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| Broken Bloody Bolts https://slantsix.org/forum/viewtopic.php?t=37183 |
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| Author: | Moosa [ Mon Sep 21, 2009 5:20 am ] |
| Post subject: | Broken Bloody Bolts |
I have snapped the bolts that hold the exhaust manifold to the inlet manifold... I have managed to remove the snapped bolts. Today I measured the thread and it equated it to 5/16 with an 18 TPI Which according to my chart is 5/16 Whitworth. Normally I get things wrong, but today could be my lucky day, am I correct? |
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| Author: | SlantSixDan [ Mon Sep 21, 2009 6:49 am ] |
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There are no whitworth fasteners on American cars. SAE Fine and SAE Coarse, yes. |
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| Author: | Moosa [ Mon Sep 21, 2009 7:39 am ] |
| Post subject: | |
I have just run a 5/16 BSW tap through the manifold and it feels good to me. Playing more with the electrical side of life, rather than the mechanical, I have spoken to the machine worker in the shop and he explained there is a 5 degree difference thread profile between BSW and SAE. I guess if you would have all stayed within the Empire I wouldn’t be having this problem  Anyway, I had already ordered two 5/16 BSW bolts, so I will see how I go. Thanks for your advice. Ryan |
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| Author: | 65Dodge100 [ Mon Sep 21, 2009 9:52 am ] |
| Post subject: | |
| Author: | Wizard [ Mon Sep 21, 2009 10:11 am ] |
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And a small note: *please* make a clear note so you can show this to next owner if you ever sell that car and as future reference so you don't get frustrated trying to put on wrong nuts on oddball stud. Next time use correct thread that *was* used on this stuff to keep confusion down.  Cheers, Wizard |
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| Author: | Moosa [ Mon Sep 21, 2009 11:40 am ] |
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Well on further investigation it turns out that this is indeed a 5/16 BSW thread. I can only think that some where along the line someone tapped it out to this standard (only if they would have wrote a note and passed it on) Thanks for your advice 65Dodge100 & Wizard |
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