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Buick 252 (4.1L) Engines

In response to rising gas prices, a larger 252 cu in (4.1 L) version of the 3.8 L LD5 V6 was produced from 1980 through 1984 and marketed as an alternative to a V8. including Cadillac which offered the "big" Buick V6 in several models from 1980 to 1982 as a credit option to the troublesome V8-6-4 engine used in 1981 and early versions of the aluminum-block Cadillac HT-4100 V8 introduced in 1982.

It was also the standard powerplant in the front-drive Riviera and Olds Toronado from 1981 to 1984.


Displ. Type Opt. Code VIN Code Bore (in.) Stroke (in.) Aspiration Fuel Del. Comp.Ratio Torque / RPM H.P. / RPM
252ci/4.1L V6 LC4 4 3.965 3.4000 Norm Carb 8.0:1 205/2000 125/4000
**V6 Cylinder and distributer diagram**

Firing Order 1-6-5-4-3-2

Distributor Rotation is Clockwise

Maintenance Items

Engine Timing Comp PSI Idle Spd. S plug/Gap*
231ci/3.8L 15o BTDC1,2 100min 20% var 650 in Dr. RS-46SZ/.060 A329C