Re: 356 crankshaft weights question

Posted by Owen_Dyneto On 2011/6/22 15:38:51

Perhaps he might be better advised to send it to a crankshaft shop that had done this successfully before. Here's how it's been described to me by a shop that does it; set up a milling machine to cut the welds and heads from the counterweight retaining bolts. Then lift the weights off, and then remove the remains of the bolts. Turn the shaft as needed.

They then make their own new retaining bolts with long extended shanks the diameter of the opening in the weight, and have them heat-treated. Bolt the weights back on TIGHT; cut off the excess bolt shank length, mill a bit of relief to the shanks into the recess in the counterweight, and then weld them up. Then balance.

Don't forget to note which counterweight went in which position, I seem to recall they are not identical.

Or Dave, if you get that call from Steve Babinsky who I referred to you the other day, ask him - he does this type of crankshaft on a regular basis.