Volvo S80 B6294S 2.9L Petrol Engine For Sale

Volvo S80 B6294S 2.9L DOHC 24-Valve Inline-6 Petrol Engine

Refined and Reliable naturally aspirated power unit, Used engine For Sale

The Volvo S80 B6294S 2.9L Petrol Engine is a refined and reliable naturally aspirated power unit designed to deliver smooth performance and long-term durability in Volvo’s premium executive vehicles.

As part of Volvo’s white-block inline-six engine family, the B6294S is a balanced operation, quiet running characteristics, and solid build quality. This engine is a popular option in the used market for buyers seeking an OEM-correct replacement that prioritizes comfort and reliability over forced-induction complexity.

This 2.9-liter naturally aspirated petrol engine features an inline six-cylinder configuration, dual overhead camshafts (DOHC), and 24 valves for efficient airflow and smooth power delivery. With a displacement of 2,922 cc, it typically produces around 196 horsepower (144 kW) and approximately 280 Nm of torque, offering effortless acceleration and excellent highway cruising capability.

The engine utilizes a timing belt-driven camshaft system, multi-point fuel injection, and an aluminum cylinder head paired with a robust engine block for strength and longevity.

The B6294S engine fits the Volvo S80 (first generation) and also however selects  Volvo V70 and XC70 models depending on market and production year. Its compatibility with both automatic and manual transmissions makes it a flexible choice for direct replacement and restoration projects.

Designed for smoothness and refinement, this inline-six engine complements Volvo’s luxury-focused platforms by delivering consistent, vibration-free performance.

 Specifications, Common weaknesses and Maintenance.

Although generally reliable, the B6294S has some common weaknesses associated with age and mileage. These may include oil leaks from camshaft or crankshaft seals, PCV system blockages leading to increased crankcase pressure, and cooling system wear such as failing thermostats or radiators. Like many belt-drive engines, timing belt neglect can result in serious internal damage if we forget replacement intervals.

Maintenance notes are straightforward but essential. Regular synthetic oil and filter changes, timely timing belt and water pump replacement, and routine inspection of the PCV and cooling systems are strongly recommended. When properly maintained, the Volvo B6294S 2.9L petrol engine delivers smooth performance, dependable reliability, and excellent value for Volvo S80 and related models.