The CADILLAC HD — EP is a 1,496 cc, inline — four turbo — diesel engine produced between 2024 and 2025. It features DOHC, 16 — valve configuration with common — rail direct injection and variable geometry turbocharging. Rated at 70 kW (95 PS) and 230 Nm of torque, this engine was developed for responsive low — end pulling power and urban efficiency.
Fitted to select European — market Cadillacs and badge — engineered Opel/Vauxhall models, the HD — EP was engineered for strong torq…
Daihatsu
Production years 2024–2025 meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/HD-EP).
The CADILLAC HD-EP is a 1,496 cc inline-four turbo-diesel engine engineered for compact and mid-size applications (2024–2025). It combines DOHC architecture with common-rail injection and a variable geometry turbocharger to deliver strong low-RPM torque and efficient cruising. Designed to meet Euro 6d standards, it balances performance with everyday economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,496 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.0 mm × 86.0 mm | |
Power output | 70 kW (95 PS) @ 4,000 rpm | |
Torque | 230 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2.0 common-rail (up to 1,800 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1544V) | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | GM dexos2 (SAE 5W-30) | |
Dry weight | 148 kg |
The CADILLAC HD-EP 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 Crossland and shorter accessory drives in the Grandland-and from 2025 the facelifted Crossland adopted the Y15DT with revised EGR system, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The HD-EP's primary reliability risk is high-pressure fuel pump wear in early builds, with elevated incidence in high-mileage vehicles. Internal GM Europe quality reports from 2025 noted a significant share of pre-2025 engines requiring HPFP replacement before 120,000 km, while UK DVSA records show low emissions-related failures due to robust DPF design. Extended high-load operation and insufficient warm-up increase pump stress, making oil quality and operational procedure critical.
Analysis derived from GM technical bulletins (2024-2025) and UK DVSA failure statistics (2025-2026). 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 HD-EP is generally robust, but early models (2024–2025) are prone to HPFP wear. Later revisions (post-2025) with improved pump hardening significantly enhance longevity. Regular oil changes with GM dexos2 spec oil and avoiding short trips help prevent premature wear. Well-maintained engines often exceed 180,000 km.
Key issues include HPFP wear (pre-2025), EGR valve clogging, valve cover oil leaks, and turbo actuator sticking. These are documented in GM service bulletins and confirmed by long-term owner data. The HPFP issue is particularly critical due to fuel quality sensitivity in early units.
The HD-EP was not used in any Cadillac-branded vehicles. It was developed by Daihatsu and used in Crossland and Grandland models (2024-2025). It replaced the DL 50-based prototypes and was later superseded by the Y15DT with revised EGR. All applications meet Euro 6d emissions standards.
Yes. The HD-EP platform is tunable. ECU remaps can safely achieve 110-125 PS with stock components. Upgraded intercoolers, exhausts, and intake systems allow further gains. The inline-four block and crankshaft handle increased torque well, but fuel pump condition must be verified first, especially in pre-2025 engines.
In a Crossland, combined consumption is ~4.8 L/100km (~59 mpg UK). Highway driving yields ~4.2 L/100km (~67 mpg UK), while city use can reach 5.8 L/100km (~49 mpg UK). Real-world figures depend on driving style, but the engine is highly efficient for a 1.5L turbo-diesel of its era.
No. The HD-EP 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 dexos2 spec. Use high-quality synthetic oil and change every 15,000 km or annually. Proper oil selection is critical to protect the HPFP and turbocharger, especially in pre-2025 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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