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By Daniel Jessup - 11 Years Ago
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A fella called me today looking for a crankshaft bolt and washer for 56 Thunderbird 292 he is working on. I know that the dampener is different between the car and Tbird, but does that hold true for the bolt/washer as well? I would assume that my only concern would be the actual length of the bolt?
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By Hoosier Hurricane - 11 Years Ago
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Daniel:
The Ford parts book lists the same bolt and washer for both applications.
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By Daniel Jessup - 11 Years Ago
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thanks John, that is what I thought just wanted to make sure.
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By ian57tbird - 11 Years Ago
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Are you asking because there are two different specs in the manual? I had to remove the damper from my car, and the original bolt had been over torqued and stretched. It appears that the manual is wrong (for 57 anyway). I think the original bolt is a grade 5. I replaced mine with a grade 8 and torqued it to the correct spec for that bolt, which is about what the manual specified for Tbird.
So don't get caught out as the original bolt can't take the torque that is specified for Tbird, but I believe the lower torque is OK to use on the standard bolt in a Tbird.
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By Daniel Jessup - 11 Years Ago
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@ian57tbird...
I was more concerned about the length of the bolt/washer thickness/etc.
I will warn Roy about the torque spec. I do not believe he knows much about Y blocks. He did not know that there were different lengths of intake manifold hold-downs, and he wanted to "re-use" an oil pump drive shaft rod... ouch lol
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By slumlord444 - 11 Years Ago
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Not sure how you would stretch a fine thread bolt that big. Someone had a lot of muscle and a big breaker bar.
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By ian57tbird - 11 Years Ago
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It is only a grade 5 bolt as far as I can tell, so if someone tightened it to 130-145 foot pounds as the manual suggests for 312's then it will likely stretch.
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By ian57tbird - 11 Years Ago
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A correction on an earlier post of mine. I said that the manual specified a higher torque spec for Tbird but I should have said for 312.
Sorry it has been a couple of years since I did it and I was going from memory.
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