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 capability, marking a significant step in Volvo's performance heritage. Emissions compliance was managed through Bosch K-Jetronic fuel injection and an early catalytic converter, meeting Euro 1 standards for its production era.
One documented service consideration is the susceptibility of the early turbocharger (Garrett T3) to premature bearing wear under sustained high boost, as noted in Volvo Service Bulletin #SB-82-05. The engine was succeeded by the intercooled B230ET in 1985 for improved reliability and power.
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 turbocharger provides a strong surge of mid-range torque but requires a 30-second idle cooldown after hard driving to prevent oil coking in the turbo bearings. SAE 10W-40 oil is critical for its high-temperature stability. The low 7.5:1 compression ratio allows safe operation on regular unleaded fuel but demands precise K-Jetronic calibration. Strict 50,000 km timing belt replacement is mandatory to prevent catastrophic failure.
Oil Specs: Requires SAE 10W-40 specification (Volvo Owner's Manual 1983). Modern synthetics meeting ACEA A3/B3 are suitable and recommended for turbo protection.
Emissions: Certified to Euro 1 standards for all production years (1982-1984) (VCA UK Type Approval applicable for registered imports).
Power Ratings: Measured under SAE net horsepower standards (post-1972). Output is specific to the non-intercooled B23ET (Volvo Workshop Manual 1982).
Volvo Workshop Manual (1982 Edition)
Volvo Owner's Manual (1983)
Volvo EPC Archive: Doc. VEP-23ET-82
Volvo Service Bulletin #SB-82-05
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.
Locate the engine code stamped on the flat pad atop the block, just below the cylinder head on the exhaust manifold side (Volvo Workshop Manual 1982). The casting number for the B23ET block is 'B23'. Visual identification: Features a single overhead camshaft cover, Bosch K-Jetronic fuel distributor, a prominent Garrett T3 turbocharger on the exhaust manifold, and a boost gauge in the instrument cluster. Differentiate from the later B230ET by the absence of an intercooler and its unique early turbo configuration.
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.
Find answers to most commonly asked questions about VOLVO B-23-ET.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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