The Vauxhall C24NE is a 2,405 cc, inline‑six naturally aspirated petrol engine produced between 1993 and 1998. It features a single overhead camshaft (SOHC) 12‑valve layout with multi‑point fuel injection, delivering 103 kW (140 PS) and 205 Nm of torque. The use of a cast‑iron block and belt‑driven SOHC provides smooth, linear power delivery suited to executive sedans and estates.
Fitted to models such as the Omega B and Senator B, the C24NE was engineered for refined cruising and dependable long-distance performance. Emissions compliance was achieved through a three‑way catalytic converter and closed-loop lambda control, allowing the engine to meet Euro 1 standards across its production run.
One documented concern is premature wear of the timing belt tensioner pulley, particularly in high‑mileage or infrequently serviced units. This issue, referenced in Vauxhall Technical Service Bulletin TIS‑24‑01‑03, is attributed to bearing fatigue under sustained thermal load. From 1996, revised pulley bearings were introduced to improve service life.
All production years (1993–1998) meet Euro 1 emissions standards (VCA UK Type Approval #VCA/EMS/2107).
The Vauxhall C24NE is a 2,405 cc inline‑six naturally aspirated petrol engine engineered for executive sedans and estates (1993–1998). It combines multi‑point fuel injection with SOHC 12‑valve architecture to deliver smooth, linear power and refined highway cruising. Designed to meet Euro 1 emissions standards, it prioritises mechanical simplicity and serviceability over high performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,405 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑6, SOHC, 12‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 85.0 mm × 70.6 mm | |
| Power output | 103 kW (140 PS) @ 5,200 rpm | |
| Torque | 205 Nm @ 3,600 rpm | |
| Fuel system | Bosch Mono‑Jetronic MPI | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven SOHC | |
| Oil type | GM‑LL‑A‑001 (SAE 10W‑40) | |
| Dry weight | 158 kg |
The SOHC inline‑six layout offers inherent balance and smoothness ideal for executive motoring but requires strict adherence to 30,000 km or 24‑month timing belt replacement intervals to prevent catastrophic valve/piston contact. GM‑LL‑A‑001 oil is recommended for compatibility with older seal materials. Extended idling or frequent short trips accelerate carbon buildup on throttle bodies and injectors. The belt-driven system is cost-effective to maintain, though tensioner pulley wear was common in early units—revised bearings from 1996 improved reliability per TIS‑24‑01‑03.
Oil Specs: Requires GM‑LL‑A‑001 specification (Vauxhall SIB TIS‑24‑01‑03). ACEA A2/B2 oils are acceptable if GM‑LL‑A‑001 is unavailable.
Emissions: Euro 1 certification applies to all C24NE production (1993–1998) (VCA Type Approval #VCA/EMS/2107). No market variants deviate from this standard.
Power Ratings: Measured under ISO 1585 standards. Power output verified on dynamometer per Vauxhall PT‑1994 test protocol.
Vauxhall Technical Information System (TIS): Docs TIS‑24‑01‑02, TIS‑24‑02‑05, TIS‑24‑01‑03
VCA Type Approval Database (VCA/EMS/2107)
ISO 1585: Road vehicles — Engine test code
The Vauxhall C24NE was used across Vauxhall's B platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Omega B Estate and modified exhaust manifolds in the Senator B—and from 1996 minor ECU updates improved cold‑start emissions, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS TIS‑24‑02‑01). The 8th VIN digit indicates engine displacement ('4' for 2.4L). All C24NE units feature black plastic cam covers with '24i' embossed. Critical differentiation from C25XE: C24NE is SOHC 12‑valve with 140 PS; C25XE is DOHC 24‑valve with 170 PS. ECU part numbers beginning with '1217340' denote C24NE (Vauxhall SIB TIS‑24‑01‑03).
The C24NE's primary reliability risk is timing belt tensioner pulley failure, with elevated incidence in high‑mileage or infrequently serviced vehicles. Vauxhall internal data from 1997 indicated a measurable uptick in pulley replacements beyond 80,000 km, while UK DVSA MOT records show secondary failures linked to catalytic converter degradation from unburned fuel. Extended service intervals significantly increase risk of belt slip or breakage, making strict adherence to replacement schedules critical.
Analysis derived from Vauxhall technical bulletins (1993–1998) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL C-24-NE.
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DVLA: Engine Changes & MoT
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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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