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el6147 02-23-2013 17:09:47 50.124.60.237 Report to Moderator

if you are confused as to why your plastigage always shows as being .003 its because it will only crush so far, as to what your problem is I don't know but one thing to check is the size of the rod with no bearing insert installed , the rod bore may be under size . I had a machine shop resize four rods for me for a 1010 John Deere and every one of them was .010 under and the first one that I installed showed that there was .003 clearance with plastigage also, first one I installed and torqued down locked the crank up , the shop tried to convince me over the phone that my bearings were not correct for the application. Shop tech doing the work read the mic incorrectly when he honed them . I purchased a bare block for a 1650 from a salvage yard about 10 years ago and when I installed all the bearings and the crank and torqued the mains the crank would not turn . one by one I loosened each of the mains until the crank would spin , turns out that one main journal was under size from all the rest and I had to have the block line bored to fit the bearings properly . I have no idea why one was smaller than the rest but if I would Have to guess I would assume Waukesha had some bearings that weren't sized correctly and rather than scrap them they just under bored the block and used them up . [Reply]   [No Email]