Quote:
Originally Posted by mgarblik
The crankshaft spinning in straight and true housing bores will produce almost no bearing wear and not put any weird stress on the crankshaft. As mentioned, if done correctly, only a few thousanths of material is removed. No need to line bore IMO. Line hone only. Sonic test is nice for piece of mind. If your on the fence, look carefully in the core plug holes for divots and rust pockets on the outside of the cylinder barrels. If you see anything more than a slightly rough "as cast" finish, I would recommend checking it. I am sure you want to do it once and do it right.
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Mike, IMO the ONLY time an align bore is warranted is IF you have a spun main saddle and are installing a repair or if you are replacing the main caps. Rarely have I seen a main saddle so far "off" that it needed an align bore. Cam tunnels are a different story.