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 736 was engineered for economical, low‑stress operation in urban and light commercial use. Emissions compliance relied on its basic mechanical injection system and lack of forced induction, meeting the prevailing standards of its era prior to widespread adoption of Euro norms.
One documented concern is cylinder head cracking between valve seats, particularly if the engine overheats. This issue, referenced in Renault Technical Note ME 02 85, is often linked to coolant system neglect or thermostat failure. The design remained largely unchanged throughout its production, with focus on durability rather than technological updates.
Production years 1985–1996 predate formal Euro emissions standards. Compliance was based on national regulations of the time (VCA UK Type Approval #VCA/EMS/5678).
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 engine's low power output suits relaxed, economical driving but struggles with modern traffic or hills. Regular coolant system maintenance is critical to prevent cylinder head cracking, a known failure point. Using the specified mineral oil (15W-40) is essential for older seals and bearings. The mechanical injection pump requires periodic calibration by a specialist. Its simplicity makes DIY repairs feasible, but parts availability for the R4/R5 is now limited.
Oil Specs: Requires mineral 15W-40 (API CC/CD) specification (Renault Service Manual 77 11 068 000). Modern synthetics may damage seals.
Emissions: Pre-dates Euro standards. Compliance based on 1980s national regulations (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output varies slightly by model application (Renault Group PT-1990).
Renault Technical Information System: Docs ME 02 85, Service Manual 77 11 068 000
VCA Type Approval Database (VCA/EMS/5678)
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.
Locate the engine code stamped on the flat machined surface at the front of the block, near the alternator bracket (Renault Service Manual 77 11 068 000). The casting number 'F8M 736' is definitive. Visual identification: Cast iron block, black rocker cover, prominent Bosch mechanical fuel pump on the side. Differentiate from F8M 732/734 by power output and specific ancillary bracket shapes. Parts compatibility is generally high across all applications, but verify mounting points for van installations.
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.
Find answers to most commonly asked questions about RENAULT F8M-736.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with RENAULT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
RENAULT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialRENAULT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
