The 3.6-liter V6 General Motors LY7 engine was assembled at the concern’s factory from 2003 to 2012 and was installed on the Cadillac STS, GMC Acadia, Chevrolet Malibu or Suzuki XL-7 under the N36A index. On the Holden model, a simplified modification of the LE0 was installed with phase regulators only at the intake.
High Feature family: L3B, LP9, LF1, LFX, LFY, LGX, LLT, LY7.
Specifications
| Production years | 2003-2012 |
| Displacement, cc | 3564 |
| Fuel system | direct injection |
| Power output, hp | 240 – 275 |
| Torque output, Nm | 305 – 345 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 94 |
| Piston stroke, mm | 85.6 |
| Compression ratio | 10.2 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | Dual VVT |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.7 |
| Fuel type | petrol |
| Euro standards | EURO 4 |
| Fuel consumption, L/100 km (for Cadillac STS 2005) — city — highway — combined |
17.7 9.4 12.4 |
| Engine lifespan, km | ~280 000 |
| Weight, kg | 185 |
The engine was installed on:
- Buick Enclave 1 (GMT967) in 2007 – 2008;
- Buick LaCrosse 1 (GMX365) in 2004 – 2008;
- Buick Rendezvous 1 (GMT257) in 2004 – 2007;
- Cadillac CTS I (GMX320) in 2004 – 2007, CTS II (GMX322) in 2007 – 2009;
- Cadillac SRX I (GMT265) in 2003 – 2010;
- Cadillac STS I (GMX295) in 2004 – 2007;
- Chevrolet Equinox 1 (GMT191) in 2007 – 2009;
- Chevrolet Malibu 7 (GMX386) in 2007 – 2012;
- GMC Acadia 1 (GMT968) in 2006 – 2008;
- Pontiac G6 1 (GMX381) in 2007 – 2009;
- Pontiac G8 1 (GMX557) in 2007 – 2009;
- Pontiac Torrent 1 (GMT191) in 2007 – 2009;
- Saturn Aura 1 (GMX354) in 2006 – 2009;
- Saturn Outlook 1 (GMT966) in 2006 – 2008;
- Saturn Vue 2 (GMT319) in 2007 – 2009;
- Suzuki XL-7 2 (GMT193) in 2006 – 2009.
Disadvantages of the GM LY7 engine
- The main problem of this power unit is considered to be a low resource of timing chains;
- They can stretch up to 100,000 km, and replacing them is quite complicated and expensive;
- When replacing chains, it is easy to ruin the front cover, but it is very expensive;
- The motors of this series are very afraid of overheating, and the radiators, as luck would have it, leak regularly;
- Weaknesses also include a short-lived pump and a capricious control unit.
Frequently asked questions about the GM LY7
How much power does the GM LY7 make?
The GM LY7 develops 240 - 275 hp and 305 - 345 Nm of torque.
How much oil does the GM LY7 take and which one?
Engine oil capacity: 5.7 liters. Recommended oil: 5W-30.
Does the GM LY7 have a timing belt or chain?
The GM LY7 uses a timing chain.
Is the GM LY7 turbocharged?
No, the GM LY7 is naturally aspirated.
Does the GM LY7 need valve clearance adjustment?
No, the GM LY7 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the GM LY7 last?
The typical lifespan of the GM LY7 is ~280 000 km with proper maintenance.
What is the fuel consumption of the GM LY7?
Cadillac STS 2005: city 17.7, highway 9.4, combined 12.4 L/100 km.
What cars was the GM LY7 installed on?
Buick Enclave 1 (GMT967) in 2007 - 2008; Buick LaCrosse 1 (GMX365) in 2004 - 2008; Buick Rendezvous 1 (GMT257) in 2004 - 2007; Cadillac CTS I (GMX320) in 2004 - 2007, CTS II (GMX322) in 2007 - 2009; Cadillac SRX I (GMT265) in 2003 - 2010; Cadillac STS I (GMX295) in 2004 - 2007 and 10 more (see the full list above).
What are the common problems of the GM LY7?
The main problem of this power unit is considered to be a low resource of timing chains. They can stretch up to 100,000 km, and replacing them is quite complicated and expensive. All known problems.
