Wow. Didn't realize it had only been FIVE AND A HALF YEARS since I last logged in here... I do have a question: There is a commercial customer of mine that is attempting to locate torque specs for a ROJO OHV head conversion on a 1926 Model T block, and of course, I haven't been all that lucky in doing so. Anyone have any ideas, or the actual specs themselves? Given the age of the block, the customer doesn't wish to either destroy the threads, and/or break the head casting...any suggestions would be appreciated...and yes, I could scare up pictures of this build later on, if necessary. Thank you.
Original Rajo head bolts were hex bolts. I would recommend changing to studs and nuts. If you are going to use the original bolts, check to make sure the condition of the bolts are good as well as the threaded holes in the block. I would do a test fit without the head gasket first and try to get around 45 lbs. After the test fit and assuming things go well, put the gasket in place and try 55 lbs. Probably about the same with studs and nuts, but with studs and nuts you decrease the chance of stripping the threads in the block. Good luck and post pictures!
1. The general consensus was around 45-55 lbs/ft. 2. I actually suggested studs over bolts (the first thing I suggested), but apparently, the rocker arms/girdle/lincoln logs/lego bricks/whatever it uses for rocker arms is right over the top of the bolt heads, which makes using studs impossible. 3. Yeah, I'm extremely interested in seeing this guy's build, apparently his shop is full of this kind of stuff. I'd screw around with older equipment, but I simply don't have the time to do so..now, anyway.
I don't know if there were such things as torque wrenches or torque specs in the twenties. You can get torque recommendations for any size bolt on the back page of bolt catalogs, engineers manuals, old auto repair manuals and gasket catalogs.
$um Fun, Thanks for the RAJO link, I had no idea they were making reproduction BB heads. I wish I didn't sell the one I had years ago, if my memory is correct it had a sloped back to clear the firewall on a 26-27 T. Can someone confirm that they did make one like that? Bob
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