Re: super a engine questions

Posted by captaink on January 19, 2006 at 09:18:44 from (66.115.214.56):

In Reply to: Re: super a engine questions posted by Janicholson on January 19, 2006 at 08:53:37:

I can’t emphasize measuring crankshafts enough. I took my dad’s M apart and it had 0.003 bearings in it. I measured the crank and it measured 0.002 undersize. He insisted (used to be a mechanic himself) that a crankshaft never gets bigger, so put 0.003 bearings back in. (You know how that is, kids don’t know anything :>) ! ) Well, turned out that that the 0.003s were too tight but having a stubborn German streak in him, he insisted on leaving them in. Well, not too many hours later, the bearings started disintegrating and coming out with the oil. Cost me an early overhaul and a crank grind.

One lesson I learned was to always measure a crankshaft before ordering bearings. The other was to listen to the young bucks! Don’t just assume that they don’t know what they are doing, but check their work to make sure before you assume (ahh…you know what the word stands for). :>) (BTW I do try to listen to my young sons, many times they are not quite 100% right, but usually they are thinking and on the right track.)

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