YEAR ENGINE TYPE CODE COMMENTS 1963 V-6 198 JL V-8 215 JM V-8 215 HP JN V-8 401* 2bbl JR V-8 401* 4bbl JT V-8 425* 4bbl JW 1964 V-6 225 Std.Eng. KH V-6 225 low comp. KJ V-8 300 Std.Eng. KL V-8 300 low comp. KM V-8 300 Std.Eng. KP V-8 300 low comp. (export) KR V-8 401* KT V-8 425* 4bbl KW V-8 425* 2X4bbl KX 1965 V-6 225 LH V-8 300 Std. Eng. LL V-8 300 HP LP V-8 400(401)* GS LR V-8 401* LT V-8 425* 4bbl LW V-8 425* 2X4bbl LX 1966 V-6 225 MH V-8 300 ML V-8 340 low comp. MX V-8 340 2bbl MA V-8 340 4bbl MB V-8 401* GS 400 MR 325hp V-8 401* GS 400 MS 11 to 1 comp. V-8 401* GS 400 MU 356hp V-8 401* MT 340hp V-8 401* low comp. (export) MY 8.75:1 comp. V-8 425* 4bbl MW V-8 425* 2X4bbl MZ Click for more on 425 identification 1967 V-6 225 NH V-8 300 NL V-8 340 2 bbl NA V-8 340 4 bbl NB V-8 400 NR V-8 430 MD V-8 430 ND 1968 L-6 250 3 spd. manual SA L-6 250 2 spd. auto w/o a/c SD L-6 250 2 spd. auto a/c SE V-8 350 2 bbl PO V-8 350 4 bbl PP V-8 400 PR V-8 430 PD 1969 L-6 250 3 spd. manual w/o a/c LA L-6 250 3 spd manual a/c LE L-6 250 ST-300 w/o a/c MA L-6 250 ST-300 a/c ME V-8 350 2 bbl RO V-8 350 4 bbl RP V-8 400 RR V-8 400 Stage 1 RS V-8 430 RD 1970 L-250 3 spd. manual SA L-6 250 THM350 SB V-8 350 2bbl SO V-8 350 4bbl SB V-8 350 4bbl SP V-8 455 4bbl SF V-8 455 4bbl SR V-8 455 4bbl GS Stage 1 SS 1971 L6-250 man. trans. ZB L-250 auto. trans. ZG V-8 350 2bbl LeSabre TC V-8 350 2bbl except LeSabre TO V-8 350 4bbl except LeSabre TB V-8 350 4bbl LeSabre TD V-8 455 4bbl GS TA V-8 455 4bbl TR V-8 455 4bbl GS Stage 1 TS
On models from 1972 through 80, the fifth character of the VIN provides engine identification. This character appears on the dash VIN plate, but not on the engine itself.
YEAR ENGINE TYPE CODE VIN 1972 V-8 350 2bbl WC H V-8 350 4bbl single exhaust WB J V-8 350 4bbl dual exhaust WB K V-8 455 4bbl single exhaust WF T V-8 455 4bbl dual exhaust WF U V-8 455 4bbl, Stage I WS V V-8 455 4bbl WA W Riv GS 1973 L-6 250 auto. trans. CCA D L-6 250 auto. trans. w/ emission ctl. CCB D L-6 250 man. trans. CCC D L-6 250 man. trans. w/emission ctl. CCD D V-8 350 2bbl dual exhaust XC G V-8 350 2bbl single exhaust XC H V-8 350 4bbl single exhaust XB J V-8 350 4bbl dual exhaust XB K V-8 455 4bbl single exhaust XF T V-8 455 4bbl dual exhaust XF U V-8 455 A-body GS Stage I XS V V-8 455 4bbl XA W 1974 L-6 250 man. trans. CCR D L-6 250 auto. trans. w/emission ctl. CCW D L-6 250 auto. trans. CCX D V-8 350 2bbl dual exhaust ZC G V-8 350 2bbl single exhaust ZC H V-8 350 4bbl single exhaust ZB J V-8 350 4bbl dual exhaust ZB K V-8 455 2bbl single exhaust ZF P V-8 455 2bbl dual exhaust ZF R V-8 455 4bbl single exhaust ZF T V-8 455 4bbl dual exhaust ZF U V-8 455 A- Body GS Stage I ZS V V-8 455 4bbl ZA W 1975 L-6 250 man. trans. CJU D V-6 231 AD C L-6 250 auto. trans.,
CJY D L-6 250 auto. trans.,
CJL D V-8 260 exc. Calif.,
QE F V-8 260 exc. Calif.,
QJ F V-8 260 Calif.
TE F V-8 260 Calif
TJ F V-8 350 2bbl. AB H V-8 350 4bbl. AM J V-8 400** YM S V-8 400** YT S V-8 455 AF T
- 231 V6, the engine serial number is on the front of the right cylinder bank
- 260 V8, the engine serial number in on the oil filler tube on the front of the engine.
- 400 V8, the engine serial number is located on the machined face of the cylinder block, below and in front of the right-hand cylinder head.
On most 1975 and later engines, the production code number can be found with the engine serial number.
* Engines which are known as "Nailheads".
Here is some iteresting information about one of the more mysterious motors in our ID tables. There's been no doubt that this is a Pontiac mill. It appears in the 1975 Buick Shop Manual and has its own chapter for service. The rear axle table shows the intended usage was in the LeSabre and the Estate Wagon models.
It is entirely reasonable to see the Pontiac 400 being proposed as a California-only alternative to the 455. Who knows why the Electra 225 and the Riviera would have continued on with just the 455 for that state?
There are serious doubts that such cars were ever built however. There is no mention of a 400 engine in the sales brochure for 75. A Buick parts list from 83 shows no such engine used in 75. This parts list does show California and 49-state applications including 455s for California. There is even a Buick service bulletin regarding tuneups issued in September, 1975 that shows no such engine. The engine table attached to that bulletin shows every other combination under the sun that Buick supplied that year. No 1975 400s have turned up in messages on this site as far as I can remember.
Maybe some Buick engineers tweaked up the 455 to get it to pass California emissions after the shop manual was sent to the printers? Then the plan to install the Poncho motors was scrapped?
To my knowledge there is no data at all on a 76 application for this engine in a Buick. If anyone could guide us to some more resources for further information, it would be most appreciated. (You can post them on the web board.)
There are a few other non-Buick design engines (like the Chevy in-line sixes) that were used in the earlier years. These are not listed as such in the ID tables, mainly due to oversight. But maybe Bob C. can make the needed changes to show them as 'foreign' sourced motors.
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