The CADILLAC LF3 is a 3,564 cc, V6 naturally aspirated petrol engine produced between 2014 and 2020. It features DOHC, 24 — valve configuration and General Motors' High Feature V6 architecture, delivering 235 kW (320 PS) and 367 Nm of torque. Its compact design and aluminum block construction provide smooth power delivery and weight efficiency in luxury applications.
Fitted to the CTS and ATS, the LF3 was engineered for refined cruising and balanced performance in Cadill…
All production years 2014–2020 meet OBD-II and Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/6780).
The CADILLAC LF3 is a 3,564 cc V6 naturally aspirated petrol engine engineered for mid-size luxury sedan applications (2014–2020). It combines aluminum construction with dual overhead camshafts to deliver smooth power delivery and quiet operation. Designed to meet OBD-II and Euro 6 standards, it balances refinement with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,564 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 85.0 mm | |
Power output | 235 kW (320 PS) @ 6,800 rpm | |
Torque | 367 Nm @ 4,500 rpm | |
Fuel system | Bosch direct injection (up to 150 bar) | |
Emissions standard | OBD-II, Euro 6 | |
Compression ratio | 11.3:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row timing chain | |
Oil type | GM dexos1 Gen 2 (SAE 5W-30) | |
Dry weight | 189 kg |
The CADILLAC LF3 was used across CADILLAC's ATS and CTS platforms with longitudinal mounting. This engine received platform-specific adaptations-integrated oil cooler in the CTS-V and revised intake manifolds in the ATS-V-and from 2020 the CTS LCI adopted the LF4 turbocharged variant with updated engine management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The LF3's primary reliability risk is intake manifold carbon buildup on pre-2017 builds, with elevated incidence in mixed driving conditions. Internal GM reports from 2016 indicated a significant number of pre-upgrade engines requiring intake cleaning before 120,000 km, while UK DVSA records show drivability-related failures were common in neglected examples. Extended idling and aggressive driving increase thermal stress, making cooling system maintenance and use of correct oil critical.
Analysis derived from GM technical bulletins (2014–2020) and UK DVSA failure statistics (2021–2024). 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 LF3 offers smooth performance and solid engineering, but pre-2017 models with original CCV systems are prone to carbon buildup. Later revisions with upgraded oil separation significantly improve durability. Regular oil changes, use of correct oil (5W-30 GM dexos1), and prompt attention to idle quality are essential for reliability.
Key issues include intake manifold carbon buildup (especially pre-2017), cooling system failures (thermostat, water pump), camshaft/lifter wear, and oil leaks from valve cover and rear main seal. These are documented in GM service bulletins and require OEM-specified parts for proper repair.
The LF3 was used in the ATS (2014–2020) and CTS (2014–2019). It was replaced by the LF4 in 2020 with twin-turbocharging and updated engine management. No cross-manufacturer applications are documented for this variant.
Yes, though naturally aspirated. Stage 1 tuning includes ECU remap, high-flow intake, and performance exhaust, gaining ~15–25 kW. Cylinder head porting and camshaft upgrades offer further gains. Reliability depends on maintaining cooling and oil systems, especially with increased thermal load.
In an ATS, combined consumption is ~10.5 L/100km (27 mpg UK). City driving may see 12–14 L/100km (24–20 mpg), while highway cruising can achieve ~8.0 L/100km (35 mpg). Real-world figures depend on driving style and vehicle condition.
Yes. The LF3 series is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing catastrophic internal damage. Chain maintenance and tensioner inspection are critical, especially given the engine's high-RPM operation.
GM specifies 5W-30 synthetic oil meeting dexos1 Gen 2 spec. Change intervals should not exceed 15,000 km. Proper oil ensures adequate protection for camshafts, lifters, and the timing chain, especially under sustained high-RPM use.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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