

I realize the connecting rod/pin play is minimal, but is there supposed to be any noise/tinging from the connecting rod/piston when turning it over manually.

The piston and pin is WSM, however I ordered a kit for a 94xp and received one for a 93. I was assured that there is no difference but I dont feel confident about that anymore. Would the piston bore and piston pin be any smaller in a 93 in comparison to a 94 which would cause excessive play between the connecting rod and piston?

I can put my fingers through the rotary valve intake port and can feel play between the connecting rod and piston pin. Is this normal?

Hope someone can help. I don't want to fire the thing up and have to fix it again.

Thanks

 

[timmyboy76]

besides the port-hole shapes, only other difference between an "X" motor and non-X, is deck height....cranks' still the same, pisdtons..etc, but the head, instead of the "recess" cut in the non-X motor, they raisedthe deck surface up 1mm, leaving the head, untouched and actually running cooler.

You made sure, no needle bearings were missing,..etc

 

[JACKOMO]

Thanks for your response!!

So just to confirm there is no difference in the pistons/piston bore itself in a 93 or 94?

So there is supposed to be no play or noises from the connecting rod/piston when pto flywheel turned over manually?

The needle bearings are caged.

 

[timmyboy76]

those bearings, can still fall out..anyway, yup, no difference in piston,rods..etc, but I dont think the "rod" should "fall" on inside the cylinders/case...some lateral play, but dont think vertical play.

 

[JACKOMO]

Well you were right about the needle bearings. For some reason the needle bearings that came with the 93 kit had a smaller diameter, thus the reason for the excessive play. I found proper new bearings that eliminated the play. Thanks for your help!