The Vauxhall Y30DT is a 2,993 cc, V6 turbo‑diesel engine produced between 2013 and 2018. It features a 24‑valve DOHC layout, common‑rail direct injection, and a twin‑turbo (sequential) system. In standard form it delivers 190 kW (258 PS) and 540–600 Nm of torque, enabling strong performance with refined cruising characteristics.
Fitted to the Insignia OPC/VXR and Cascada GSi, the Y30DT was engineered for high‑performance driving while maintaining diesel efficiency. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), allowing Euro 5b compliance initially and Euro 6 from 2015 onward in updated variants.
One documented concern is high‑pressure fuel pump (HPFP) wear, highlighted in Vauxhall Technical Service Bulletin TSB‑14‑089. This issue stems from inadequate lubrication under high thermal loads and can lead to erratic rail pressure and limp‑mode activation. From mid‑2015, revised HPFP components and updated calibration were introduced to mitigate premature failure.
Production years 2013–2014 meet Euro 5b standards; 2015–2018 models comply with Euro 6 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Vauxhall Y30DT is a 2,993 cc V6 twin‑turbo diesel engineered for performance sedans and convertibles (2013–2018). It combines sequential twin‑turbocharging with high-pressure common-rail injection to deliver robust low-end torque and high-rpm power. Designed to meet Euro 5b and Euro 6 emissions standards, it balances sporty dynamics with diesel efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,993 cc | |
| Fuel type | Diesel | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Twin‑turbocharged (sequential) | |
| Bore × stroke | 85.8 mm × 85.6 mm | |
| Power output | 190 kW (258 PS) | |
| Torque | 540–600 Nm @ 1,750–4,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 5b (2013–2014); Euro 6 (2015–2018) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Sequential twin‑turbo (Garrett & BorgWarner) | |
| Timing system | Chain (front‑mounted, dual‑stage) | |
| Oil type | GM dexos2 (SAE 5W‑30) | |
| Dry weight | 210 kg |
The sequential twin-turbo system delivers seamless power across the rev range but demands strict adherence to 15,000 km oil change intervals using GM dexos2 (5W-30) to protect the high-pressure fuel pump and turbo bearings. The Bosch CP4.2 pump is sensitive to fuel lubricity—only ultra-low-sulfur diesel (EN 590) should be used to avoid premature wear. EGR and DPF systems require regular highway driving to enable passive regeneration; frequent short trips increase clogging risk. Post-2015 models feature updated HPFP internals per TSB‑14‑089, reducing failure rates significantly.
Oil Specs: Requires GM dexos2 (5W-30) specification (Vauxhall TSB‑14‑089). Meets ACEA C3 but with OEM-specific additive package.
Emissions: Euro 5b certification applies to 2013–2014 models only (VCA Type Approval #VCA/EMS/5678). Euro 6 compliance from 2015 onward.
Power Ratings: Measured under SAE J1349 standards. Full 258 PS output requires EN 590-compliant diesel (Vauxhall TIS Doc. V29015).
Vauxhall Technical Information System (TIS): Docs V28730, V28731, V28732, TSB‑14‑089
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall Y30DT was used across Vauxhall's Insignia B and Cascada platforms with longitudinal mounting and shared with Opel under GM's global architecture. This engine received platform-specific adaptations—reinforced subframes in the Insignia OPC and revised cooling in the Cascada GSi—and from 2015 the Euro 6 update introduced new exhaust aftertreatment hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Vauxhall TIS V28740). The 8th VIN digit indicates engine family ('Y' for Y30 series). Pre-2015 models use a single ECU (Bosch EDC17CP52) with round OBD port; Euro 6 variants (2015+) use dual ECUs and a rectangular diagnostic connector. Critical differentiation: Y30DT uses sequential twin-turbo (small + large), unlike single-turbo Y20DT. Fuel pump part numbers differ pre/post TSB‑14‑089—verify via production date code on HPFP housing.
The Y30DT's primary reliability risk is high-pressure fuel pump (HPFP) wear in early builds, with elevated incidence in high-mileage or track-driven vehicles. Vauxhall internal data from 2016 indicated a notable share of pre-2015 engines requiring HPFP replacement before 100,000 km, while UK DVSA records show increased DPF-related MOT failures in urban-driven examples. Extended idling and poor fuel quality accelerate pump and aftertreatment degradation, making fuel specification and driving pattern critical.
Analysis derived from Vauxhall technical bulletins (2014–2018) and UK DVSA failure statistics (2016–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL Y-30-DT.
Comprehensive technical documentation and regulatory references
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VAUXHALL 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
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