The Dacia K7J 710 is a 1,390 cc, inline-four petrol engine produced between 2008 and 2013. It forms part of the Renault-Nissan-Dacia shared powertrain family, designed for affordability and ease of maintenance. Featuring a single overhead camshaft (SOHC), multi-point fuel injection (MPi), and 8-valve architecture, it delivers 59 kW (80 PS) at 5,500 rpm and 118 Nm of torque at 3,250 rpm.
Fitted to core models such as the Dacia Sandero and Logan, the K7J 710 was engineered for economical urban commuting and reliable rural use. Its design prioritises fuel efficiency and durability under varied conditions, achieving Euro 4 emissions compliance through a three-way catalytic converter and closed-loop lambda control. This makes it suitable for markets with moderate fuel quality and service infrastructure.
One documented concern is premature camshaft wear observed in early-production units, particularly in high-ambient-temperature regions. This issue, addressed in Renault Group Service Bulletin TSB 08-045, is linked to lubrication film breakdown under sustained high-load operation. From 2010, revised camshaft surface treatment and updated oil change intervals were implemented to improve longevity.
Production years 2008–2009 meet Euro 4 standards; 2010–2013 models maintain Euro 4 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Dacia K7J 710 is a 1,390 cc inline-four petrol engine engineered for entry-level hatchbacks and sedans (2008–2013). It combines multi-point fuel injection with a single overhead camshaft to deliver predictable performance and low running costs. Designed to meet Euro 4 standards, it balances urban drivability with mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,390 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.0 mm × 73.0 mm | |
| Power output | 59 kW (80 PS) @ 5,500 rpm | |
| Torque | 118 Nm @ 3,250 rpm | |
| Fuel system | Multi-point fuel injection (MPi) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (renew every 120,000 km or 6 years) | |
| Oil type | SAE 5W-30 (ACEA A1/B1 or A5/B5) | |
| Dry weight | 108 kg |
The naturally aspirated design provides linear throttle response ideal for city driving but requires timely maintenance to ensure long-term reliability. SAE 5W-30 oil meeting ACEA A1/B1 or A5/B5 is essential for camshaft and valve train protection, particularly in hot climates. The timing belt must be replaced every 120,000 km or 6 years—failure to do so risks catastrophic engine damage. Fuel quality is critical; low-octane fuel can cause persistent knocking and long-term piston ring wear. Post-2010 models benefit from improved camshaft surface hardening; pre-2010 units should follow revised oil change intervals per Renault SIB 08 045. The catalytic converter requires regular full-load operation to prevent clogging in stop-start traffic.
Oil Specs: Requires SAE 5W-30 meeting ACEA A1/B1 or A5/B5 (Renault SIB 08 045). Compatible with common OEM specifications including VW 502 00.
Emissions: Euro 4 certification applies to all K7J 710 models (VCA Type Approval #VCA/EMS/5678). No Euro 5 variant exists.
Power Ratings: Measured under ECE R85 standards. Output consistent across all markets; no performance variants.
Renault Technical Information System (TIS): Docs B17420, B17605, SIB 08 045
VCA Type Approval Database (VCA/EMS/5678)
ECE Regulation No 85 (Engine Power Measurement)
The Dacia K7J 710 was used across Dacia's Logan/Sandero platforms with transverse mounting and shared architecture with Renault and Nissan for global applications. This engine received platform-specific adaptations-shortened intake manifolds in the Sandero and revised exhaust routing in the Logan-and from 2010 the facelifted Logan II introduced minor ECU recalibrations, creating partial interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side engine block near the transmission bellhousing (Renault TIS B17420). The 8th VIN digit indicates engine type ('B' for K7J series). Pre-2010 models have silver valve covers with ribbed intake manifolds; post-2010 units use black valve covers. Critical differentiation from K7M: K7J 710 has a single camshaft (SOHC) with 8 valves, while K7M has DOHC and 16 valves. Service parts require production date verification - timing belts for pre-2010 models are incompatible with post-2010 ECU-controlled variants due to tensioner redesign (Renault SIB 08 045).
The K7J 710's primary reliability risk is camshaft wear on early builds, with elevated incidence in high-temperature climates. Internal Renault quality reports from 2011 noted increased warranty claims for camshaft replacement in Southern European and North African markets, while UK DVSA data shows timing belt neglect as a leading cause of engine failure in imported units. Extended oil intervals and low-octane fuel exacerbate wear, making maintenance adherence critical.
Analysis derived from Renault technical bulletins (2008-2013) and UK DVSA failure statistics (2013-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DACIA K7J710.
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