The 2.6-liter Opel Y26SE or LY9 engine was assembled in the UK from 2000 to 2003 and was installed on restyled versions of such popular models as the Vectra B and Omega B. This gasoline engine belongs to the very extensive General Motors 54° V6 engine family.
Y V6 family: Y26SE, Y32SE.
Specifications
| Production years | 2000-2003 |
| Displacement, cc | 2597 |
| Fuel system | distributed injection |
| Power output, hp | 170 – 180 |
| Torque output, Nm | 240 – 250 |
| Cylinder block | cast iron V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 83.2 |
| Piston stroke, mm | 79.6 |
| Compression ratio | 10.0 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 5.75 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Opel Omega 2002) — city — highway — combined |
14.9 8.1 10.6 |
| Engine lifespan, km | ~300 000 |
| Weight, kg | 198 |
The engine was installed on:
- Opel Omega B (V94) in 2000 – 2003;
- Opel Vectra B (J96) in 2000 – 2002.
Disadvantages of the Y26SE engine
- A known weak point of this unit is the constantly leaking heat exchanger.
- Also, a lot of trouble is caused by the unreliable crankcase ventilation system.
- After 250,000 km, the performance of the oil pump decreases, which is dangerous for the engine.
- It is important to monitor the cooling system; if it overheats, it immediately breaks through the cylinder head gaskets.
- The remaining problems are associated with failures of the ignition coils, lambda probes and crankshaft position sensor.
Frequently asked questions about the Opel Y26SE
How much power does the Opel Y26SE make?
The Opel Y26SE develops 170 - 180 hp and 240 - 250 Nm of torque.
How much oil does the Opel Y26SE take and which one?
Engine oil capacity: 5.75 liters. Recommended oil: 5W-40.
Does the Opel Y26SE have a timing belt or chain?
The Opel Y26SE uses a timing belt.
Is the Opel Y26SE turbocharged?
No, the Opel Y26SE is naturally aspirated.
Does the Opel Y26SE need valve clearance adjustment?
No, the Opel Y26SE has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Opel Y26SE last?
The typical lifespan of the Opel Y26SE is ~300 000 km with proper maintenance.
What is the fuel consumption of the Opel Y26SE?
Opel Omega 2002: city 14.9, highway 8.1, combined 10.6 L/100 km.
What cars was the Opel Y26SE installed on?
Opel Omega B (V94) in 2000 - 2003; Opel Vectra B (J96) in 2000 - 2002.
What are the common problems of the Opel Y26SE?
A known weak point of this unit is the constantly leaking heat exchanger. Also, a lot of trouble is caused by the unreliable crankcase ventilation system. All known problems.
What engines are related to the Opel Y26SE?
Y V6 family: Y32SE.
