The Fiat 8140.43 is a 2,445 cc, inline‑four naturally aspirated diesel engine produced between 1986 and 1995. It features a robust indirect injection (IDI) system with a Bosch mechanical fuel pump and overhead valve (OHV) design. This configuration prioritizes durability and ease of maintenance over peak performance, delivering 59 kW (80 PS) and 172 Nm of torque.
Fitted primarily to commercial vehicles like the Ducato (244) and Daily (2 series), the 8140.43 was engineered for dependable, low-revving torque ideal for load-carrying and stop-start urban duties. Emissions compliance was basic for its era, meeting pre-Euro or early Euro 1 standards through its simple mechanical injection and lack of complex after-treatment systems.
One documented concern is cylinder head cracking, particularly between valve seats, often exacerbated by overheating or coolant neglect. This issue, referenced in Fiat workshop bulletins for the Ducato/Scudo, is linked to thermal stress in the cast iron head. Later production runs saw minor material or casting process revisions to improve robustness.
Production years 1986–1995 pre-date formal Euro standards or meet early Euro 1 depending on specific market and model year (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 8140.43 is a 2,445 cc inline‑four naturally aspirated diesel engineered for light commercial vehicles (1986-1995). It combines indirect injection with a robust OHV design to deliver dependable, low-revving torque for load-carrying. Designed for pre-Euro or early Euro 1 compliance, it prioritizes simplicity and serviceability over refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,445 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, OHV, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 93.0 mm × 90.0 mm | |
| Power output | 59 kW (80 PS) @ 4,200 rpm | |
| Torque | 172 Nm @ 2,400 rpm | |
| Fuel system | Bosch VE-type indirect injection pump | |
| Emissions standard | Pre-Euro / Early Euro 1 | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Gear-driven camshaft | |
| Oil type | ACEA E2 / SAE 15W-40 | |
| Dry weight | 285 kg |
The OHV design and indirect injection provide rugged simplicity and strong low-RPM grunt for hauling, but demand regular valve clearance adjustments and meticulous cooling system maintenance to prevent head cracking. ACEA E2 15W-40 oil is critical for its high-sulfur fuel tolerance and robust bearing protection. Avoid sustained high RPM; the engine thrives at moderate loads. Pre-heating glow plugs are essential for cold starts. Cylinder head integrity is paramount; any sign of overheating warrants immediate inspection per Fiat TB-8140-01.
Oil Specs: Requires ACEA E2 specification oil (Fiat Workshop Manual 8140). API CC/CD also acceptable for older formulations.
Emissions: Pre-Euro certification applies to most models (VCA Type Approval #VCA/EMS/5678). Some late-production 1995 units may meet early Euro 1 for specific markets.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications with no documented higher ratings (Fiat Group PT-1990).
Fiat Technical Information System: Workshop Manual 8140, TB-8140-01
VCA Type Approval Database (VCA/EMS/5678)
EEC Directive 80/1269 Power Measurement Standards
The Fiat 8140.43 was used across Fiat's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts for the Daily vs. Ducato-but no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss on the left-hand side of the engine block, just below the cylinder head (Fiat Workshop Manual 8140). The full code "8140.43" should be clearly visible. Visually, it is identifiable by its tall, cast iron block, prominent Bosch VE injection pump on the right side, and lack of a turbocharger. Critical differentiation from turbocharged 8140 variants (e.g., 8140.43S): absence of turbo, intercooler, and associated pipework. Parts are generally interchangeable across Ducato/Daily/J5/C25 applications unless specified otherwise in the EPC.
The 8140.43's primary reliability risk is cylinder head cracking, with elevated incidence following overheating events. Fiat workshop data indicates this is the most common major repair for high-mileage units, while its simple mechanical design otherwise offers excellent longevity. Neglecting coolant maintenance or ignoring overheating warnings makes proactive head inspection critical.
Analysis derived from Fiat technical bulletins (1985-1995) and UK DVSA failure statistics (historical data). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 8140-43.
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Regulation (EC) No 715/2007
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