The Cadillac LLV is a 6,162 cc, V8 naturally aspirated petrol engine produced from 2021 onwards. It features dual overhead camshafts (DOHC), 32-valve configuration, and General Motors' Dynamic Fuel Management (DFM) system with continuously variable valve timing. In standard tune, it delivers 335 kW (456 PS) at 6,000 rpm and 624 Nm of torque at 3,900 rpm, offering high-output performance and refinement for full-size luxury applications.
Fitted to models including the CT6-V and select high-performance variants, the LLV was engineered for smooth yet responsive power delivery and elevated driving dynamics. Emissions compliance is achieved through close-coupled three-way catalytic converters and closed-loop lambda control, meeting Euro 6d standards across its production run.
One documented reliability concern is premature Active Fuel Management (AFM) lifter failure, which could lead to oil consumption, lifter tapping, or engine misfires. This issue, highlighted in General Motors Service Information Bulletin 21-06-01-005, is attributed to inadequate oil pressure and wear in the AFM oil control solenoid. In 2023, GM introduced a revised lifter design with improved internal geometry and recalibrated DFM logic to reduce stress.
Cadillac
Production years 2021–present meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/4013).
The Cadillac LLV is a 6,162 cc V8 naturally aspirated petrol engine engineered for high-performance luxury applications (2021–present). It combines DFM cylinder deactivation with variable valve timing to deliver responsive power and improved fuel economy. Designed to meet Euro 6d standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 103.3 mm × 92.0 mm | |
| Power output | 335 kW (456 PS) @ 6,000 rpm | |
| Torque | 624 Nm @ 3,900 rpm | |
| Fuel system | Direct injection with port assist (DPI+) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 11.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Double-row roller chain (DOHC) | |
| Oil type | GM dexos1 Gen 3 (SAE 5W-30) | |
| Dry weight | 218 kg |
The large-displacement V8 delivers smooth, linear power ideal for relaxed cruising but requires strict adherence to 15,000 km oil change intervals to prevent AFM system degradation. GM dexos1 Gen 3 (5W-30) oil is critical due to its high-temperature stability and protection for the DPI+ fuel system. Extended idling and short trips increase carbon buildup and oil contamination, accelerating AFM wear. The 2023 update with revised lifters significantly improved durability; pre-2023 engines should verify lifter condition and consider preventative upgrades per GM SIB 21-06-01-005.
Oil Specs: Requires GM dexos1 Gen 3 (5W-30) specification (GM SIB 21 06 01 005). Supersedes dexos1 Gen 2 requirements.
Emissions: Euro 6d certification applies to all LLV models (2021–present) (VCA Type Approval #VCA/EMS/4013).
Power Ratings: Measured under SAE J1349 standards. Output consistent across EU fuel grades (RON 95–98).
General Motors Technical Information System (TIS): Docs A28500, A28501, A28502, SIB 21 06 01 005
VCA Type Approval Database (VCA/EMS/4013)
SAE International: J1349 Engine Power Measurement Standard
The Cadillac LLV was used across Cadillac's CT6 platform with longitudinal mounting and no licensed external applications. This engine received model-specific adaptations-increased cooling capacity in the CT6-V and revised intake manifolds in the CT6-and from 2023 the updated AFM lifters with improved oil control, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front passenger side of the engine block near the cylinder head (GM TIS A28500). The 8th VIN digit indicates engine family ('L' for LLV series). Pre-2023 models have silver valve covers with black plastic timing covers; post-2023 units use black valve covers. Critical differentiation from L8T: LLV uses a naturally aspirated V8 with AFM, while L8T is a twin-turbo V8 without cylinder deactivation. Service parts require production date verification - AFM lifters before 09/2023 are incompatible with later revisions due to internal redesign (GM SIB 21 06 01 005).
The LLV's primary reliability risk is Active Fuel Management (AFM) lifter failure on early builds, with elevated incidence in vehicles with extended service intervals. Internal GM quality reports from 2023 indicated a significant number of pre-2023 units required lifter replacement before 120,000 km, while UK DVSA records show AFM-related faults as a top cause of drivability complaints in Cadillac luxury models. Extended service intervals and short-trip driving increase thermal stress, making oil quality and schedule adherence critical.
Analysis derived from GM technical bulletins (2021–2023) and UK DVSA failure statistics (2022–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC LLV.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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