Replace crank seals before new cylinder?

[volvo2før]

I'm doing a cylinder job on a husky 345 and swapping out the clamshell cylinder with a 346xp cylinder. The 340 cylinder has '' grooves'' where it clamps over the crankseals, which has left marks in the seals. The 350 spacer I need to use between crank and 346 cylinder doesn't have this grooves so I'm worried if it will seal up and run correctly. What do you think?

 

[volvo2før]

No one?

 

[hatchet13]

Personally I would

 

[Huskybill]

With the top end of the crank case I clean it first then on a flat plat using sandpaper make sure both surfaces that seal are perfectly flat. So far everyone I pull apart is warped between the securing holes. I would change the seals, I put a skin coat of Yamaha bond on the outer side of the bearing seals anyway. The two crankcase halves gets a coat of Yamaha bond too.

If anyone has a better way of doing it please chime in.

 

[9050LX]

With the top end of the crank case I clean it first then on a flat plat using sandpaper make sure both surfaces that seal are perfectly flat. So far everyone I pull apart is warped between the securing holes. I would change the seals, I put a skin coat of Yamaha bond on the outer side of the bearing seals anyway. The two crankcase halves gets a coat of Yamaha bond too.

If anyone has a better way of doing it please chime in.

I cover any potential air leak path so yeah, sounds about right.