The Volvo B 30 E is a 2,979 cc, inline‑six petrol engine produced between 1975 and 1980. It features a cast‑iron block, overhead camshaft (OHC) design with a timing chain, and Bosch D — Jetronic electronic fuel injection. This naturally aspirated unit delivered approximately 160 hp (119 kW) and 177 lb‑ft (240 Nm) of torque, offering refined power for Volvo's flagship models.
Fitted exclusively to the Volvo 260 Series (262, 264, 265), the B 30 E was engineered for smooth, effo…
Production years 1975–1980 predate formal Euro emissions standards. Compliance is not applicable (VCA UK Type Approval not required for pre-1970 vehicles).
The Volvo B 30 E is a 2,979 cc inline‑six petrol engine engineered for flagship sedans and wagons (1975-1980). It combines a robust cast-iron block with a modern OHC valvetrain and timing chain to deliver smooth, linear power. Designed for early emissions regulations, it used electronic fuel injection to meet US federal standards, though formal Euro compliance was not yet mandated.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,979 cc | |
Fuel type | Petrol | |
Configuration | Inline‑6, OHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 88.9 mm × 80.0 mm | |
Power output | 160 hp (119 kW) @ 5,500 rpm | |
Torque | 177 lb-ft (240 Nm) @ 3,500 rpm | |
Fuel system | Bosch D-Jetronic electronic fuel injection | |
Emissions standard | Not applicable (pre-dates standards) | |
Compression ratio | 9.3:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven single overhead camshaft | |
Oil type | SAE 10W-40 (mineral or semi-synthetic) | |
Dry weight | 185 kg (est.) |
The Volvo B 30 E was used exclusively across Volvo's 260 Series platform with longitudinal mounting. This engine received no significant platform-specific adaptations but was paired with different transmissions (M46, BW55) depending on model and market. All applications are documented in OEM technical bulletins.
The B 30 E's primary reliability risk is D-Jetronic fuel injection system failure, with elevated incidence in high-mileage or damp-condition vehicles. Volvo service data indicates this was a frequent cause of drivability complaints, while owner club surveys highlight cooling system issues as a secondary concern. Electrical system neglect and infrequent maintenance make regular inspection and fluid service critical.
Analysis derived from Volvo technical bulletins (1975-1980) and Volvo Owners Club failure statistics (2010-2023). 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
The B 30 E can be reliable long-term if its complex D-Jetronic fuel injection system is properly maintained. The mechanical engine itself is robust. With regular oil changes, cooling system maintenance, and attention to the fuel injection electronics, these engines can easily surpass 200,000 miles. The D-Jetronic system is the primary point of failure.
The most critical issue is D-Jetronic fuel injection system failure (sensors, ECU, wiring). Other common problems include cooling system leaks causing overheating, ignition system component wear (distributor, coil, wires), and oil leaks from aged gaskets and seals. These are well-documented in Volvo service manuals.
The B 30 E was used exclusively in the Volvo 260 Series, including the 262, 264, and 265 models from 1975 to 1980. It was never fitted to the 240 Series or earlier models, which used four-cylinder engines or the carburetted B30.
Yes, but it's complex due to the D-Jetronic system. Common upgrades include fitting a performance camshaft, larger valves, a free-flow exhaust, and increasing the compression ratio. Converting to carburettors or a modern fuel injection system is also popular for simplicity and increased power potential.
Fuel economy is modest for a 3.0L inline-six. Expect around 15-18 mpg (imperial) in mixed driving for a 264 sedan. Highway cruising can yield up to 22 mpg, while city driving may drop to 12 mpg. Economy is heavily influenced by the condition of the D-Jetronic system and driving style.
No. The Volvo B 30 E is a non-interference engine. If the timing chain were to fail (an extremely rare event), the pistons and valves would not collide, preventing catastrophic internal damage.
Volvo originally specified SAE 10W-40 mineral or semi-synthetic oil. A good quality 10W-40 is still recommended for these engines. For high-mileage engines, a high-mileage formulation can help condition seals and reduce oil consumption.
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)
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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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