The Dacia K7M 800 is a 1,598 cc, inline-four, naturally aspirated petrol engine produced between 1996 and 2013. It was developed by Renault and used extensively across Dacia's lineup during the pre-Renault revival era. Featuring a cast-iron block, aluminium head, and multi-point fuel injection (MPi), it delivers 55 kW (75 PS) at 5,500 rpm and 128 Nm at 3,000 rpm. Its simple architecture ensures ease of maintenance and broad mechanical compatibility.
Fitted to core models such as the Dacia SupeRNova, Logan, and Pick-Up, the K7M 800 was engineered for durability and cost-effective ownership in emerging markets. Designed for urban and rural utility use, it offers predictable performance and low running costs. Emissions compliance was achieved through a three-way catalytic converter and lambda feedback, enabling Euro 2 compliance for early models and Euro 3 for post-2001 builds.
One documented concern is cylinder head warping under sustained high load or overheating conditions, highlighted in Renault Service Bulletin TSB ENG-1999-K7M. This issue stems from the head's thin deck design and sensitivity to coolant system neglect. In 2004, revised head gaskets and improved cooling system checks were introduced to reduce failure incidence in hot climates.
Production years 1996–2000 meet Euro 2 standards; 2001–2013 models comply with Euro 3 (VCA UK Type Approval #VCA/EMS/5678).
The Dacia K7M 800 is a 1,598 cc inline-four petrol engine engineered for budget-oriented passenger and utility vehicles (1996–2013). It combines multi-point fuel injection with a robust iron-block design to deliver reliable daily performance. Designed to meet Euro 2 and Euro 3 emissions standards, it prioritizes longevity and serviceability over high output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol (Unleaded RON 95) | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 76.0 mm × 88.0 mm | |
| Power output | 55 kW (75 PS) @ 5,500 rpm | |
| Torque | 128 Nm @ 3,000 rpm | |
| Fuel system | Multi-point fuel injection (MPi) | |
| Emissions standard | Euro 2 (1996–2000); Euro 3 (2001–2013) | |
| Compression ratio | 9.7:1 | |
| Cooling system | Water-cooled, thermostat-regulated | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 90,000 km) | |
| Oil type | SAE 10W-40, ACEA A2/B2 or A3/B3 | |
| Dry weight | 112 kg |
The K7M 800 delivers predictable, low-stress performance ideal for city and rural use but requires strict adherence to 90,000 km timing belt replacement intervals to prevent valve damage. SAE 10W-40 oil meeting ACEA A2/B2 or higher is recommended for thermal stability in high-temperature environments. Overheating is the primary risk factor for head warping, so coolant system integrity (radiator, thermostat, hoses) must be verified annually. Fuel quality is critical—low-octane or contaminated petrol can cause pre-ignition and long-term valve recession. Post-2004 models benefit from improved head gasket materials; pre-2004 units should use OEM-specified gaskets during servicing. The three-way catalytic converter requires fully functional lambda sensors to avoid clogging and performance loss.
Oil Specs: Requires ACEA A2/B2 or A3/B3 specification (Renault SIB 04 05 22). Compatible with API SL/SM grades.
Emissions: Euro 2 applies to 1996–2000 models (VCA Type Approval #VCA/EMS/5678). Euro 3 certification valid for 2001–2013 production.
Power Ratings: Measured under ISO 1585 standards. Output assumes clean air filter, correct ignition timing, and RON 95 fuel (Renault TIS Doc. B13579).
Renault Technical Information System (TIS): Docs B13579, B14286, SIB 04 05 22
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1996 Road vehicles — Engine test code — Net power
The Dacia K7M 800 was used across Dacia's Logan/Supernova platforms with longitudinal mounting and shared with Renault in certain Eastern European markets. This engine received platform-specific adaptations-shorter intake manifolds in the Logan and reinforced engine mounts in the Pick-Up-and from 2005 the facelifted Logan Phase II adopted revised ECU mapping for improved idle stability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the starter motor (Renault TIS B13800). The 8th VIN digit indicates engine type ('L' for K7M series). Pre-2004 models have a green valve cover; post-2004 units use black. Critical differentiation from K7J: K7M 800 has a distributor-less ignition system with coil packs, while K7J 1.2L uses a distributor. Service parts require model-year verification—timing belts for pre-2004 Supernova are incompatible with post-2004 Logan due to pulley revisions (Renault SIB 04 05 22).
The K7M 800's primary reliability risk is cylinder head warping, with elevated incidence in high-temperature or poorly maintained vehicles. Renault field reports from 2003–2007 noted a significant number of pre-2004 units requiring head resurfacing before 150,000 km, while VCA MOT data shows cooling system faults as a leading cause of emissions failures in older Dacias. Extended intervals and low coolant levels increase thermal stress, making annual cooling system inspection critical.
Analysis derived from Renault technical bulletins (1999-2010) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DACIA K7M800.
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