The Renault F8Q 662 is a 1,870 cc, inline‑four naturally aspirated diesel engine produced between 1987 and 1996. It features a SOHC, 8‑valve design with indirect injection via a Bosch mechanical fuel pump, delivering outputs of 46 kW (62 PS) and 120 Nm of torque. Its robust, simple mechanical design prioritised reliability and ease of maintenance for light commercial and passenger use.
Fitted primarily to the R19 and Express van, the F8Q 662 was engineered for economical, low‑stress operation with a focus on torque for load-carrying. Emissions compliance relied on its basic mechanical injection system, meeting the prevailing national standards of its era prior to formal 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 (which also covers the F8M series), is often linked to coolant system neglect. The design remained largely unchanged throughout its production, with focus on durability rather than technological updates.
Production years 1987–1996 predate formal Euro emissions standards. Compliance was based on national regulations of the time (VCA UK Type Approval #VCA/EMS/5679).
The Renault F8Q 662 is a 1,870 cc inline‑four naturally aspirated diesel engineered for economy cars and light vans (1987-1996). 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 | 1,870 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 80.0 mm × 93.0 mm | |
| Power output | 46 kW (62 PS) | |
| Torque | 120 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 | 130 kg |
The engine's modest power suits relaxed, economical driving but struggles with modern traffic or heavy loads. Regular coolant system maintenance is critical to prevent cylinder head cracking, a known failure point shared with the F8M series. 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, though parts for the R19 are becoming scarce.
Oil Specs: Requires mineral 15W-40 (API CC/CD) specification (Renault Service Manual 77 11 068 001). Modern synthetics may damage seals.
Emissions: Pre-dates Euro standards. Compliance based on 1980s/90s national regulations (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under DIN 70020 standards. Output is consistent across applications (Renault Group PT-1992).
Renault Technical Information System: Docs ME 02 85, Service Manual 77 11 068 001
VCA Type Approval Database (VCA/EMS/5679)
The Renault F8Q 662 was used across Renault's R19 platform with longitudinal mounting. This engine received minor platform-specific adaptations-different engine mounts for the Express van-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 11 068 001). The casting number 'F8Q 662' is definitive. Visual identification: Cast iron block, black rocker cover, prominent Bosch mechanical fuel pump on the side. Differentiate from F8M 736 by displacement (1.9L vs 1.6L) and specific ancillary bracket shapes. Parts compatibility is generally high across all applications, but verify mounting points for van installations.
The F8Q 662'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 for the F8Q series, 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 (1987-1996) and owner club failure statistics (2000-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F8Q-662.
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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
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