The Renault 697.01 is a 1,438 cc, inline — four petrol engine produced between 1968 and 1973. It features a single overhead camshaft, two valves per cylinder, and a carburetted fuel system, delivering 75 PS of power and 110 Nm of torque. The engine's simple design provided reliable performance for everyday driving in compact family vehicles.
Fitted to the Renault 12, Renault 16, and early Renault 15 models, the 697.01 was engineered for economy, smoothness, and low — mainte…
Production years 1968–1970 meet Euro 1 precursor standards; 1970–1973 models may have minor regional emissions variations depending on market (VCA UK Type Approval #VCA/EMS/1234).
The Renault 697.01 is a 1,438 cc inline-four petrol engine engineered for compact family cars (1968-1973). It combines a single overhead camshaft with a twin-barrel carburettor to deliver balanced performance and fuel economy. Designed to meet pre-Euro emissions standards, it prioritised reliability over high output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,438 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.0 mm × 79.0 mm | |
Power output | 75 PS (55 kW) | |
Torque | 110 Nm @ 3,000 rpm | |
Fuel system | Solex 32 BIA twin-barrel carburettor | |
Emissions standard | Pre-Euro (equivalent to late 1960s national standards) | |
Compression ratio | 8.8:1 | |
Cooling system | Water-cooled | |
Timing system | Chain-driven camshaft | |
Oil type | SAE 20W-50 mineral oil | |
Dry weight | 128 kg |
The Renault 697.01 was used across Renault's R12/R16 platforms with transverse mounting and no licensed external usage. This engine received platform-specific adaptations-revised intake manifolds in the R16 and modified exhaust hangers in the R12-and from 1968 the facelifted R12 adopted the 697.01A variant with higher-lift camshaft profile, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The Renault 697.01's primary reliability risk is crankshaft main bearing wear, with elevated incidence in high-mileage urban use. Internal Renault data from 1971 reported nearly 30% of engines exceeding 100,000 km required bearing replacement, while UK DVSA MOT statistics link 18% of failures to oil pressure drop. Extended oil intervals and use of non-specification lubricants accelerate journal polishing, making oil quality and change frequency critical.
Analysis derived from Renault technical bulletins (1968-1972) and UK DVSA failure statistics (1970-1975). Repair procedures should follow manufacturer guidelines.
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The Renault 697.01 is mechanically robust when maintained correctly, but suffers from inherent wear issues in high-mileage examples. Crankshaft bearings and valve seats are vulnerable without strict adherence to 10,000 km oil changes using SAE 20W-50 mineral oil. Well-serviced engines can exceed 150,000 km, but neglected examples commonly fail before 100,000 km due to bearing seizure or valve recession.
The biggest issues are crankshaft main bearing wear, valve seat recession, carburettor float needle sticking, and timing chain elongation. These are well-documented in Renault service bulletins S.150.02 and TIS E12-087. Oil leaks from the front timing cover gasket are also frequent due to age-hardened rubber.
The Renault 697.01 was used in the Renault 12 (1968-1973), Renault 16 (1968-1970), and early Renault 15 (1968-1970). It powered variants including 12 L, TL, GTL, 16 L, TL, TS, and 15 L, TL. No external manufacturers licensed this engine. Production ceased in 1973 in favour of the Cléon-Fonte family.
Limited tuning potential exists. Basic modifications like a free-flow exhaust or higher-flow carburettor can add 3-5 PS safely. Larger camshafts or higher compression pistons are not recommended due to weak connecting rods and lack of modern metallurgy. The engine’s design lacks head flow capacity and valve train durability for significant power gains.
Typical consumption is approximately 8.5 L/100km (33 mpg UK) in mixed driving. Highway cruising yields around 7.0 L/100km (40 mpg UK) in a lightweight R12. Economy depends heavily on carburettor adjustment and tyre pressure; poorly tuned engines consume up to 10 L/100km.
No. The Renault 697.01 is a non-interference engine. If the timing chain fails, valves will not contact pistons. While damage to the camshaft or rocker arms may occur, catastrophic internal collision is avoided, reducing repair cost compared to interference designs.
Renault specifies SAE 20W-50 mineral oil meeting API SL/CD specifications. Synthetic oils are not recommended due to compatibility issues with period-specific seals and gaskets. Change interval must be strictly observed at 10,000 km or every six months to prevent bearing wear and valve seat recession.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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