Cadillac engine knowledge
(→Transmission Bolt Patterns) |
(→Transmission Bolt Patterns) |
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The ~1968-up 368, 425, 472, and 500 cid engines all use a "BOP" (Buick/Olds/Pontiac) bellhousing bolt pattern, so a TH350 or TH400 or "uni-bell" automatic will bolt right up to the back of the block as long as the proper Cadillac flexplate and torque converter are used. | The ~1968-up 368, 425, 472, and 500 cid engines all use a "BOP" (Buick/Olds/Pontiac) bellhousing bolt pattern, so a TH350 or TH400 or "uni-bell" automatic will bolt right up to the back of the block as long as the proper Cadillac flexplate and torque converter are used. | ||
| − | The '56-'64 365/390/429 use a Cadillac-only "flat top" bolt pattern, which does not share dimensions with other GM bolt patterns. In 1965 most Cadillacs (there was a unique '64 carryover for '65 commercial cars) received a new "pad-mount" starter motor, which with two vertical bolts held the starter to a cast block pad. Previous design was a "flange mount" starter which bolted to the bell housing | + | The '56-'64 365/390/429 use a Cadillac-only "flat top" bolt pattern, which does not share dimensions with other GM bolt patterns. In 1965 most Cadillacs (there was a unique '64 carryover for '65 commercial cars) received a new "pad-mount" starter motor, which with two vertical bolts held the starter to a cast block pad. Previous design was a "flange mount" starter which bolted to the bell housing. In the case of the unique '64 with a factory installed engine-to-transmission adapter, the starter bolted to an adapter plate which was "sandwiched" between the block and an early Buick bolt-pattern TH-400. TH400 crankshafts use a flange and pilot which are not dimensionally the same as those of "Jetaway" crankshafts. . |
===TH350 and TH400=== | ===TH350 and TH400=== | ||
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