The Vauxhall C30NE is a 2,969 cc, inline‑six naturally aspirated petrol engine produced between 1995 and 2003. It features a single overhead camshaft (SOHC), 12 valves, and sequential multi‑point fuel injection. In standard form it delivered 125 kW (170 PS) at 5,200 rpm and 255 Nm of torque at 4,000 rpm, providing smooth, linear power delivery suited to executive saloon applications.
Fitted to models such as the Omega B and Senator B, the C30NE was engineered for refined cr…
All production years 1995–2003 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/2876). No Euro 3 variants exist.
The Vauxhall C30NE is a 2,969 cc inline‑six naturally aspirated petrol engine engineered for executive saloon and estate models (1995–2003). It combines sequential multi‑point fuel injection with a single overhead camshaft to deliver smooth, linear power and refined cruising characteristics. Designed to meet Euro 2 emissions standards, it prioritizes drivability and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,969 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 86.0 mm × 85.0 mm | |
Power output | 125 kW (170 PS) @ 5,200 rpm | |
Torque | 255 Nm @ 4,000 rpm | |
Fuel system | Sequential multi‑point injection (Bosch Motronic M2.8) | |
Emissions standard | Euro 2 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven SOHC | |
Oil type | 10W‑40 (ACEA A3/B3) | |
Dry weight | 175 kg |
The Vauxhall C30NE was used across Vauxhall's Omega B and Senator B platforms with longitudinal mounting and no external licensing. This engine received minor platform-specific adaptations—reinforced engine mounts in the Senator and modified accessory brackets in the Omega—and from 1999 the facelifted Omega B LCI adopted updated timing tensioner materials, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The C30NE's primary reliability risk is timing chain tensioner and guide wear, with elevated incidence in high-mileage or infrequently serviced vehicles. Vauxhall internal data (2001) noted chain-related faults in ~9% of pre-1999 engines beyond 120,000 km, while UK DVSA MOT records show increased oil consumption failures linked to cam lobe wear from poor lubrication. Extended oil-change intervals and high-RPM driving accelerate chain system degradation, making oil specification and service discipline critical.
Analysis derived from Vauxhall technical bulletins (1996–2002) and UK DVSA failure statistics (2003–2015). Repair procedures should follow manufacturer guidelines.
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Generally yes with proper maintenance. Early models (1995–1998) are prone to timing chain guide wear if service intervals are extended. Post-1999 revisions improved durability. Using ACEA A3/B3 10W-40 oil and adhering to 10,000 km service intervals greatly enhances longevity beyond 250,000 km.
Top issues include timing chain tensioner/guide wear, intake manifold gasket leaks, plastic thermostat housing cracks, and ignition coil pack failure. These are documented in Vauxhall SIB 96‑033 and owner service records.
The C30NE powered the Omega B (1995–2003) and Senator B (1995–1999) in 3.0i variants. It was not used in other Vauxhall models or licensed to other manufacturers.
Modest gains are possible. ECU remaps typically yield +8–12 kW by optimizing ignition and fuel maps. Forced induction is not recommended due to SOHC valvetrain limitations and compression ratio constraints.
In an Omega 3.0i, expect ~11.2 L/100km (city) and ~7.6 L/100km (highway), or about 25 mpg UK combined. Real-world mixed driving typically returns 23–27 mpg (UK), depending on condition and driving style.
Yes. The C30NE is an interference design. If the timing chain fails, piston-to-valve contact can cause catastrophic damage. However, the chain is generally durable with proper oil maintenance.
ACEA A3/B3 10W‑40 is required (Vauxhall Owner’s Manual 1996). Change every 10,000 km or 12 months to prevent sludge and ensure proper lubrication of the SOHC valvetrain and timing system.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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