Thread: Rod Clearance too tight

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Originally Posted by jerry clayton

How did you check the clearance???

Many times I have have peolpe come back to me saying clearances were too tight--they had used plasticguage---took rods (or mains) torqued up, set the crank size on my Sunnen guage, and the rod or main had the clearance needed---It has always been a plastic guage and too tight deal that didn't prove out to be tight--- but keep checking

yep it is not that close on rods we tested some time ago seams on rods it reads small .hard to beat the sunnen

Thanks for the replies guys. Yes, I did use plastigauge. I adhere strictly to the procedure for using plastigauge. I have not checked with micrometers. I pretty much gave up after checking number1 and 2 cylinders when I read .0015''. I used the green plasticgauge with nothing to keep it in place and torqued to 55#.
Because I have stretched the first 2 cylinder bolts (4bolts) do you think that when i install the first 2 cylinders again, i should simply torque them and use a stretch gauge on the remaining cylinders? Thanks again.

Originally Posted by flanker1970

Thanks for the replies guys. Yes, I did use plastigauge. I adhere strictly to the procedure for using plastigauge. I have not checked with micrometers. I pretty much gave up after checking number1 and 2 cylinders when I read .0015''. I used the green plasticgauge with nothing to keep it in place and torqued to 55#.
Because I have stretched the first 2 cylinder bolts (4bolts) do you think that when i install the first 2 cylinders again, i should simply torque them and use a stretch gauge on the remaining cylinders? Thanks again.

take one of your rods you check and use a bore gauge .find some one that has one or buy one there not to much if you buy a cheap one on E bay sunnen is the best but $$ you can find them used on e bay if your building engines alot it good to have .that s the only way to check them. mic your crank . then with your mic set. O off a bore gauge to mic.check your rod with bearing in it all tq from 12:00 and 6:00 see what you have now if its 1.5 or 002 or ?