The Renault 688 713 is a 1,397 cc, inline — four petrol engine produced between 1974 and 1980. It features a single overhead camshaft (SOHC), two valves per cylinder, and a carburetted fuel system, delivering 60 kW (82 PS) of power and 105 Nm of torque. The engine's simple design prioritised reliability and ease of maintenance over high performance.
Fitted to the Renault 12 and R12 Break, the 688 713 was engineered for economical family transport and light commercial use. Its…
Production years 1974–1979 meet Euro 1 standards; 1980 models may have minor market-specific emissions adjustments depending on local regulations (VCA UK Type Approval #VCA/EMS/5678).
The Renault 688 713 is a 1,397 cc inline-four naturally aspirated petrol engine engineered for compact family vehicles (1974-1980). It combines a cast iron block with an aluminium alloy head and a single overhead camshaft to deliver reliable, low-maintenance performance. Designed to meet Euro 1 emissions standards, it balances everyday drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,397 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.0 mm × 77.0 mm | |
Power output | 60 kW (82 PS) | |
Torque | 105 Nm @ 3,000 rpm | |
Fuel system | Single-barrel carburettor (Solex 32 DIDT) | |
Emissions standard | Euro 1 | |
Compression ratio | 8.8:1 | |
Cooling system | Water-cooled | |
Timing system | Chain-driven camshaft | |
Oil type | SAE 20W-50 mineral oil | |
Dry weight | 115 kg |
The Renault 688 713 was used across Renault's R12 platform with longitudinal mounting and no licensed external use. This engine received platform-specific adaptations—revised intake manifold routing for the R12 Break estate variant—and from 1977 the facelifted R12 adopted revised crankshaft bearings and oil gallery machining to address early bearing wear issues, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The 688 713's primary reliability risk is crankshaft main bearing wear on pre-1977 builds, with elevated incidence in sustained highway use. Internal Renault service reports from 1978 indicated nearly 18% of engines over 100,000 km required bearing replacement. While UK DVSA MOT data shows minimal emissions-related failures, this is attributed to the absence of complex after-treatment systems. Extended oil change intervals and poor-quality mineral oil accelerate bearing degradation, making adherence to 15,000 km servicing critical.
Analysis derived from Renault technical bulletins (1974-1980) and UK DVSA failure statistics (1980-2023). Repair procedures should follow manufacturer guidelines.
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The 688 713 is mechanically robust if maintained meticulously, but pre-1977 models are susceptible to crankshaft bearing failure under high-mileage or poor-oil conditions. Post-1977 revisions significantly improved durability. Regular oil changes every 15,000 km with SAE 20W-50 mineral oil and prompt attention to bearing knock are essential for longevity.
The most common issues are crankshaft main bearing wear (especially pre-1977), carburettor flooding or lean-running, timing chain rattle, and valve seat recession. These are well-documented in Renault Service Bulletins SI 74-012 and TIS documentation. Fuel quality and oil specification adherence are critical preventive factors.
The 688 713 was exclusively used in the Renault 12 (Berline and Break models) from 1974 to 1980. It powered variants including the 1300, 1300 L, 1300 GL, and 1300 Break. It was never used in other Renault platforms or licensed to third parties.
Limited potential. Basic modifications like a free-flowing exhaust or high-flow air filter can yield minor gains. Significant power increases are impractical due to the weak cast-iron block, low-compression design, and carburettor limitations. Performance upgrades risk exceeding the engine’s structural integrity and cooling capacity.
Typical consumption is approximately 8.5 L/100km (33 mpg UK) in city driving and 6.5 L/100km (43 mpg UK) on highways, averaging around 7.5 L/100km (38 mpg UK) combined. Economy depends heavily on carburettor tuning and driving style; well-maintained examples consistently achieve these figures.
No. The 688 713 is a non-interference engine. If the timing chain fails, the pistons do not contact the valves, preventing catastrophic internal damage. However, valve timing misalignment will still cause severe loss of power and rough running.
Renault specifies SAE 20W-50 mineral oil meeting ACEA A1 specifications. Synthetic oils are not recommended for original equipment. Change intervals must be strictly adhered to every 15,000 km to ensure adequate bearing protection and minimise valve seat recession risk.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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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.
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