" From: "Geoff Harrison" <geoff_h@xxxxxxxxxxxxxxxx> " " Hi all, in a recent post there was mention of AMCs dealings with GM in " regard to Buick V6. (and also Mazda rotary) " Does any one know what AMC did in the way of development of the V6. I " understand when GM took it back it was different. The oil pump looks very " AMCish for one. And I believe the engine grew a few cubes. Some reference I " have seen states the balance shaft in Mitsubishi 4s in under licence to " Chrysler. So did AMC put the balance shaft in? I don't know if the 225 V6 " had the balance shaft. no, to both cubes and balance shaft. i've heard kaiser used a very heavy flywheel and that their v6 will idle smoothly down to 200rpm. don't have data handy, but i believe the front cover is also unchanged. amc did nothing in development; they sold the tooling back to gm when they bought kaiser. a brief history of the v6: 1. 215 aluminum v8 '61-3, rover '66?-'00? 2a. iron and aluminum 196 v6; rare, dates unknown 2. conversion to iron, 300 v8 / 225 v6 there were a few aluminum 225s too, largely experimental iirc. 3. 340 v8 '67? 4. 350 v8 '68-'81 5. 231 v6 '75?- 6. 252 v6 etc. up until a late[?]-'80s redesign, i believe all these engines used the same front cover, oil pump, timing set, etc. the 225 was sold to kaiser ~'65 when gm mandated chevy sixes across the corp. yup, buick and olds; the poncho ohc was a redesigned chev. the 225/300 and 340 share pistons. the 350 was a slightly overbored 340. it was natural buick would overbore the 225 to 231 when they took it back, so it could use 350 slugs. the buick is/was gm's lightest, smallest 350. considering all the effort they put into v6 speed parts i've always thought it a shame none [like the block and heads] were ever made in v8 versions. politics, i suppose. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought