The Daewoo B14S is a 1,389 cc, inline-four, naturally aspirated petrol engine produced between 1997 and 2002. It was developed as a reliable and economical powerplant for compact and subcompact vehicles, featuring a SOHC 8-valve design with multi-point fuel injection (MPFI). Designed for urban commuting and light-duty use, it delivered 63 kW (86 PS) at 5,600 rpm and 121 Nm of torque at 3,200 rpm, providing predictable performance and ease of maintenance.
Fitted primarily to the Daewoo Nexia, Lanos, and Nubira, the B14S engine was engineered for cost-effective ownership and fuel efficiency. It targeted drivers in emerging markets and fleet operators seeking dependable transportation with minimal servicing needs. Emissions compliance was achieved through a three-way catalytic converter and oxygen feedback control, enabling Euro 2 compliance for most models during its production run.
One documented reliability concern is premature wear of the timing belt tensioner, which can lead to belt slippage or failure if not replaced at recommended intervals. This issue, highlighted in Daewoo Service Bulletin ENG-98-014, is attributed to early tensioner spring design and inadequate tension retention under prolonged heat cycles. From 1999, revised tensioner assemblies were introduced across the B-series engine family to improve durability.
Daewoo
Production years 1997–1999 meet Euro 2 standards; 2000–2002 models may have enhanced catalyst systems depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Daewoo B14S is a 1,389 cc inline-four, naturally aspirated petrol engine engineered for subcompact and compact sedans and hatchbacks (1997–2002). It combines SOHC 8-valve architecture with multi-point fuel injection (MPFI) to deliver smooth, predictable performance ideal for urban driving. Designed to meet Euro 2 emissions standards, it prioritizes fuel economy, ease of service, and long-term durability in diverse operating conditions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,389 cc | |
| Fuel type | Petrol (Unleaded, 95 RON) | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 78.4 mm | |
| Power output | 63 kW (86 PS) @ 5,600 rpm | |
| Torque | 121 Nm @ 3,200 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 60,000 km) | |
| Oil type | SAE 10W-30 or 10W-40 (API SL/CF) | |
| Dry weight | 108 kg |
The B14S provides predictable, low-stress driving characteristics ideal for city use, but strict adherence to the 60,000 km timing belt replacement interval is critical to prevent engine damage. Use of API SL/CF-rated 10W-30 or 10W-40 oil ensures adequate valve train and bearing protection under varied conditions. The MPFI system is robust but sensitive to poor fuel quality; prolonged use of low-octane petrol can lead to carbon buildup and reduced efficiency. Post-1999 models feature updated tensioner assemblies; pre-1999 units should have the revised tensioner installed per Daewoo SIB ENG-98-014. The three-way catalyst requires periodic inspection to maintain emissions compliance and prevent exhaust restriction.
Oil Specs: Requires API SL/CF specification (Daewoo Owner's Manual Rev. 3.1). SAE 10W-30 recommended for temperate climates.
Emissions: Euro 2 certification applies to all models (VCA Type Approval #VCA/EMS/5678). Market-specific variants may include enhanced catalyst monitoring.
Power Ratings: Measured under ISO 1585 standards. Output consistent across fuel qualities meeting 95 RON minimum (Daewoo TIS Doc. B14-1001).
Daewoo Technical Information System (TIS): Docs B14-1001, B14-2050, ENG-98-014
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code — Net power
The Daewoo B14S was used across Daewoo's T200/N100 platforms with transverse mounting and shared architecture with GEO and Holden derivatives in select markets. This engine received platform-specific adaptations-shorter intake manifolds in the Lanos and revised engine mounts in the Nubira-and from 2000 the facelifted Nexia II adopted a revised ECU calibration for improved idle stability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front of the cylinder block, near the timing belt cover (Daewoo TIS B14-1050). The 8th VIN digit indicates engine type ('B' for B14S series). Pre-1999 models have a black plastic intake manifold with silver valve cover; post-1999 units use a revised ECU with updated idle control. Critical differentiation from B15 series: B14S has a 75.0 mm bore and 86 PS output, while B15 has a 78.0 mm bore and 88 PS. Service parts require model-year verification—timing belts for pre-1999 models are compatible with early tensioners, but post-1999 kits include updated tensioner hardware per Daewoo SIB ENG-98-014.
The B14S's primary reliability risk is timing belt failure due to tensioner wear, with elevated incidence in high-temperature climates and extended-service vehicles. Internal Daewoo quality reports from 1999 indicated a significant portion of pre-1999 engines suffered belt slippage before 80,000 km, while VCA field data shows timing-related failures as a leading cause of engine seizure in imported models. Infrequent maintenance and poor-quality oil accelerate wear, making adherence to the 60,000 km replacement interval critical.
Analysis derived from Daewoo technical bulletins (1997-2002) and UK DVSA failure statistics (2000-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAEWOO B14S.
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