Pontiac V8 engine
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The factory cranks are good. But if a crank is needed, it would be worth looking at a stroker to make a 400 into a small journal 455. Smaller main journals of the 400 make it a better foundation for building a high performance 455 than an OEM 455 block. | The factory cranks are good. But if a crank is needed, it would be worth looking at a stroker to make a 400 into a small journal 455. Smaller main journals of the 400 make it a better foundation for building a high performance 455 than an OEM 455 block. | ||
| − | Detailed info on crankshafts can be seen | + | Detailed info on crankshafts can be seen on Ken's Speed & Machine site (currently the URL is being blocked by the wiki spam filter- POS that it is. See the '''discussion''' page for the addy. |
{{Note1}}Starting around 1966-'67, not all cranks were machined for a pilot bearing, so be sure to check to see if the crank needs machining before installing the crank if a manual transmission is to be used. | {{Note1}}Starting around 1966-'67, not all cranks were machined for a pilot bearing, so be sure to check to see if the crank needs machining before installing the crank if a manual transmission is to be used. | ||
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;[[Pontiac V8 engine #Parts interchangeability|Return to Parts interchangeability]] | ;[[Pontiac V8 engine #Parts interchangeability|Return to Parts interchangeability]] | ||
| + | ===Pontiac crank numbers=== | ||
| + | <pre> | ||
| + | Year Engine Material Crank# Notes | ||
| + | 1939-1954 all 6cyl 506176 | ||
| + | 1946-1949 all 8cyl 508454 | ||
| + | 1950-1954 all 8cyl 512512 | ||
| + | 1955 287 FS 518047 | ||
| + | 1956 317 FS 521602 | ||
| + | 1957 347 FS 530048 | ||
| + | 1958 370 FS 528527 | ||
| + | 1959-1962 389 AS 531369 except Super Duty | ||
| + | 1959-1960 389 SD,FS 533038 Limited production | ||
| + | 1961-1962 389 SD,FS 541649 Limited production | ||
| + | 1961-1963 421 SD,FS 542990 Limited production (approx 2000) | ||
| + | 1961-1962 215 542239 Tempest | ||
| + | 1961-1963 4cyl 1193645 Tempest | ||
| + | 1962-1963 421 AS 9770488 And HO engines | ||
| + | 1963 326 AS 545585 Special Tempest transaxle hub | ||
| + | 1963 389 AS 544191 Pontiac V8 except 421 | ||
| + | 1964-1965 6 cyl 3864465 Tempest; supplied w/o pilot brng | ||
| + | 1964-1965 V8 AS 9773382 Tempest inc. 389 Armasteel "400" | ||
| + | 1964-1965 389 AS 9773383 | ||
| + | 1964-1965 421 977384 And HO; might require different | ||
| + | connecting rod for balance | ||
| + | |||
| + | 1966 421 AS 9773384 1st Type: if using 1965 type | ||
| + | piston, different connecting rods are required | ||
| + | |||
| + | 1966-1967 326 AS 9782770 | ||
| + | 1966 389 N 9783786 | ||
| + | late 1966 421 AS 9783787 | ||
| + | 1966-1967 6 cyl 9782279 Firebird and Tempest; use pilot | ||
| + | bearing P/N 3752487 for MT | ||
| + | |||
| + | 1966-1968 421-428 AS 9783787 2nd type: AS long snout | ||
| + | 1967-1970 400 AS 97954 Except Ram Air, late | ||
| + | 1967-early '68 400 N 9773524 | ||
| + | 1968-1979 400 N 4813 Both "N" crank and standard | ||
| + | w/2-3/4" flange, early | ||
| + | |||
| + | 1968 350 N 9793573 Late | ||
| + | 1968-1970 350 N 9795479 | ||
| + | 1968 400 RA AS 9794054 WU, WY, XT, XW engines | ||
| + | 1968-1969 6 cyl 9790154 Firebird and Tempest; use pilot | ||
| + | bearing P/N 3752487 for MT | ||
| + | |||
| + | Late 1968-1969 428 N 9782769 | ||
| + | 1969 303 FS 546270 Limited production | ||
| + | 1969-1974 400 N 97954 2-3/4" flange | ||
| + | 1969 400 RA IV N 9795481 WH, WW, XN, XP engines, +0.001" | ||
| + | 1970 400 RA IV N 9795481 | ||
| + | 1969 400 RA V FS 545671 Limited production | ||
| + | 1970 366 FS Moldex forged, limited production | ||
| + | 1970-1979 350/400 9773524 Non "N" with 2-3/4" flange | ||
| + | 1970-1976 455 496453 | ||
| + | 1970-1976 455 N 9799103 Approx wt. 72 lbs. came both "N" | ||
| + | and standard | ||
| + | |||
| + | 1971-1974 350 N 4813 | ||
| + | 1971-1974 400 N 4813 | ||
| + | 1972 455 SD FS Kellog forged, limited production | ||
| + | 1973-1974 455 SD N 490164 W8, Y8, X8, Z8, ZJ, XD engines | ||
| + | 1973-1976 455 N 496453 Service replacement | ||
| + | 1975-early '76 350 N 496452 Thin counterweights | ||
| + | 1975-early '76 400 N 496414 Thin counterweights | ||
| + | 1975-1976 455 N 496415 Thin counterweights | ||
| + | 1975-1976 455 N 496453 Thin counterweights, late | ||
| + | 1976-1979 350 N 496452 Thin counterweights, late | ||
| + | 1976-1979 400 N 499864 Thin counterweights | ||
| + | 1977-1981 301 N 525887 End counterweights only | ||
| + | 1980-1981 265 N 525887 End counterweights only | ||
| + | |||
| + | NOTES: | ||
| + | SD: Super Duty | ||
| + | FSD: Forged steel | ||
| + | AS: Armasteel | ||
| + | N:Nodular | ||
| + | RA: Ram Air | ||
| + | MT: Manual transmission | ||
| + | </pre> | ||
===Pilot bearing=== | ===Pilot bearing=== | ||
The Pontiac uses a rolling element-type pilot bearing as opposed to a bushing. | The Pontiac uses a rolling element-type pilot bearing as opposed to a bushing. | ||
| − | [[File:BCA-7109.jpg|thumb|150px|BCA p/n 7109 pilot bearing]]Pilot bearing is BCA p/n 7109 (available from | + | [[File:BCA-7109.jpg|thumb|150px|BCA p/n 7109 pilot bearing]]Pilot bearing is BCA p/n 7109 (available from Summit and Ken's Speed and Machine, among others). The GM part number is 15533265. The dimensions are 1.3780" OD x 0.5906" ID x 0.3543" wide (35 mm OD x 15 mm ID x 9 mm wide). According to Ken's, the cheaper p/n 6202 bearing may be used, but the crank opening may need to be machined 2 mm deeper. The p/n 6202 is 35 mm OD x 15 mm ID x 11 mm wide. The 6202 is available with shields on both sides to keep dirt out. |
The outside of the crank opening is staked with a chisel in at least two places to hold the bearing in place because the pilot bearing is a slip fit into crank recess. | The outside of the crank opening is staked with a chisel in at least two places to hold the bearing in place because the pilot bearing is a slip fit into crank recess. | ||
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