The Ford ASDB is a 1,988 cc, inline-four, naturally aspirated petrol engine produced between 1996 and 2002. It features a single overhead camshaft (SOHC), 8-valve configuration, and belt-driven valvetrain, designed for mid-size passenger vehicles. With a power output of 66 kW (90 PS) at 5,000 rpm and 140 Nm of torque, it delivers smooth performance suited to everyday driving and family use.
Fitted primarily to the Ford Mondeo (MK2) and Scorpio, the ASDB engine was engineered for reliability, fuel efficiency, and low maintenance. It uses sequential multi-point fuel injection (S-MPI) and a distributorless ignition system with coil-on-plug technology. Emissions control is achieved through exhaust gas recirculation (EGR) and a three-way catalytic converter, meeting Euro 2 standards from 1996 onward.
One documented concern is intake manifold runner flap failure due to plastic degradation, particularly in high-mileage vehicles. Highlighted in Ford Service Communication 97-05-06, this issue arises from thermal stress and material fatigue in the variable intake system. In 1999, Ford revised the flap actuator design and upgraded the polymer composition to improve durability.
Production years 1996–2002 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/9123).
The Ford ASDB is a 1,988 cc inline-four petrol engine developed for Ford's European mid-size models (1996–2002). It combines SOHC valvetrain architecture with sequential multi-point injection to provide reliable drivability and mechanical simplicity. Designed to meet tightening emissions requirements, it balances economy with serviceability for high-volume applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,988 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.8 mm × 88.0 mm | |
| Power output | 66 kW (90 PS) @ 5,000 rpm | |
| Torque | 140 Nm @ 2,750 rpm | |
| Fuel system | Sequential multi-point fuel injection (S-MPI) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Toothed belt (non-interference design) | |
| Oil type | SAE 10W-40 mineral (API SH/CC) | |
| Dry weight | 132 kg |
The naturally aspirated design with S-MPI ensures smooth throttle response and cold-start reliability, ideal for daily commuting and family vehicles. The non-interference timing belt design reduces risk of catastrophic engine damage, though replacement every 90,000 km is recommended per Ford Service Bulletin 96-10-06. SAE 10W-40 mineral oil meeting API SH/CC is required to maintain valve train lubrication and prevent premature camshaft wear. The variable intake manifold should be inspected annually for flap operation and vacuum actuator integrity, especially in high-mileage engines. Post-1999 models benefit from reinforced flap actuators; pre-1999 units should follow Ford Service Communication 97-05-06 for inspection and upgrade.
Oil Specs: Requires API SH/CC-rated 10W-40 mineral oil (Ford Service Bulletin 97-05-06). Synthetic oils not approved for original specification.
Emissions: Euro 2 certification applies to all 1996–2002 production (VCA Type Approval #VCA/EMS/9123). No market-specific variants.
Power Ratings: Measured under DIN 70020 standards. Output consistent across all markets and fuel grades.
Ford Technical Information System (TIS): Docs B18650, 96-10-06, 97-05-06
VCA Type Approval Database (VCA/EMS/9123)
DIN Standards: DIN 70020 Engine Power Testing
The Ford ASDB was used across Ford's Mondeo and Scorpio platforms with transverse mounting and no licensed external usage. This engine received platform-specific adaptations-reinforced mounts in the Scorpio and compact exhaust routing in the Mondeo-and from 1999 the updated Mondeo MK2 adopted improved intake manifold actuator design, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side engine block near the exhaust manifold (Ford TIS B18660). The 8th VIN digit indicates engine type ('S' for ASDB series). Pre-1999 models have a ribbed black plastic intake manifold with visible seams; post-1999 units use a smooth-faced manifold with integrated actuator reinforcement. Critical differentiation from Zetec engine: ASDB uses a single-row timing belt and SOHC 8-valve head, while Zetec engines use DOHC 16-valve with twin-row belt. Service parts require model-year verification - intake actuators for pre-1999 models are incompatible with later units due to internal gear design differences (Ford Service Communication 97-05-06).
The ASDB's primary reliability risk is intake manifold runner flap failure in early production engines, with higher incidence in vehicles operated in hot climates with frequent short trips. Internal Ford field reports from 2001 noted a significant share of pre-1999 units requiring actuator replacement before 100,000 km, while UK DVSA records show emissions-related faults dominate pre-2002 MOT failures. Extended service intervals and poor-quality fuel accelerate wear, making adherence to 15,000 km service intervals critical.
Analysis derived from Ford technical bulletins (1996-2002) and UK DVSA failure statistics (1996-2002). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD ASDB.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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