The Peugeot K2B, also designated TU3S, is a 1,360 cc, inline‑four naturally aspirated petrol engine produced between 1992 and 2000. It features a single overhead camshaft (SOHC) with 8 valves and multi — point fuel injection, representing an evolution from carburetted predecessors. This refined design delivered 55 kW (75 PS) and 110 Nm of torque, offering improved drivability and emissions control for its compact class.
Fitted to sportier variants such as the 106 Rally…
Production years 1992–1995 meet Euro 1 standards; 1996–2000 models meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/3456).
The Peugeot K2B (TU3S) is a 1,360 cc inline‑four naturally aspirated petrol engine engineered for hot hatches and compacts (1992-2000). It combines a simple SOHC 8-valve design with multi-point fuel injection to deliver spirited, linear performance. Designed for Euro 2 compliance in later years, it prioritizes driver engagement and mechanical simplicity over outright power.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,360 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 77.0 mm × 73.0 mm | |
Power output | 55 kW (75 PS) | |
Torque | 110 Nm @ 3,400 rpm | |
Fuel system | Multi-point fuel injection (Bosch Motronic) | |
Emissions standard | Euro 1 (1992-1995); Euro 2 (1996-2000) | |
Compression ratio | 9.7:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven camshaft | |
Oil type | API SH/SJ (SAE 10W‑40) | |
Dry weight | 102 kg |
The Peugeot K2B (TU3S) was used across Peugeot's hot hatch platforms with transverse mounting. This engine received platform-specific adaptations-lightweight flywheel in the 106 Rallye-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The K2B's (TU3S) primary reliability risk is camshaft lobe wear, with elevated incidence in vehicles subjected to aggressive cold starts or using incorrect oil. Peugeot SIB 5023 E documents this as a known fault, while owner reports frequently cite a rhythmic tapping noise as the first symptom. Neglecting the 60,000 km timing belt interval makes catastrophic engine failure a near certainty.
Analysis derived from Peugeot technical bulletins (1992-2000) and owner-reported failure data (1995-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The K2B is generally reliable with proper maintenance. Its main weakness is camshaft lobe wear, which is often caused by driver abuse or incorrect oil. Adhering strictly to the 60,000 km timing belt change, using the correct 10W-40 oil, and allowing the engine to warm up before hard use are crucial for long-term reliability and preserving its sporty character.
The most frequent issues are camshaft lobe wear causing a tapping noise (SIB 5023 E), timing belt failure if neglected, distributor bearing wear leading to whining noises and misfires, and coolant temperature sensor failure causing running problems. These are well-documented in Peugeot service bulletins and owner forums.
The K2B (TU3S) engine was primarily fitted to the sporty variants of the Peugeot 106 (Rallye, XS from 1992-2000) and the Peugeot 306 (XS, S16 from 1993-1997). It was the performance-oriented 1.4L petrol engine for these models, prized for its rev-happy nature and tunability.
Yes, it is a popular tuning engine. Common upgrades include a performance camshaft, sports exhaust, and ECU chip, yielding 15-25 kW. More extensive builds with head work and larger throttle bodies can exceed 100 kW. Its robust bottom end and free-revving nature make it very receptive to modifications, especially in the lightweight 106 Rallye.
Moderate for its performance. In a Peugeot 106 Rallye, expect real-world figures of around 7.5 L/100km (38 mpg UK) in mixed driving and 6.5 L/100km (43 mpg UK) on the highway. The heavier 306 XS will return slightly less, typically 8.0-8.5 L/100km (33-35 mpg UK) combined, reflecting its more aggressive use.
Yes. The K2B is an interference engine. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe and expensive damage to the cylinder head. This makes the 60,000 km timing belt replacement interval absolutely critical.
Peugeot originally specified API SH/SJ grade oil, typically a 10W-40 mineral or semi-synthetic oil. A modern equivalent is an ACEA A3/B3 10W-40 semi-synthetic oil. Using a quality petrol engine oil with the correct viscosity is essential to protect the camshaft lobes from premature wear.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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