Mr Polson 10,214 Posted March 28, 2014 Hey guys, Wondering if there is a way to tell if my crank has been grinded before? Would there be a mark somewhere, or do I measure something to find out? Share this post Link to post Share on other sites
Stevemack 122 Posted March 28, 2014 You'll need a micrometer to measure the journals, then compare readings to standard specs. 2 Mr Polson and Trev Vaa reacted to this Share this post Link to post Share on other sites
PRO250 1,506 Posted March 28, 2014 if you have the bearings look at them. it will have the size on them 010 020 030 or standed STD 4litres do a bearing thats standed +1 thow cranks in 4litres must never stuff up 1 Trev Vaa reacted to this Share this post Link to post Share on other sites
Mr Polson 10,214 Posted March 28, 2014 I can get a micrometer, so I'll do that. Don't have the bearings so can't check them. Anyone know the standard measurement of a 351 Clevo crank? Share this post Link to post Share on other sites
PRO250 1,506 Posted March 28, 2014 Mains 2.749"Rod 2.311" Share this post Link to post Share on other sites
PRO250 1,506 Posted March 28, 2014 If you check it with mics i better give a buffer as that one size is just middle sizeMains 2.7484 bottom size 2.7492 top sizeRod 2.3103 bottom 2.3111 top Share this post Link to post Share on other sites
Mr Polson 10,214 Posted March 29, 2014 Cheers, I'll measure it up on Monday see what I get Share this post Link to post Share on other sites
bear351c 10,273 Posted March 31, 2014 Usually a regrind is 0.010" at a time, eg: 2.750", then 2.740" etc etc...... Metric is around 67.85mm (I think??) 1mm is around 0.040 thou, most bearings, both conrod and mains, are stamped in inches. Share this post Link to post Share on other sites
Mr Polson 10,214 Posted April 2, 2014 Checked it today, she's all stock standard. Share this post Link to post Share on other sites
bear351c 10,273 Posted April 2, 2014 Awesome ! Will get years out of it. Share this post Link to post Share on other sites
Mr Polson 10,214 Posted April 2, 2014 That's the plan! Just need to sort out everything else now... Share this post Link to post Share on other sites