The Renault K7M 790 is a 1,598 cc, inline‑four petrol engine produced between 1996 and 2005. It features a single overhead camshaft (SOHC) design with 8 valves and multi‑point fuel injection, delivering outputs typically around 55 kW (75 PS) and 128 Nm of torque. Its simple, robust architecture made it ideal for cost — effective transverse mounting in Renault's entry — level vehicle segments.
Fitted to models such as the Clio II, Kangoo I, and Twingo II, the K7M 790 was engine…
Production years 1996–2000 meet Euro 2 standards; 2001–2005 models may have Euro 3 compliance depending on market .
The Renault K7M 790 is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for entry-level vehicles (1996-2005). It combines multi‑point fuel injection with a SOHC 8‑valve layout to deliver dependable low‑end torque and urban drivability. Designed to meet Euro 2 (and some market‑specific Euro 3) standards, it prioritizes simplicity and serviceability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 79.5 mm × 80.5 mm | |
Power output | 55 kW (75 PS) @ 5,500 rpm | |
Torque | 128 Nm @ 2,800 rpm | |
Fuel system | Multi‑point fuel injection (Siemens) | |
Emissions standard | Euro 2 (pre‑2001); Euro 3 depending on market | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt (front‑mounted) | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 108 kg |
The Renault K7M 790 was used across Renault's A/B platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Kangoo I and revised air intake for the Clio II-and from 2001 received minor ECU updates for emissions, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
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The K7M 790's primary reliability risk is timing belt failure if not replaced at recommended intervals, which will result in severe engine damage. Internal Renault service data indicated that adherence to the 30,000 km belt replacement schedule is critical, while general owner feedback highlights distributor cap and rotor wear as a common ignition issue. Extended oil change intervals or use of incorrect oil viscosity can accelerate camshaft wear.
Analysis derived from Renault technical bulletins (1996-2002) and owner-reported failure data (2002-2023). 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 K7M 790 is renowned for its mechanical simplicity and durability, making it very reliable long-term if basic maintenance is followed. The absolute critical item is replacing the timing belt every 30,000 km. With this and regular oil changes, these engines can easily exceed 300,000 km without major issues.
The most critical issue is timing belt failure due to neglected replacement. Other common problems include worn distributor caps/rotors causing misfires, failing coolant temperature sensors, and leaking valve cover gaskets. These are all well-documented and relatively inexpensive to fix.
This 1.6L 8-valve petrol engine was used in Renault's budget-friendly models from 1996-2005. Key applications include the Clio II (1998-2005), Kangoo I (1997-2005), and Twingo II (2000-2005), typically badged as '1.6 8v'.
Significant power gains are difficult due to the SOHC 8-valve design. Basic modifications like a performance air filter and free-flow exhaust might yield 5-8 kW. More aggressive tuning requires internal engine work and is generally not cost-effective for this engine.
Fuel economy is modest by modern standards. Expect around 9.0 L/100km in city driving and 6.0 L/100km on the highway, translating to approximately 31 mpg UK combined. Its strength is low-end torque, not ultimate efficiency.
Yes. The K7M 790 is an interference engine. If the timing belt fails or jumps, the pistons will collide with the open valves, causing catastrophic engine damage. This makes adhering to the 30,000 km replacement interval non-negotiable.
Renault recommends a 10W-40 mineral or semi-synthetic oil meeting the RN0700 standard. While not as critical as in DOHC engines, using the correct oil helps protect the camshaft. Change intervals should not exceed 15,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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