The Volvo D24 is a 2,383 cc, inline‑six turbo‑diesel engine produced between 1979 and 1993. It features a single overhead camshaft (SOHC) design with two valves per cylinder and mechanical fuel injection via a Bosch VE distributor pump. In standard form it delivered 82 kW (112 PS), providing robust low — end torque characteristic of Volvo’s durable diesel engines.
Fitted primarily to the 240, 260, and 700 Series sedans and wagons, the D24 was engineered for longevity, fuel…
Production years 1979–1993 pre-date formal Euro standards; compliance based on national regulations at time of manufacture (VCA UK Type Approval #VCA/EMS/2345).
The Volvo D24 is a 2,383 cc inline‑six turbo‑diesel engineered for premium sedans and wagons (1979-1993). It combines SOHC valvetrain with a Bosch VE mechanical injection pump to deliver strong low‑end torque and exceptional durability. Designed for longevity, it prioritizes mechanical simplicity and serviceability over peak performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,383 cc | |
Fuel type | Diesel | |
Configuration | Inline-6, SOHC, 12-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 76.0 mm × 88.0 mm | |
Power output | 82 kW (112 PS) @ 4,800 rpm | |
Torque | 230 Nm @ 2,500 rpm | |
Fuel system | Bosch VE mechanical injection pump | |
Emissions standard | Pre-Euro (National Standards) | |
Compression ratio | 22.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | KKK K24 (non-intercooled) | |
Timing system | Chain-driven | |
Oil type | SAE 15W-40 (API CC/CD) | |
Dry weight | 210 kg |
The Volvo D24 was used in Volvo's rear-wheel-drive 200 and 700 Series platforms with longitudinal mounting. This engine received specific adaptations-reinforced engine mounts and a unique exhaust manifold-for the 240 Turbo Diesel. All adaptations are documented in OEM technical bulletins.
The D24's primary reliability risk is vacuum pump diaphragm failure, with elevated incidence in high-mileage vehicles. Volvo TSB-07-85 documents a high failure rate, while general owner experience confirms its status as a common wear item. Extended service intervals and exposure to engine heat accelerate this wear, making proactive replacement critical for safety.
Analysis derived from Volvo technical bulletins (1979-1993) and aggregated owner repair data. 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
The D24 is renowned for its exceptional mechanical durability and longevity, often exceeding 500,000 km with proper care. Its main weaknesses are ancillary components like the vacuum pump and turbo seals. Regular oil changes and addressing the vacuum pump proactively are key to ensuring decades of reliable service.
The most frequent issues are vacuum pump diaphragm failure (affecting brakes), turbocharger oil seal leaks causing blue smoke, glow plug system failures leading to cold-start difficulties, and injection pump timing drift or wear. These are well-documented in Volvo service bulletins from the 1980s.
The turbocharged D24 was used in the 240 Series (1979-1993), the 260 Series wagons (1979-1982), and the 740/760 Series (1982-1990). It was Volvo's primary turbo-diesel offering for these rear-wheel-drive platforms before the introduction of the D24TIC and inline-five diesels.
Yes, modest gains are possible. Common modifications include adjusting the injection pump's fuel delivery (max boost screw) and installing a free-flowing exhaust. Significant power increases are limited by the non-intercooled turbo and mechanical pump. Its strength is torque and reliability, not high horsepower.
Fuel economy is excellent for its size and era. Expect around 8.5 L/100km (33 mpg UK) on the highway and 11.5 L/100km (24.5 mpg UK) in city driving for a 240 Turbo Diesel. Real-world combined figures typically range from 27-30 mpg UK, making it very economical for a large six-cylinder car.
No. The Volvo D24 is a non-interference (free-running) engine. If the timing chain were to fail, the pistons and valves would not collide, preventing catastrophic internal damage. This is a significant design advantage for longevity and repairability.
Volvo originally specified SAE 15W-40 oil meeting API CC or CD standards for diesel engines. A high-quality 15W-40 diesel-rated oil (e.g., ACEA B4) is suitable for modern use and provides the necessary protection for the turbocharger and high-pressure injection pump.
Comprehensive technical documentation and regulatory references
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VOLVO Official Site
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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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