I have two 1178 cranks that haven't been ground. Brought them to a crankshaft shop and they magged both of them and found many small hairline cracks. Is that normal for these particular cranks? Thanks.
I would guess that the 'hairline cracks' are only in the surface of the journal, unless the machinist had a better idea... turning them 0.010 might totally take care of them?
They found hairline cracks, but what else did the say or recommend?
They said I could have them ground but they won't warranty/guarantee that they would come out clean. I'll get one of them ground and see how it comes out.
I just found it odd that cracks were prevalent in both. Makes me think small hairline cracks are 'normal' for these cranks. Thanks for the replies.
I would get a second opinion from a different shop and see what it say's
I'm curious if it isn't heatchecks vs cracks, I would get a second opinions to the value of the cranks.
It could be a function of 'heat' and the tufftride surfaces put on those cranks; I think cutting a few thousands will eliminate both... :)
50 years of 1178 cranks and you have TWO outliers???? Second opinion is warranted.
Thump the flange end of crankshaft on a concrete floor. It will have a distinct sound if its cracked. Your crank shop should know this.
Find a different shop.
I think I would look elsewhere also. I have had 2 sets of heads deemed worthless by two different people. Running both today.
Did he say they were junk, but still offered to take them off your hands?