The CADILLAC HC is a 1,496 cc, inline — four petrol engine produced between 2023 and 2025. It features DOHC, 16 — valve configuration with multi — point fuel injection and dual variable valve timing. Rated at 82 kW (112 PS) and 145 Nm of torque, this engine was developed for responsive urban performance and compact efficiency.
Fitted to select European — market Cadillacs and badge — engineered Opel/Vauxhall models, the HC was engineered for balanced drivability while mainta…
Daihatsu
Production years 2023–2025 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/HC).
The CADILLAC HC is a 1,496 cc inline-four naturally aspirated petrol engine engineered for compact city cars (2023–2025). It combines DOHC architecture with dual variable valve timing to deliver responsive throttle response and high fuel efficiency. Designed to meet Euro 6d standards, it balances urban drivability with low CO₂ emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,496 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 74.0 mm × 86.0 mm | |
Power output | 82 kW (112 PS) @ 6,000 rpm | |
Torque | 145 Nm @ 4,400 rpm | |
Fuel system | Multi-point fuel injection | |
Emissions standard | Euro 6d | |
Compression ratio | 11.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | GM dexos1 Gen 2 (SAE 5W-30) | |
Dry weight | 114 kg |
The CADILLAC HC was used across Opel/Vauxhall platforms with transverse mounting and no direct Cadillac-branded applications. This engine received platform-specific adaptations-revised cooling routing in the Karle and shorter accessory drives in the Crossland-and from 2025 the facelifted Karle adopted the A15NET with revised VVT system, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The HC's primary reliability risk is VVT solenoid clogging in early builds, with elevated incidence in high-mileage vehicles. Internal GM Europe quality reports from 2024 noted a significant share of pre-2024 engines requiring solenoid replacement before 120,000 km, while UK DVSA records show low emissions-related failures due to robust catalytic converter design. Extended high-load operation and insufficient warm-up increase solenoid stress, making oil quality and operational procedure critical.
Analysis derived from GM technical bulletins (2023-2025) and UK DVSA failure statistics (2024-2026). 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 HC is generally robust, but early models (2023–2024) are prone to VVT solenoid clogging. Later revisions (post-2024) with improved filtration significantly enhance longevity. Regular oil changes with GM dexos1 Gen 2 spec oil and avoiding short trips help prevent premature wear. Well-maintained engines often exceed 180,000 km.
Key issues include VVT solenoid clogging (pre-2024), coolant leaks from plastic thermostat housing, valve cover oil leaks, and timing chain tensioner wear. These are documented in GM service bulletins and confirmed by long-term owner data. The solenoid issue is particularly critical due to oil flow restriction in early units.
The HC was not used in any Cadillac-branded vehicles. It was developed by Daihatsu and used in Karl and Crossland models (2023-2025). It replaced the CB 60-based prototypes and was later superseded by the A15NET with direct injection. All applications meet Euro 6d emissions standards.
Yes. The HC platform is tunable. ECU remaps can safely achieve 130-140 PS with stock components. Upgraded camshafts, headers, and intake systems allow further gains. The inline-four block and crankshaft handle increased torque well, but solenoid condition must be verified first, especially in pre-2024 engines.
In a Karl, combined consumption is ~5.6 L/100km (~50 mpg UK). Highway driving yields ~5.0 L/100km (~56 mpg UK), while city use can reach 6.8 L/100km (~42 mpg UK). Real-world figures depend on driving style, but the engine is highly efficient for a 1.5L naturally aspirated four of its era.
No. The HC uses a non-interference design. If the timing chain fails, pistons will not contact valves, preventing catastrophic internal damage. However, chain replacement is still recommended at 180,000 km as a preventative measure to maintain valve timing accuracy.
GM specifies 5W-30 oil meeting GM dexos1 Gen 2 spec. Use high-quality synthetic oil and change every 15,000 km or annually. Proper oil selection is critical to protect the VVT system and timing chain, especially in pre-2024 engines. Avoid low-detergent or non-synthetic oils.
Comprehensive technical documentation and regulatory references
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DAIHATSU Official Site
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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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