CRG Discussion Forum
Camaro Research Group Discussion => Restoration => Topic started by: Dusk_Blue_Z on March 03, 2018, 02:12:16 AM
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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.
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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?
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They found hairline cracks, but what else did the say or recommend?
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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.
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I would get a second opinion from a different shop and see what it say's
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I'm curious if it isn't heatchecks vs cracks, I would get a second opinions to the value of the cranks.
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It could be a function of 'heat' and the tufftride surfaces put on those cranks; I think cutting a few thousands will eliminate both... :)
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50 years of 1178 cranks and you have TWO outliers???? Second opinion is warranted.
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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.
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Find a different shop.
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I think I would look elsewhere also. I have had 2 sets of heads deemed worthless by two different people. Running both today.
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Did he say they were junk, but still offered to take them off your hands?