Oldsmobile Diesel engine
|Piston stroke||3.385 in (86.0 mm)|
|Block material||Cast iron|
|Head material||Cast iron|
|Valvetrain||Overhead valve 2 valves x cyl.|
|Compression ratio||22.5:1, 21.6:1|
|Fuel system||Indirect injection|
|Oil system||Wet sump|
|Power output||85–120 bhp (63–89 kW)|
|Torque output||160–220 lb⋅ft (217–298 N⋅m)|
|Successor||Detroit Diesel V8 engine|
Oldsmobile produced three versions of a diesel engine between 1978 to 1985: a 350 cu in (5.7 L) V8 in 1978-85, a 263 cu in (4.3 L) V8 in 1979, and a 261 cu in (4.3 L) V6 1982-1985. The engines powered front and rear-wheel drive vehicles; the 4.3-litre V6 was adapted to both transverse and inline front-wheel drive applications. Sales peaked in 1981 at approximately 310,000 units, which represented 60% of the total U.S. passenger vehicle diesel market. However, this success was short-lived due to a decline in gas prices as well as fuel quality issues including large volumes of diesel fuel containing water or foreign particles.
The LF9 is a 350 cu in (5.7 L) diesel V8 produced from 1978 to 1985. Earlier versions and those used in pickups (1978-1981) produced 120 hp (89 kW) and 220 lb⋅ft (298 N⋅m) torque, while later versions produced 105 hp (78 kW) and 205 lb⋅ft (278 N⋅m) torque.
- Buick – varying model years of Century, Electra, LeSabre, Regal, and Riviera
- Cadillac – varying model years of de Ville, Eldorado, Fleetwood Brougham, and Seville
- Chevrolet – varying model years of C10, Caprice, El Camino, Impala, Malibu, Monte Carlo, and Suburban
- GMC – varying model years of C1500, Caballero, and Suburban
- Oldsmobile – varying model years of Custom Cruiser, Cutlass/Cutlass Cruiser/Cutlass Salon, Cutlass Supreme/Cutlass Calais, Delta 88, Ninety-Eight, and Toronado
- Pontiac – varying model years of Bonneville, Catalina, Grand Prix, and Parisienne
- 1980–1982 Checker Marathon
The LF7 is a 260 cu in (4.3 L) V8 putting out 90 hp (67 kW) and 160 lb⋅ft (217 N⋅m) torque.
The LT6 is 4.3-liter V6 produced from 1982 to 1984 and installed in rear-wheel drive vehicles. Power was rated at 85 bhp (63 kW) at 3600 rpm and 165 lb⋅ft (224 N⋅m) at 1600 rpm. Applications:
- 1982–1984 Buick Regal
- 1982–1983 Chevrolet Malibu
- 1982–1983 Chevrolet Monte Carlo
- 1982–1984 Oldsmobile Cutlass Supreme/Cutlass Calais
The LT7 is a transversely-mounted version of the 4.3-liter V6 produced from 1982 to 1985. Power was rated at 85 bhp (63 kW) at 3600 rpm and 165 lb⋅ft (224 N⋅m) at 1600 rpm.
- 1982–1985 Buick Century
- 1982–1985 Chevrolet Celebrity
- 1982–1985 Oldsmobile Cutlass Ciera
- 1982–1985 Pontiac 6000
The LS2 4.3-liter V6 produced only in 1985 and installed in front wheel drive vehicles.
- "Oldsmobile Diesel Technical Magazine". Retrieved 20 Dec 2013.
- "The Worst Automobile Engines of All Time - Features- Popular Hot Rodding Magazine". Retrieved 26 Jan 2016.
- "What's Hot". Retrieved 11 Jan 2014.
- "TECHNICAL: DIESEL REDUX". Retrieved 11 Jan 2014.
- "Ghosts of Diesels Past: Failed cars from 20 years ago still haunt GM, U.S. market - Autoweek". Retrieved 11 Jan 2014.