Re: [AMC-list] Fwd: Nash 234.8 OHV six

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: "William 'Chip' Lamb" <chip@xxxxxxxxxx>
" 
" 
" >nash content: the 234.8 had shell insert bearings starting in '33-4,
" >but the straight 8 had babbitt bearings like an older nash six,
" >according to egge machine.  i wouldn't be surprised if both were
" >derivatives of that '20s design.
" 
" Re Babbitted 8s - not by 1940 they did not. Couldn't have taken that 
" much longer to change over. The 8 was still on paper for '42 but the 
" number of 4280s produced must have been incredibly small if any.

you're right about it going to '42, but egge shows 'rebabbitt 9 mains'
the whole time and no cam bearings, though '34-'42 shows cb56 and
cr860 for the conrod, and rod forging #25177 which is the same as
the 234.8 '34-'49.

just learned from their babbitt pg - it wasn't always poured directly
into the block; sometimes a steel or bronze shell was used, making
changeover to insert bearings much easier.

" The 1940 and earlier OHV 6 engine had much more in common with its 
" forebears. Major revisions took place in 1941 and again in 1950. It's 
" probably fair to say that the 1950-later engine (bumped up to 252 
" around that time) has a lot in common with the 232/258 for decades to come.

likely true - but like the 172/184/196 it must've been a work in
progress, and its design may have roots as far back as the '25 special
6.

any way, this 8 would be the cool period-appropriate motor to have in
one of those nash tow trucks...
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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