The Volvo B23ET is a 2,316 cc, inline‑four turbocharged petrol engine produced between 1982 and 1984. It features a cast iron block, aluminum head, and overhead camshaft (OHC) driven by a timing belt. This engine was Volvo's first mass — produced turbocharged petrol unit, delivering enhanced performance for its compact executive models.
Fitted exclusively to the Volvo 240 Turbo (242/244/245), the B23ET was engineered for spirited acceleration and overtaking capabil…
Production years 1982–1984 meet Euro 1 emissions standards (VCA UK Type Approval applicable for registered imports).
The Volvo B23ET is a 2,316 cc inline‑four turbocharged petrol engine engineered for performance sedans and wagons (1982-1984). It combines a single overhead camshaft with Bosch K-Jetronic fuel injection and a Garrett T3 turbocharger to deliver strong, linear power. Designed to meet Euro 1 emissions standards, it prioritizes mechanical robustness and driver engagement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,316 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 96.0 mm × 80.0 mm | |
Power output | 107 kW (145 PS) | |
Torque | 230 Nm @ 2,900 rpm | |
Fuel system | Bosch K-Jetronic mechanical fuel injection | |
Emissions standard | Euro 1 | |
Compression ratio | 7.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett T3 (non-intercooled) | |
Timing system | Toothed belt (interference design) | |
Oil type | SAE 10W-40 (Mineral or Semi-Synthetic) | |
Dry weight | 155 kg |
The Volvo B23ET was used exclusively across Volvo's 240 Turbo platform with longitudinal mounting. This engine was a homologation special for motorsport, receiving specific turbo, manifold, and ECU tuning. All adaptations are documented in OEM technical bulletins.
The B23ET's primary reliability risk is premature turbocharger failure due to inadequate cooldown or oil starvation. Volvo service data from the early 1980s indicates this was a frequent warranty claim, particularly in vehicles used for spirited driving without adhering to cooldown procedures. Urban driving with frequent short trips accelerates turbo wear, making strict adherence to operating procedures critical.
Analysis derived from Volvo technical bulletins (1982-1984) and workshop manuals (1982-1984). 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 B23ET can be reliable long-term, but its turbocharger is its Achilles' heel. With meticulous care, including strict adherence to cooldown procedures, using high-quality oil, and timely replacement of the timing belt, it can provide many years of enjoyable performance. Neglecting these items will lead to expensive repairs.
The most critical issues are turbocharger bearing failure (due to heat/oil issues), timing belt failure, and malfunctions in the K-Jetronic control pressure regulator. Exhaust manifold cracks are also a known issue. These are all well-documented in Volvo's original service literature.
The B23ET was used exclusively in the Volvo 240 Turbo models (242, 244, and 245) from 1982 to 1984. It was a limited-production engine created for homologation purposes and is a highly sought-after collector's item today.
Yes, it responds well to tuning. Common upgrades include fitting an aftermarket boost controller, upgrading the exhaust system, and re-jetting the K-Jetronic system. More significant gains are possible with an intercooler and a larger turbo, though this moves away from originality. Reliability requires balancing modifications with enhanced cooling and fueling.
Fuel economy is relatively poor due to the turbo and low compression. Expect around 11.0-13.0 L/100km (21-25 mpg UK) in mixed driving. Economy is heavily influenced by driving style; aggressive use of boost will significantly increase consumption.
Yes. The Volvo B23ET is an interference engine. If the timing belt fails, the pistons will collide with the open valves, causing severe internal damage that requires a major engine rebuild. This makes the timing belt replacement schedule absolutely critical.
Volvo originally specified SAE 10W-40 mineral or semi-synthetic oil. A high-quality semi-synthetic or full-synthetic 10W-40 that meets ACEA A3/B3 or equivalent specifications is strongly recommended for superior turbocharger protection and high-temperature stability.
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
Type-approval guidance and documentation.
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