GM 54-Degree V6 engine
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| 54° V6 | |
|---|---|
| Manufacturer | General Motors |
| Also called | Ellesmere V6 |
| Production | 1994–2004 |
| Predecessor | Opel Straight-6 |
| Successor | High Feature V6 |
| Class | DOHC 54° 24-valve V6 |
| Engine | 2.5 L (2498 cc/152 in³) 3.0 L (2962 cc/180 in³) 3.2 L (3175 cc/193 in³) |
| Similar | Chrysler LH V6 Mazda K engine Nissan VQ engine Nissan VE engine Suzuki H engine Toyota VZ engine |
General Motors' Opel division in Europe designed a compact V6 engine with an odd 54° vee angle. It was an iron block/aluminum head DOHC design with 4 valves per cylinder. All 54° engines are assembled at Ellesmere Port in England.
This engine was used in the American versions of these models as well. The engine was reworked substantially between the 3.0 L L81 and 3.2 L LA3, but the bore centers and deck height were retained. In its 3.0 L form, this engine has a notable history for recalls of all units installed in U.S. Cadillac Cateras due to problems with timing belt tensioner bearing failures, which could cause catatrophic damage to the engine with its interference design.
[edit] L81
The L81 was used longitudinally in the Opel Omega, Cadillac Catera and transversely in the Saturn L-Series and Saab 9000. Bore and stroke were 86 mm (3.38 in) × 85 mm (3.35 in), for 2962 cc (180.75 in³) displacement. with 10:1 compression, the engine produced up to 210 hp (155 kW) and (270 N·m).
Saab's turbocharged version for Saab 9-5 (the X30) produced 200 hp (149 kW) at 5000 RPM and 229 ft·lbff (310 N·m) at 2500-4000 RPM. Saab equipped the engine with special version of Saab Direct Ignition.
This engine was used in:
- 1994 Opel Omega
- 1997-2001 Cadillac Catera
- 2000 Saturn L-Series
- 2002 Saturn VUE
- Saab 9-5
- Saab 9000
[edit] 2.5
Saab used a 2.5 L version of this engine in the Saab 900 (NG) from 1994 and Opel used it in many different models. It produced 170 hp and 167 ft·lbff.
This engine was used in:
- Opel Vectra A
- Opel Vectra B
- Opel Calibra
- Opel Omega B
- Saab 900 NG
[edit] LA3
The 3.2 L LA3 is a complete redesign of the L81 for the Cadillac CTS and Opel Omega B. It had an iron block and used aluminum DOHC heads with fixed (non-variable) valve timing, and a variable intake. The bore was 87.5 mm and it had an 88 mm stroke. This was a 3175cc (194 in³) engine and produced 220 hp (164.1 kW) and 218 ft·lbff (296 N·m). Production started in July of 2001, but the engine was replaced by the new GM High Feature engine starting in 2004.
This engine was used in:
- 2003-2004 Cadillac CTS
- Opel Omega B
