The Fiat 8140.63 is a 2,500 cc, inline‑six turbo‑diesel engine produced between 1991 and 1998. It features direct injection, a fixed-geometry turbocharger, and a single overhead camshaft (SOHC) design. In standard form, it delivered 85 kW (115 PS) and 270 Nm of torque, providing robust pulling power for commercial applications.
Fitted primarily to the Ducato van (Type 244) and Daily light truck, the 8140.63 was engineered for durability and low-end torque in demanding commercial use. Emissions compliance for its era was managed through basic mechanical injection and exhaust aftertreatment, meeting Euro 1 standards.
One documented concern is injector pump seal failure, leading to diesel contamination of the engine oil sump. This issue, referenced in Fiat Technical Service Bulletin TSB‑8140‑003, is often linked to prolonged high-load operation and heat stress on the pump housing seals.
Production years 1991–1998 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/8140).
The Fiat 8140.63 is a 2,500 cc inline‑six turbo‑diesel engineered for light commercial vehicles (1991-1998). It combines direct mechanical injection with a fixed‑geometry turbocharger to deliver strong low‑end pulling power and operational durability. Designed to meet Euro 1 standards, it prioritizes reliability for commercial fleets.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,500 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑6, SOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 87.0 mm × 92.0 mm | |
| Power output | 85 kW (115 PS) | |
| Torque | 270 Nm @ 2,200 rpm | |
| Fuel system | Bosch VE rotary injection pump | |
| Emissions standard | Euro 1 | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (KKK or IHI) | |
| Timing system | Gear-driven camshaft | |
| Oil type | ACEA E2 (SAE 15W‑40) | |
| Dry weight | 380 kg |
The gear-driven timing system offers exceptional durability for high-mileage commercial use but generates more noise than chain or belt systems. The Bosch VE pump requires strict adherence to 10,000 km oil change intervals using ACEA E2 specification oil to prevent internal wear and seal degradation. Injector pump seal failure (per TSB-8140-003) is a critical risk under sustained heavy load; immediate oil analysis and pump inspection are recommended if fuel dilution is suspected. The fixed-geometry turbo provides predictable boost but lacks the low-RPM responsiveness of VGT units.
Oil Specs: Requires ACEA E2 (15W-40) specification for optimal pump and bearing protection (Fiat Workshop Manual 8140).
Emissions: Euro 1 certification applies to all 1991-1998 production models (VCA Type Approval #VCA/EMS/8140).
Power Ratings: Measured under ISO 1585 standards. Output is consistent across model range (Fiat Technical Specification Sheet).
Fiat Technical Information System: Workshop Manual 8140, SIB TSB-8140-003
VCA Type Approval Database (VCA/EMS/8140)
ISO 1585: Road vehicles — Engine test code — Net power
The Fiat 8140.63 was used across Fiat's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Daily for payload handling-and no major facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface of the cylinder block, adjacent to the injection pump (Fiat Workshop Manual 8140). The code "8140.63" is clearly visible. Visual identification: Cast-iron block with a single, centrally located cam cover and a Bosch VE injection pump mounted on the right side (driver's side for LHD). Differentiate from the naturally aspirated 8140.43 by the presence of the turbocharger and associated pipework on the exhaust manifold. Service parts for the 8140.63 are generally compatible across all model years and vehicle applications unless superseded by a technical bulletin.
The 8140.63's primary reliability risk is diesel contamination of engine oil via injector pump seal failure, with elevated incidence in vehicles under constant heavy load. Fiat TSB-8140-003 documents this as a known service issue, while fleet maintenance logs frequently cite it as a cause for premature engine wear. High operational temperatures and extended service intervals make proactive pump inspection and oil analysis critical.
Analysis derived from Fiat technical bulletins (1991-1998) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 8140-63.
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