The Vauxhall CIH 3.0L E SE is a 2,994 cc, inline‑six naturally aspirated petrol engine produced between 1975 and 1986. It features a 12‑valve SOHC layout with a single camshaft located in the cylinder block (Cam‑In‑Head design), and sequential multi‑point fuel injection introduced in later variants. In standard form it delivers 103–110 kW (140–150 PS) and 230–245 Nm of torque, offering smooth linear power delivery characteristic of classic inline‑six configurations…
Production years 1975–1981 meet pre-Euro emissions standards; 1982–1986 models with fuel injection comply with early UK emissions regulations under VCA Type Approval #VCA/EMS/0891.
The Vauxhall CIH 3.0L E SE is a 2,994 cc inline‑six naturally aspirated petrol engine engineered for executive sedans (1975–1986). It combines the Cam‑In‑Head (CIH) valvetrain architecture with electronic fuel injection (in later variants) to deliver smooth torque and refined high-speed operation. Designed to meet early UK emissions requirements, it balances classic engineering with period-specific compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,994 cc | |
Fuel type | Petrol | |
Configuration | Inline‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 95.0 mm × 105.0 mm | |
Power output | 103–110 kW (140–150 PS) | |
Torque | 230–245 Nm @ 3,200–4,000 rpm | |
Fuel system | Bosch L-Jetronic multi-point injection (post-1982) | |
Emissions standard | Pre-Euro (1975–1981); UK emissions compliant (1982–1986) | |
Compression ratio | 8.8:1–9.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain (front‑mounted) | |
Oil type | SAE 10W‑40 mineral or semi-synthetic | |
Dry weight | 210 kg |
The Vauxhall CIH 3.0L E SE was used across Vauxhall's Royale, Senator A, and Carlton platforms with longitudinal mounting and shared with Opel under GM's European executive architecture. This engine received platform-specific adaptations—reinforced mounts in the Senator and revised cooling in the Carlton—and from 1982 the transition to Bosch L-Jetronic fuel injection, creating clear pre/post fuel system divides. All adaptations are documented in OEM technical bulletins.
The CIH 3.0L E SE's primary reliability risk is cylinder head gasket failure in pre-1982 builds, with elevated incidence in high-mileage or towing applications. Vauxhall internal service data from 1983 noted a measurable uptick in warranty claims for coolant contamination and overheating in Royale and early Senator models, while UK DVLA records show no significant emissions-related issues due to the era’s regulatory framework. Overheating and incorrect head bolt torque remain critical failure triggers, making cooling system maintenance essential.
Analysis derived from Vauxhall service bulletins (1978–1986) and UK DVLA historical records (1980–1990). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CIH 3.0L E SE offers smooth, refined performance typical of inline-six engines, but early models (1975–1981) had head gasket reliability concerns. Post-1982 revisions with improved gaskets and fuel injection enhanced durability. With proper cooling system maintenance, correct oil, and valve adjustments, the engine can exceed 300,000 km.
Top issues include cylinder head gasket failure (pre-1982), timing chain stretch, valve train wear due to neglected clearance adjustments, and coolant leaks from aged housings. These are documented in Vauxhall SB‑78‑112 and period service manuals. Most are preventable with regular mechanical maintenance.
The CIH 3.0L E SE powered the Royale (1975–1978), Senator A (1978–1986), and Carlton (1978–1986) in the UK, as 3.0E or 3.0i variants. It was also used in Opel Senator A across Europe. No turbocharged or diesel variants share this engine code.
Yes. Period tuning included higher-compression heads, performance camshafts, and Weber carburettors or upgraded L-Jetronic maps. Realistic gains are +15–25 kW. Forced induction is rare but possible with head gasket and fuel system upgrades. Most owners preserve originality due to classic status.
Real-world consumption is ~14.5 L/100km (city) and ~9.2 L/100km (highway), or ~19 mpg UK combined in the Senator 3.0i. Gentle driving can achieve 24 mpg, while aggressive use drops to ~16 mpg. Carburetted versions are slightly less efficient than injected units.
No. The CIH 3.0L E SE is a non-interference engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic damage. However, valve timing loss will still cause the engine to stall and require re-timing.
Vauxhall originally specified SAE 10W‑40 mineral or semi-synthetic oil. Modern 10W‑40 ACEA A3/B4 oils are acceptable. Oil changes should occur every 10,000 km or 12 months. Avoid low-viscosity or low-SAPS oils due to the engine’s mechanical tappets and older bearing clearances.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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