The Vauxhall G9U 630 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 2010 and 2019. It features a high-pressure common‑rail fuel system, variable geometry turbocharger (VGT), dual overhead camshafts (DOHC), and a cast-iron block with aluminium head. In standard form it delivers 100 kW (136 PS) and 320 Nm of torque, with strong low‑rpm responsiveness ideal for mid‑size and commercial vehicle applications.
Fitted to models such as the Vivaro A and Movano A under a supply agreement with Renault, the G9U 630 was engineered for durability, load-carrying capability, and urban efficiency. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue on post‑2016 variants, enabling adherence to Euro 5 and Euro 6 standards.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, highlighted in Vauxhall Service Bulletin 13‑058. This issue is linked to insufficient lubrication during frequent cold starts and short-trip usage. From 2014, revised pump drive components and updated camshaft sprockets were introduced to mitigate the failure mode.
Production years 2010–2015 meet Euro 5 standards; 2016–2019 models meet Euro 6 (VCA UK Type Approval #VCA/EMS/7890).
The Vauxhall G9U 630 is a 2,188 cc inline‑four turbo‑diesel engineered for light commercial and MPV applications (2010–2019). It combines Bosch common‑rail direct injection with a single variable‑geometry turbocharger to deliver robust low-end torque and commercial-grade reliability. Designed to meet Euro 5 (pre-2016) and Euro 6 (post-2016) standards, it integrates advanced aftertreatment systems including DPF and SCR.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,188 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 96.4 mm | |
| Power output | 100 kW (136 PS) | |
| Torque | 320 Nm @ 1,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 5 (2010–2015); Euro 6 (2016–2019) | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | GM Dexos2 (SAE 5W‑30) | |
| Dry weight | 165 kg |
The robust cast-iron block provides commercial-grade durability but demands strict adherence to 15,000 km oil change intervals to protect the high-pressure fuel pump and turbocharger. GM Dexos2 (5W-30) oil is critical due to its low-SAPS formulation, which safeguards the DPF and SCR system. Frequent short trips without full warm-up cycles accelerate carbon buildup in the EGR and intake. Post-2014 engines include an updated fuel pump drive gear per Vauxhall SIB 13 058. Euro 6 variants require AdBlue top-ups and uninterrupted DPF regeneration to avoid limp-mode activation.
Oil Specs: Requires GM Dexos2 (5W-30) specification (Vauxhall SIB 13 058). Meets ACEA C2/C3 standards.
Emissions: Euro 5 certification applies to 2010–2015 models; Euro 6 applies to 2016–2019 models (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under SAE J1349 standards. Output validated on EU5+ ultra-low-sulfur diesel (Vauxhall TIS Doc. V21210).
Vauxhall Technical Information System (TIS): Docs V21110, V21115, SIB 13 058
Renault Parts Catalogue (EPC) G9U-630
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall G9U 630 was used across Vauxhall's Vivaro A and Movano A platforms with transverse mounting under a supply agreement with Renault. This engine received platform-specific adaptations—reinforced engine mounts in the Movano A and revised coolant routing in the Vivaro A—but retained Renault’s core architecture and service requirements. All units are mechanically identical to the Renault G9U 630 used in the Trafic II and Master II. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Vauxhall TIS V21180). The 7th VIN digit indicates engine family ('G' for G9U series). All G9U 630 units feature a black aluminium valve cover with “G9U” embossed. Critical differentiation from earlier F9Q engines: G9U has a Bosch CP4.2 high-pressure pump mounted on the rear of the cylinder head and, on Euro 6 models, an AdBlue dosing unit near the DPF. Service parts for fuel pump drive gears differ before and after production date 03/2014 (Vauxhall SIB 13 058).
The G9U 630's primary reliability risk is high-pressure fuel pump drive wear, with elevated incidence in stop-start urban or delivery-cycle usage. Vauxhall internal data from 2017 indicated a measurable uptick in pump failures before 120,000 km in vehicles with frequent cold starts, while UK DVSA records show DPF/SCR-related MOT advisories rising in high-idle usage profiles. Incomplete warm-up cycles and incorrect oil specification accelerate wear, making adherence to Dexos2 oil and service intervals critical.
Analysis derived from Vauxhall technical bulletins (2013–2019) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL G9U-630.
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)
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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
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VCA Certification Portal
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