Problem of studs sticking
Hi
Richards comment about Problem of Studs sticking/seizing was one I was going to ask about. Though I don't have a Carrier I've worked on a lot of flat heads and will be starting on a flat head project as soon as I finish with my HUP overhaul.
The question deals with why studs instead of bolts?
Lincoln in 1949 changed over from studs to bolts on its big 337 flat heads apparently because of the problem of the heads getting stuck on the studs. I have an early 49 and a late 49 engine getting the head of the early when it blew a head gasket was murder because though the engine would run the side with blown gasket would not create enough compression to break the head loose once all the the nuts on the studs had been loosened. Ended up driving wood wedges in all the way around the head to get it free. The late 49 engine has bolts which come out with an impact wrench fairly easy and once the bolts are out a gentle tap, wooden mallet the head comes off, in fact the problem is keeping from sliding to far.
According to one source the problem heads seizing to the studs was such an issue particularly with aluminum heads (on Hot Rods) that there even were very thin hole saws just large enough to fit over the studs to open up the head holes. Never have found or even seen one of this special saws though.
So to the question why studs? Is it because of concern over wear of the block threads through repeated dis-assembly and assembly for maintenance?
Cheers Phil
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