The Ford JJM is a 2,495 cc, V6 naturally aspirated petrol engine produced between 2010 and 2016. It was developed for use in Ford's North American and select global performance and utility vehicles, featuring dual overhead camshafts (DOHC), variable cam timing (Ti-VCT), and sequential multi-port fuel injection. In standard tuning, it delivered 154 kW (207 PS) and 249 Nm of torque, with applications ranging from sedans to light trucks.
Fitted to models such as the Taurus SHO, Flex, and Explorer, the JJM engine was engineered to balance responsive driving dynamics with towing capability and highway refinement. Emissions compliance was achieved through integrated exhaust gas recirculation (EGR), a three-way catalyst, and closed-loop fuel control, allowing Euro 5 compliance in European-spec variants and ULEV certification in the US. Its broad torque curve supports strong mid-range performance for overtaking and load hauling.
One documented concern is premature wear in the timing chain tensioner assembly, particularly under sustained high-load conditions. This issue, referenced in Ford Service Action 13B07, is attributed to oil flow restrictions in early-design guides affecting upper rail lubrication. In 2013, Ford issued revised tensioner and guide components, improving long-term reliability in later production runs.
Production years 2010–2012 meet Euro 5 standards; 2013–2016 models comply with Euro 6 in European markets (VCA UK Type Approval #VCA/EMS/5678).
The Ford JJM is a 2,495 cc V6 petrol engine engineered for full-size and performance-oriented models (2010–2016). It combines Ti-VCT variable cam timing with sequential multi-port fuel injection to deliver linear throttle response and smooth power delivery. Designed to meet Euro 5 and later Euro 6 standards, it balances performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,495 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 154 kW (207 PS) @ 6,500 rpm | |
| Torque | 249 Nm @ 4,500 rpm | |
| Fuel system | Sequential multi-port fuel injection | |
| Emissions standard | Euro 5 (2010–2012); Euro 6 (2013–2016) | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Dual chain (front-mounted; tensioner wear-prone) | |
| Oil type | Ford WSS-M2C946-B (5W-20) | |
| Dry weight | 185 kg |
The naturally aspirated V6 provides smooth, predictable power ideal for daily driving and towing but requires strict adherence to 15,000 km oil change intervals to prevent timing chain wear. Ford WSS-M2C946-B (5W-20) oil is critical due to its low viscosity formulation supporting internal lubrication under high-temperature operation. Extended idling and frequent short trips increase carbon buildup in the intake and EGR passages. The Ti-VCT system demands clean oil flow to maintain cam phaser function; clogged passages can trigger timing faults. Post-2013 models feature updated tensioners; pre-2013 units should be inspected per Ford SIB 13B07. Emissions systems require periodic scan tool diagnostics to confirm catalyst efficiency and sensor health.
Oil Specs: Requires Ford WSS-M2C946-B (5W-20) specification (Ford SIB 13B07). Meets ILSAC GF-5 standards.
Emissions: Euro 5 applies to 2010–2012 models; Euro 6 certification applies to 2013–2016 European variants (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel qualities meeting EN 228.
Ford Technical Information System (TIS): Docs B34721, B35018, SIB 13B07
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Ford JJM was used across Ford's DN50/CD4 platforms with longitudinal mounting and shared architecture with Lincoln derivatives in North America. This engine received platform-specific adaptations-shortened accessory drives in the Flex and revised cooling layouts in the Explorer-and from 2013 the facelifted Taurus SHO adopted the updated tensioner assembly, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front passenger-side cylinder block near the exhaust manifold (Ford TIS B34721). The 8th VIN digit indicates engine type ('D' for JJM series). Pre-2013 models have silver valve covers with black plastic cam covers; post-2013 units use dark grey valve covers. Critical differentiation from similar Duratec units: JJM has a single exhaust manifold and sequential fuel injection; Duratec 35 has twin manifolds. Service parts require production date verification - timing kits for engines before 06/2013 are incompatible with later units due to tensioner redesign (Ford SIB 13B07).
The JJM's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in high-mileage and towing applications. Internal Ford quality reports from 2014 indicated a notable share of pre-2013 engines requiring chain service before 150,000 km, while UK DVSA records show timing-related failures contributing to emissions test failures in modified units. Extended idling and inconsistent oil changes increase guide and rail stress, making oil quality and interval adherence critical.
Analysis derived from Ford technical bulletins (2012–2016) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD JJM.
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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.
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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.
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