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, effortless cruising and executive comfort. Emissions compliance was achieved through fuel injection and exhaust gas recirculation (EGR), allowing most units to meet early US federal standards, though formal Euro standards were not yet established.
One documented service concern is failure of the D-Jetronic fuel injection system's pressure sensor or ECU, potentially leading to poor running or no-start conditions. This issue, highlighted in Volvo Service Bulletin 30E‑06, is often linked to electrical connector corrosion or component aging. The engine was succeeded by the B28 and B28E engines, which featured reduced displacement for improved fuel economy.
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 inline-six design provides exceptionally smooth operation ideal for highway cruising but requires attention to the complex D-Jetronic fuel injection system. SAE 10W-40 oil is recommended. The D-Jetronic system is sensitive to electrical connections and sensor failure; inspect wiring and connectors per Volvo SB 30E-06. The timing chain is generally durable but should be inspected for stretch at high mileage. No formal emissions compliance mandates unleaded fuel, but it is recommended for catalytic converter-equipped models.
Oil Specs: Requires SAE 10W-40 specification (Volvo Workshop Manual 1978). Modern semi-synthetics are generally acceptable.
Emissions: Formal emissions certification is not applicable for vehicles of this era (EU Regulation (EC) No 715/2007).
Power Ratings: Measured under SAE net horsepower standards (post-1972). Figures represent engine output with accessories (Volvo Technical Data Sheet 1976).
Volvo Workshop Manual (1978 Edition)
Volvo Technical Data Sheet (1976)
Volvo Service Bulletin 30E-06
SAE International: J1349 Engine Power Test Code
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.
Locate the engine code stamped on a flat pad on the left-hand side of the engine block, just below the cylinder head (Volvo Workshop Manual 1978). The code will read "B30E". Visual identification: Cast-iron block, long inline-six configuration, distinctive rectangular rocker cover, and Bosch D-Jetronic fuel injection components (air flow sensor, ECU, injectors) mounted on the intake manifold. Critical differentiation from the B30: The B30E has electronic fuel injection, while the B30 uses carburettors. The presence of an ECU and wiring harness confirms the B30E.
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.
Find answers to most commonly asked questions about VOLVO B-30-E.
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DVLA: Engine Changes & MoT
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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.
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