The Renault F8M 736 is a 1,596 cc, inline‑four naturally aspirated diesel engine produced between 1985 and 1996. It features a SOHC, 8‑valve design with indirect injection via a Bosch mechanical fuel pump, delivering modest outputs of 35–37 kW (47–50 PS) and 98–103 Nm of torque. Its robust, simple mechanical design prioritised reliability and ease of maintenance over outright performance.
Fitted to utilitarian models such as the R4, R5, R9, R11, and Express van, the F8M 7…
Production years 1985–1996 predate formal Euro emissions standards. Compliance was based on national regulations of the time .
The Renault F8M 736 is a 1,596 cc inline‑four naturally aspirated diesel engineered for economy cars and light vans (1985-1996). It combines indirect injection with a simple SOHC valvetrain to deliver dependable, low‑stress operation. Designed for pre‑Euro regulatory environments, it prioritises mechanical simplicity and serviceability over emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,596 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 78.0 mm × 83.5 mm | |
Power output | 35–37 kW (47–50 PS) | |
Torque | 98–103 Nm @ 2,500 rpm | |
Fuel system | Bosch mechanical injection pump | |
Emissions standard | Pre‑Euro (National Standards) | |
Compression ratio | 22.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven camshaft | |
Oil type | Mineral 15W‑40 (API CC/CD) | |
Dry weight | 125 kg |
The Renault F8M 736 was used across Renault's R4/R5/R9/R11 platforms with longitudinal mounting. This engine received minor platform-specific adaptations-different engine mounts for the Express van and altered ancillary layouts in the R11-but no major facelift revisions occurred, ensuring broad interchangeability. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
The F8M 736's primary reliability risk is cylinder head cracking, with elevated incidence following coolant system neglect. Renault Technical Note ME 02 85 documents this failure mode, while owner club data suggests it is the most common cause of major engine rebuilds. Infrequent coolant changes and ignoring thermostat warnings make prompt attention to overheating critical.
Analysis derived from Renault technical bulletins (1985-1996) and owner club failure statistics (2000-2023). 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
Yes, if meticulously maintained. Its simple, robust design is inherently reliable. The biggest threat is overheating, which can crack the cylinder head. Regular coolant changes, prompt thermostat replacement, and using correct mineral oil are key to achieving high mileage without major issues.
Cylinder head cracking (from overheating), mechanical fuel pump wear, glow plug/relay failure, and rear main seal leaks are the most frequent issues. These are well-documented in Renault service literature and owner forums due to the engine's age and simplicity.
This 1.6L diesel was primarily used in the Renault R4 (B/C), R5 (Super 5), R9, R11, and the Express van during the late 1980s and early 1990s. It was the standard diesel option for these models, replacing earlier F8M variants.
Significant power gains are impractical. Minor tweaks to the mechanical injection pump can yield a few extra kW, but the engine's low compression (for a diesel) and basic design limit potential. Focus is better placed on reliability and economy.
Excellent for its era. Expect 5.5–6.5 L/100km (43–51 mpg UK) on a mixed cycle in a lightweight car like the R5. The Express van will be slightly thirstier. Its low power output naturally encourages economical driving habits.
No. The F8M 736 is a non-interference engine. If the timing chain fails, the pistons will not contact the valves. This is a significant safety feature, allowing the engine to stop without catastrophic internal damage, though the chain should still be replaced if worn.
A good quality mineral 15W-40 oil meeting API CC or CD specifications is recommended. Modern synthetic oils are generally not advised for these older engines as they can cause leaks from aged seals designed for thicker mineral oils.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.