The Ford 4GB is a 1,596 cc, inline-four naturally aspirated petrol engine produced between 2011 and 2018. It forms part of Ford's Sigma engine family, featuring double overhead camshafts (DOHC), variable cam timing (Ti-VCT), and port fuel injection. In standard tune, it delivers 85 kW (115 PS) and 155 Nm of torque, offering a balance of fuel efficiency and urban drivability for compact applications.
Fitted to models including the B292 Fiesta and C346 Focus, the 4GB was engineered for mainstream driving with a focus on low running costs and ease of maintenance. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, enabling Euro 5 compliance across its production run. The engine supports start-stop functionality in later variants to enhance fuel economy.
One documented concern involves premature wear of the timing chain tensioner, noted in Ford Service Action 16B05. This issue, primarily affecting units with extended oil change intervals, can lead to chain rattle and cam timing faults. From 2014, revised tensioner components were implemented across production lines to improve durability.
Production years 2011–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/7890).
The Ford 4GB is a 1,596 cc inline-four petrol engine engineered for compact platforms (2011–2018). It combines Ti-VCT variable cam timing with port fuel injection to deliver responsive low-end torque and urban efficiency. Designed to meet Euro 5 emissions standards, it balances simplicity with modern drivability for budget-conscious buyers.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,596 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 79.0 mm × 81.4 mm | |
| Power output | 85 kW (115 PS) @ 6,300 rpm | |
| Torque | 155 Nm @ 4,250 rpm | |
| Fuel system | Sequential port fuel injection | |
| Emissions standard | Euro 5 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing chain (front-mounted, wear-prone tensioner) | |
| Oil type | Ford WSS-M2C946-A (5W-30) | |
| Dry weight | 118 kg |
The naturally aspirated design provides predictable power delivery ideal for city driving but requires strict adherence to 15,000 km oil change intervals to prevent timing chain tensioner wear. Ford WSS-M2C946-A (5W-30) oil is essential due to its shear stability and anti-wear additives protecting the front-mounted chain system. Extended idling or short-trip driving increases carbon buildup on intake valves, necessitating periodic cleaning. Start-stop equipped models place additional stress on the starter motor and battery; ensure system health during service. Post-2014 models feature updated tensioner assemblies; pre-2014 units should be inspected per Ford SIB 16B05. Catalytic converter longevity depends on fuel quality and lambda sensor function.
Oil Specs: Requires Ford WSS-M2C946-A (5W-30) specification (Ford SIB 16B05). Supersedes ACEA A1/B1 requirements.
Emissions: Euro 5 certification applies to all 2011–2018 models (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel grades (Ford WSM Doc. 307-01-03).
Ford Workshop Manual (WSM): Docs 307-01-03, 303-03-01, SIB 16B05
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Ford 4GB was used across Ford's B292/C346 platforms with transverse mounting and shared architecture with Land Rover for micro-SUV applications. This engine received platform-specific adaptations-shorter intake manifolds in the Fiesta and revised cooling paths in the Focus-and from 2014 the facelifted Focus models adopted updated tensioner hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side engine block near the exhaust manifold (Ford WSM 307-01-03). The 8th VIN digit indicates engine family ('H' for 1.6L Sigma). Pre-2014 models have silver valve covers with black plastic timing covers; post-2014 units use black valve covers. Critical differentiation from 4GBA: Original 4GB has Denso ignition coils with flat connectors, while 4GBA uses Bosch coils with angled connectors. Service parts require production date verification - timing kits for engines before 08/2014 are incompatible with later units due to tensioner redesign (Ford SIB 16B05).
The 4GB's primary reliability risk is timing chain tensioner wear, with elevated incidence in urban driving cycles. Internal Ford quality reports from 2015 indicated a significant share of pre-2014 engines required tensioner replacement before 140,000 km, while UK DVSA records show intake-related faults contribute to a notable portion of emissions-related MOT failures. Short-trip driving and delayed oil changes increase guide and tensioner stress, making oil quality and interval adherence critical.
Analysis derived from Ford technical bulletins (2012-2016) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD 4GB.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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