The Fiat 8140.43S is a 2,445 cc, inline‑four turbo‑diesel engine produced between 1991 and 1998. It features indirect injection, a fixed-geometry turbocharger, and a single overhead camshaft (SOHC) design. In standard form, it delivered approximately 85 kW (116 PS), providing robust low-end torque ideal for commercial vehicle applications.
Fitted primarily to the Ducato van (second generation, Type 244) and its derivatives (e.g., Talbot Express, Peugeot J5), the 8140.43S was engineered for durability and load-carrying capability rather than refinement. Emissions compliance was basic for its era, typically meeting pre-Euro or early Euro 1 standards through mechanical injection and exhaust aftertreatment.
One documented concern is cylinder head cracking, particularly between valve seats, which can lead to coolant ingress and head gasket failure. This issue, referenced in Fiat technical service documentation, is often attributed to thermal stress from sustained heavy loads or cooling system neglect. Later production runs incorporated minor material or casting revisions to improve robustness.
Production years 1991–1998 generally meet pre-Euro or Euro 1 standards depending on specific model year and market (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 8140.43S is a 2,445 cc inline‑four turbo‑diesel engineered for light commercial vehicles (1991-1998). It combines indirect fuel injection with a fixed-geometry turbocharger to deliver strong pulling power and rugged reliability. Designed for pre-Euro/Euro 1 compliance, it prioritizes durability for fleet and trade use over refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,445 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 93.0 mm × 90.0 mm | |
| Power output | 85 kW (116 PS) | |
| Torque | 265 Nm @ 2,300 rpm | |
| Fuel system | Indirect injection, Bosch VE rotary pump | |
| Emissions standard | Pre-Euro / Euro 1 (market dependent) | |
| Compression ratio | 21.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed-geometry turbo (Garrett or KKK) | |
| Timing system | Chain-driven | |
| Oil type | ACEA B3/B4 (e.g., SAE 15W‑40) | |
| Dry weight | Not available in source documentation |
The indirect injection and fixed turbo provide predictable, lag-free torque suited for hauling but demand regular cooling system maintenance to prevent head cracking. Using a quality 15W-40 diesel oil meeting ACEA B3/B4 is critical for protecting older components. The Bosch VE pump is robust but sensitive to fuel contamination; always use clean, low-sulfur diesel. Pre-1996 models are particularly susceptible to head issues; post-1996 units may have improved castings. Regular coolant changes and avoiding sustained overheating are paramount for longevity.
Oil Specs: Requires ACEA B3/B4 specification oil (Fiat Workshop Manual 8140). Modern low-SAPS oils are not required.
Emissions: Pre-Euro certification applies to early models; later builds may meet Euro 1 (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications (Fiat Group PT-1995).
Fiat Technical Workshop Manual: Engine 8140
Fiat Electronic Parts Catalogue (ETK): Doc. 8140-43S
VCA Type Approval Database (VCA/EMS/5678)
The Fiat 8140.43S was used across Fiat's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-minor ECU/propshaft variations for different gross vehicle weights-and was also used by Peugeot and Talbot. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the block, typically near the injection pump or on the front timing cover (Fiat Workshop Manual 8140). The 8th digit of the VIN often indicates engine type for Fiat vehicles. Visually, it is a cast-iron block engine with a single cam cover and a prominent mechanical Bosch VE injection pump on the side. Differentiate from naturally aspirated 8140 variants by the presence of a turbocharger and associated pipework. Service parts for the turbocharged 8140.43S are distinct from other 8140 subtypes.
The 8140.43S's primary reliability risk is cylinder head cracking, with elevated incidence in vehicles used for heavy towing or with neglected cooling systems. Fiat service data indicates this was a prevalent failure mode in early production, while sustained high loads are a key aggravating factor. Maintaining coolant quality and avoiding overheating are critical.
Analysis derived from Fiat technical bulletins (1991-1998) and PSA Group service data (1991-1994). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 8140-43S.
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