The crank pulley bolt on a BMC A-series engine is 5/8" 16 TPI. I can't seem to match that to any thread series. Is it a custom truly non-standard thread, or is there a hope of finding a source for a 1.5" long bolt in that thread?
Thanks, Brian
looking for 5/8" 16 TPI bolt source
Mar 02, 2004
4 Replies
Brian wrote in article ...
If the "B" in BMC stands for "British", and the machine is older, it's quite possible that you have a Whitworth bolt - a unique creature unto itself.
Bob Paulin - R.A.C.E. Racing Chassis Analysis Services
I should have looked in Machinery's myself, rather than relying on a new-fangled Google search! thanks!
I am dry-sumping the engine, and need to drive a minimum 1/2" wide gilmer pulley for the oil pump in addition to the normal crank damper and water pump pulley. One design would work better if I could get a longer bolt to hold the pulleys on with. It's British Motor Company (British Leyland, etc.) and the engine is a 1071cc Formula Junior engine for a 1960's Cooper.
Brian
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