If you've had the crank turned already, then you need to figure out if it's
the crank or the block that out. It's easiest to Mic the crank, and a dial
verier caliper is probably accurate enough to compare the three journals.
If you haven't had the crank turned, then look at it to see if there's
significant wear there - drag your fingernail across it and see if it
catches at all on any microgrooves. If it does, get it turned.
If you have had the crank turned, then I'd double check with red
plastigauge, and if it's 3 thou or less just put it together. I tend to
build loose engines, tho, and feel comfortable with 3 thou, but not much
more...I try for 2.5 thou.
Brian
At 11:10 AM 2/7/98 -0500, you wrote:
>Hey guys!!!
>
>I am looking for someone who is online right now who can give me some
>information. I began my engine (1275 cc. Sprite MKIV) rebuild this
>morning--used the plastiguage (green) on the mains. The front main checked out
>at .002", the middle main at .003", and the rear main at .002". The mains
>were checked dry--I wiped all oil from the surfaces, and torqued to 60 ft/lb.
>
>These seem to be outside the spec clearances. Is there anyone there right now
>who could e-mail me now to advise. Do I go on with the rebuild, or do I need
>to get it looked at by a machinist? Would like to make headway this morning
>of course.
>
>Thanks to anyone and everyone who replies!!!
>
>----David
>
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