The 3.8-liter compressor V6 engine GM L67 was produced in Michigan from 1990 to 2005 and was installed on charged versions of the Buick Park Avenue, Pontiac Bonneville or Chevrolet Monte Carlo. There are two versions of the unit: Series I with a power of 205 – 225 hp and Series II with a power of 240 hp.
Buick V6 family: L32, L36, L67.
Specifications
| Production years | 1990 – 2005 |
| Displacement, cc | 3791 |
| Fuel system | distributed injection |
| Power output, hp | 205 – 225 (Series I, 1990 – 1995) 240 (Series II, 1995 – 2005) |
| Torque output, Nm | 353 – 373 (Series I, 1990 – 1995) 380 (Series II, 1995 – 2005) |
| Cylinder block | cast iron V6 |
| Block head | cast iron 12v |
| Cylinder bore, mm | 97 |
| Piston stroke, mm | 86 |
| Compression ratio | 8.0 (Series I, 1990 – 1995) 8.5 (Series II, 1995 – 2005) |
| Features | OHV |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | Eaton M62 (Series I, 1990 – 1995) Eaton M90 (Series II, 1995 – 2005) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | petrol |
| Euro standards | EURO 1 (Series I, 1990 – 1995) EURO 2/3 (Series II, 1995 – 2005) |
| Fuel consumption, L/100 km (for Buick Park Avenue 2000) — city — highway — combined |
12.4 8.4 10.7 |
| Engine lifespan, km | ~250 000 |
| Weight, kg | 204 |
The engine was installed on:
- Buick Park Avenue 1 (C-body) in 1990 – 1996, Park Avenue 2 (G-body) in 1996 – 2005;
- Buick Regal 4 (W-body) in 1997 – 2004;
- Buick Riviera 8 (G-body) in 1995 – 1998;
- Chevrolet Impala 8 (GMX210) in 2003 – 2004;
- Chevrolet Monte Carlo 6 (GMX230) in 2003 – 2004;
- Oldsmobile 88 X (H-body) in 1995 – 1999;
- Oldsmobile 98 XII (C-Body) in 1991 – 1995;
- Pontiac Bonneville 9 (H-body) in 1991 – 1999, Bonneville 10 (GMX310) in 1999 – 2003;
- Pontiac Grand Prix 7 (W-body) in 1996 – 2003.
Disadvantages of the GM L67 engine
- First of all, we note that there are two generations of these engines, Series I and Series II.
- First generation motors are known for the low life of compressor bearings.
- Other weak points here include valve stem seals and balancer bearings.
- The 2nd generation engines received an extremely unsuccessful plastic intake manifold.
- The gasket under this manifold often leaks and the antifreeze mixes with the oil.
- Also, units of both generations are afraid of overheating, even to the point of cracking the heads.
Frequently asked questions about the GM L67
How much power does the GM L67 make?
Power output of the GM L67, hp: 205 - 225 (Series I, 1990 - 1995); 240 (Series II, 1995 - 2005). Torque, Nm: 353 - 373 (Series I, 1990 - 1995); 380 (Series II, 1995 - 2005).
How much oil does the GM L67 take and which one?
Engine oil capacity: 4.3 liters. Recommended oil: 5W-30.
Does the GM L67 have a timing belt or chain?
The GM L67 uses a timing chain.
Is the GM L67 turbocharged?
Yes, the GM L67 is turbocharged (Eaton M62 (Series I, 1990 - 1995); Eaton M90 (Series II, 1995 - 2005)).
Does the GM L67 need valve clearance adjustment?
No, the GM L67 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the GM L67 last?
The typical lifespan of the GM L67 is ~250 000 km with proper maintenance.
What is the fuel consumption of the GM L67?
Buick Park Avenue 2000: city 12.4, highway 8.4, combined 10.7 L/100 km.
What cars was the GM L67 installed on?
Buick Park Avenue 1 (C-body) in 1990 - 1996, Park Avenue 2 (G-body) in 1996 - 2005; Buick Regal 4 (W-body) in 1997 - 2004; Buick Riviera 8 (G-body) in 1995 - 1998; Chevrolet Impala 8 (GMX210) in 2003 - 2004; Chevrolet Monte Carlo 6 (GMX230) in 2003 - 2004; Oldsmobile 88 X (H-body) in 1995 - 1999 and 3 more (see the full list above).
What are the common problems of the GM L67?
First of all, we note that there are two generations of these engines, Series I and Series II. First generation motors are known for the low life of compressor bearings. All known problems.
