The Cadillac CE1 is a 2,997 cc, V6 petrol engine produced between 2003 and 2007. It features a DOHC 24-valve configuration with sequential multi-point fuel injection (SFI) and chain-driven camshafts. In standard tune, it delivers 170 kW (231 PS), providing balanced performance for mid-size luxury sedans and crossovers.
Fitted primarily to the Cadillac CTS and SRX platforms, the CE1 was engineered for responsive driving dynamics and smooth refinement. Emissions compliance was achieved through dual three-way catalytic converters and closed-loop lambda control, enabling Euro 3 certification across its production run—meeting European emissions standards of the early 2000s.
One documented reliability concern is intake manifold gasket degradation due to thermal cycling, highlighted in General Motors Service Bulletin 05-06-01-014. Early silicone-based gaskets were susceptible to hardening and cracking. From 2005, revised composite gaskets and updated torque specifications were introduced to improve sealing integrity and reduce vacuum leak incidence.
Cadillac
Production years 2003–2007 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5577).
The Cadillac CE1 – Petrol is a 2,997 cc V6 naturally aspirated engine designed for Cadillac's mid-size luxury models (2003–2007). It combines DOHC architecture with sequential SFI to deliver linear power and strong mid-range torque. Designed to meet Euro 3 emissions standards, it balances performance with long-term serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,997 cc | |
| Fuel type | Petrol (Unleaded, 95 RON) | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 80.6 mm | |
| Power output | 170 kW (231 PS) @ 6,000 rpm | |
| Torque | 292 Nm @ 4,800 rpm | |
| Fuel system | Sequential multi-point fuel injection (SFI) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven (long-life, non-serviceable) | |
| Oil type | GM Dexos1 5W-30 | |
| Dry weight | 188 kg |
The DOHC 24-valve design provides smooth power delivery ideal for highway cruising but requires strict adherence to 15,000 km or annual oil changes to maintain chain and tappet longevity. GM Dexos1 5W-30 oil is critical due to its thermal stability under high-load conditions. Fuel quality should meet minimum 95 RON standards to prevent knock under load. Pre-2005 models benefit from the intake manifold gasket upgrade per GM Service Bulletin 05-06-01-014 to reduce vacuum leak risk. Spark plug replacement at 60,000 km intervals helps maintain idle stability and emissions compliance.
Oil Specs: Requires GM Dexos1 5W-30 specification (GM Service Bulletin 05-06-01-014). Supersedes API SM.
Emissions: Euro 3 certification applies to all models (2003–2007) (VCA Type Approval #VCA/EMS/5577).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel grades meeting 95 RON minimum (GM TIS A30000).
General Motors Technical Information System (TIS): Docs A30000, A30150, SB 05-06-01-014
VCA Type Approval Database (VCA/EMS/5577)
SAE International: J1349 Engine Power Measurement
The Cadillac CE1 – Petrol was used across Cadillac's CTS and SRX platforms with longitudinal mounting and front-wheel or all-wheel drive layout. This engine received platform-specific adaptations-reinforced engine mounts in the SRX and revised intake runners in the CTS-and from 2005 the facelifted CTS V-series adopted updated ECU calibrations for improved throttle response, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right side of the cylinder block near the exhaust manifold (GM TIS A30045). The 8th VIN digit indicates engine type ('L' for 3.0L V6). Pre-2005 models have ribbed black intake manifolds; post-2005 units use smooth-surface manifolds with revised gaskets. Critical differentiation from higher-output variants: The CE1 lacks the performance camshafts and larger throttle body of the 3.6L V6. Service parts require model year verification—intake gaskets for pre-2005 engines are incompatible with later models due to material redesign per GM Service Bulletin 05-06-01-014.
The CE1 – Petrol's primary reliability risk is vacuum leaks from intake manifold gaskets on neglected units, with elevated incidence in high-mileage examples. Internal GM quality reports from 2006 indicated a significant number of pre-2005 engines suffering gasket-related performance issues beyond 80,000 km, while UK DVSA MOT records show a notable rate of emissions test failures linked to aging oxygen sensors. Extended service intervals and short-trip driving increase thermal stress on the intake system, making adherence to maintenance schedules critical.
Analysis derived from GM technical bulletins (2003-2007) and UK DVSA failure statistics (2005-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC CE1.
Comprehensive technical documentation and regulatory references
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CADILLAC 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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