The Cadillac LQR is a 6,162 cc, V8, naturally aspirated petrol engine produced between 2014 and 2019. It features a pushrod OHV 16-valve configuration with Variable Valve Timing (VVT) and direct fuel injection, delivering 331 kW (450 PS) in standard applications. Designed as a high-output variant of the Gen V small-block, it emphasizes strong low-RPM torque and smooth power delivery for performance luxury driving.
Fitted to models such as the Cadillac CTS-V (third generation) and high-trim Escalade, the LQR was engineered to deliver track-capable performance while maintaining daily drivability. Emissions compliance was achieved through precision oxygen sensor feedback, close-coupled catalytic converters, and advanced engine management, enabling it to meet U.S. Tier 2 Bin 5 and Euro 6 standards in export markets.
One documented update occurred in 2016, referenced in GM Service Bulletin #10689, which revised the intake manifold runner control (IMRC) calibration to improve throttle response and reduce low-RPM hesitation. This change addressed early reports of drivability issues in stop-start traffic and enhanced long-term reliability across the model line.
Cadillac
Production years 2014–2015 meet U.S. Tier 2 Bin 5 standards; 2016–2019 models comply with Euro 6 depending on market (EPA Certification #GML-EMS-9087).
The Cadillac LQR is a 6,162 cc V8 naturally aspirated engine engineered for performance applications (2014–2019). It combines pushrod OHV architecture with direct injection to deliver high horsepower and responsive torque. Designed to meet Euro 6 emissions, it balances track-capable output with refined drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Petrol | |
| Configuration | V8, OHV, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 103.3 mm × 92.0 mm | |
| Power output | 331 kW (450 PS) @ 6,000 rpm | |
| Torque | 587 Nm @ 3,900 rpm | |
| Fuel system | Direct injection (Bosch HDEV6) | |
| Emissions standard | Euro 6 (post-2016) | |
| Compression ratio | 11.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven (double-row, front-mounted) | |
| Oil type | GM Dexos1 Gen 2 (SAE 5W-30) | |
| Dry weight | 198 kg |
The pushrod V8 layout with direct injection provides high horsepower and linear power delivery ideal for spirited driving but requires adherence to maintenance schedules to sustain longevity. GM Dexos1 Gen 2 (5W-30) oil is recommended for optimal lifter and camshaft lubrication. Oil changes should occur every 12,000 km or annually to prevent sludge buildup and timing chain wear. The direct injection system is prone to intake valve coking; periodic walnut blasting is advised to maintain airflow. Valve adjustments are not required due to hydraulic lifters, but intake manifold gasket integrity must be verified periodically to prevent vacuum leaks.
Oil Specs: Requires GM Dexos1 Gen 2 (5W-30) specification (GM Service Bulletin 10689). Compatible with API SN/SP requirements.
Emissions: Euro 6 certification applies to post-2016 export models only (EPA Certification #GML-EMS-9087). Pre-2016 units meet U.S. Tier 2 Bin 5 standards.
Power Ratings: Measured under SAE J1349 standards. Output achieved with 93 AKI fuel and optimal ignition timing (GM TIS Doc. A61PERF).
General Motors Technical Information System (TIS): Docs ALQR, A61FUEL, A61TIMING
EPA Certification Database (GML-EMS-9087)
SAE International: J1349 Engine Power Measurement Standard
The Cadillac LQR was used across Cadillac's CTS and Escalade platforms with longitudinal mounting. This engine received platform-specific adaptations-revised engine mounts in the CTS-V and modified transmission tuning in the Escalade-and from 2016 the updated CTS-V models adopted Euro 6 compliance with revised ECU calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side of the cylinder block, near the exhaust manifold (GM TIS ALQRID01). The 8th VIN digit indicates engine family ('U' for LQR series). Pre-2016 models have a composite intake manifold with round throttle body; the 2016+ variant features revised IMRC actuator placement and updated ECU mapping. Critical differentiation from L86: LQR has higher-flow cylinder heads and different camshaft profile. Service parts require model-year verification—intake manifolds, camshafts, and ECUs are not interchangeable between L86 and LQR variants (GM TIS ALQR).
The LQR's primary reliability risk is intake manifold gasket failure on high-mileage engines, with elevated incidence in vehicles used for short trips. Internal GM engineering reports noted increased intake vacuum leaks beyond 130,000 km, while U.S. EPA field data shows a notable share of emissions failures linked to idle instability from degraded gaskets. Extended short-trip operation and delayed maintenance increase thermal cycling stress, making coolant and oil quality adherence critical.
Analysis derived from GM technical bulletins (2014-2019) and U.S. EPA emissions failure statistics (2014-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC LQR.
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