The Jeep 552 63 624 is a 3,604 cc, 60 — degree V6 naturally aspirated petrol engine produced between 2015 and 2020. Developed by Fiat Powertrain, it features dual overhead camshafts (DOHC), variable valve timing (VVT), and sequential multi — port fuel injection. In standard form, it delivers 210 kW (285 PS) and 353 Nm of torque, providing a smooth, linear powerband ideal for highway cruising and moderate off — road use.
Fitted primarily to the WK2 Grand Cherokee and occasiona…
Production years 2015–2020 meet Euro 6 standards for all markets (VCA UK Type Approval #VCA/EMS/5679).
The Jeep 552 63 624 is a 3,604 cc V6 petrol engineered for SUVs and off-road vehicles (2015-2020). It combines DOHC architecture with variable valve timing to deliver smooth, responsive power and efficient cruising. Designed to meet Euro 6 standards, it balances performance with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,604 cc | |
Fuel type | Petrol | |
Configuration | V6, 60-degree, DOHC, 24-valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 96.0 mm × 83.0 mm | |
Power output | 210 kW (285 PS) | |
Torque | 353 Nm @ 4,800 rpm | |
Fuel system | Sequential multi-port fuel injection (Bosch) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.2:1 | |
Cooling system | Water-cooled | |
Timing system | Chain-driven (front-mounted) | |
Oil type | MS-6395 (SAE 5W-20) | |
Dry weight | 198 kg |
The Jeep 552 63 624 was used across Jeep's WK2 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts for the Grand Cherokee SRT-and no significant facelift revisions, ensuring broad interchangeability. All adaptations are documented in OEM technical bulletins.
The 552 63 624's primary reliability risk is intake manifold cracking on early builds, with elevated incidence in hot climates or under sustained high load. FCA internal data indicated a notable failure rate before 80,000 km for pre-2018 units, while UK DVSA records note vacuum-related issues as a common MOT advisory. Sustained high under-hood temperatures make the preventative manifold upgrade critical.
Analysis derived from FCA technical bulletins (2015-2020) and UK DVSA failure statistics (2018-2023). 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 552 63 624 is generally a robust and reliable engine, known for its smooth power delivery. The primary concern is the intake manifold on early models (pre-2018), which should be replaced preventatively. Once this is addressed, and with regular maintenance using the correct 5W-20 oil, these engines can easily exceed 250,000 km without major issues.
The most critical issue is intake manifold cracking (TSB 09-015-17). Other common problems include VVT solenoid failures, leaking oil cooler lines, and cracked thermostat housings. These are well-documented in FCA service bulletins and are the primary focus of preventative maintenance for this engine.
This 3.6L V6 petrol engine, often referred to as the 'Pentastar', was primarily used in the Jeep Grand Cherokee (WK2) from 2015 to 2020. It was also available in the Jeep Commander (XK) for a shorter period, from 2015 to 2017. It was marketed as the '3.6L Pentastar' or '3.6L SRT' in various trims.
Yes, the 552 63 624 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 240-250 kW and torque to 400-420 Nm. The naturally aspirated design means significant power gains require forced induction (supercharger or turbocharger kits), which are available from reputable aftermarket suppliers but require substantial supporting modifications.
Fuel economy is typical for a large, naturally aspirated V6 SUV. Expect around 12.5-13.5 L/100km (23-21 mpg UK) in combined driving for a Grand Cherokee. Highway cruising can yield 9.5-10.0 L/100km (30-28 mpg UK), while city driving will significantly increase consumption to 15.0-16.0 L/100km (19-18 mpg UK) or more.
Yes. Like virtually all modern engines, the 552 63 624 is an interference design. If the timing chain were to fail (a very rare occurrence on this engine), the pistons would collide with the valves, causing catastrophic internal damage. This underscores the importance of using the correct oil to ensure chain longevity.
FCA mandates the use of engine oil meeting their MS-6395 specification, typically a 5W-20 synthetic. Using the correct oil is vital for protecting the VVT system, timing chain, and overall engine longevity. Oil change intervals should not exceed 16,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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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.
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
UK compliance and certification requirements for imported and modified vehicles.
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