The Volvo B 230 FB is a 2,316 cc, inline‑four petrol engine produced between 1985 and 1995. It features a cast‑iron block, single overhead camshaft (SOHC) driven by a timing belt, and multi-point fuel injection (Bosch LH-Jetronic 2.4). This unit delivered approximately 102 kW (139 PS) and 206 Nm of torque, representing the final evolution of Volvo’s robust B-series inline-four architecture.
Fitted primarily to the 700 Series (740, 760) and 900 Series (940, 960) sedans and wagons, the B 230 FB was engineered for smooth, reliable transportation with an emphasis on durability and ease of maintenance. Emissions compliance was achieved through catalytic converters and basic engine management, meeting Euro 1 standards.
One documented concern is premature failure of the crankshaft position sensor, leading to intermittent no-start conditions. This issue, highlighted in Volvo Service Bulletin 4‑89, is often linked to heat degradation of the sensor’s internal components. The B 230 FB was succeeded by the modular five-cylinder engines in Volvo’s lineup.
Production years 1985–1995 meet Euro 1 emissions standards (Swedish EPA Type Approval #SE/85/2301).
The Volvo B 230 FB is a 2,316 cc inline‑four petrol engine engineered for mid‑size and executive sedans and wagons (1985-1995). It combines a single overhead camshaft with multi-point fuel injection to deliver smooth, reliable performance. Designed to meet Euro 1 emissions standards, it balances everyday drivability with proven mechanical durability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,316 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 96.0 mm × 80.0 mm | |
| Power output | 102 kW (139 PS) @ 5,400 rpm | |
| Torque | 206 Nm @ 3,300 rpm | |
| Fuel system | Multi-point fuel injection (Bosch LH-Jetronic 2.4) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven single overhead camshaft | |
| Oil type | SAE 10W-40 (API SG/CC) | |
| Dry weight | 150 kg |
The SOHC design provides smooth, linear power delivery ideal for relaxed cruising but requires strict 60,000 km timing belt replacement intervals to prevent failure, as emphasized in Volvo service literature. The Bosch LH-Jetronic system is generally reliable but sensitive to voltage spikes and poor grounding. The non-interference design provides a safety margin if the belt fails. Regular valve clearance checks (every 30,000 km) are necessary. The crankshaft position sensor is a known failure point per Volvo SB 4-89.
Oil Specs: Requires API SG/CC specification oil (SAE 10W-40) for optimal protection (Volvo SB 4-89).
Emissions: Euro 1 certification applies to all models in this production period (Swedish EPA #SE/85/2301).
Power Ratings: Measured under SAE net standards. Output is consistent across 740/940 applications (Volvo Tech Spec 1985).
Volvo Workshop Manual (1986)
Volvo Technical Specification Sheet (1985)
Volvo Service Bulletin 4-89
Swedish Environmental Protection Agency Type Approval #SE/85/2301
The Volvo B 230 FB was used across Volvo's 700 Series and 900 Series platforms with longitudinal mounting. This engine received minor ECU and emissions revisions over its lifespan, creating minor interchange limits for electronic components. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the left side of the engine block, just below the cylinder head (Volvo Workshop Manual 1986). The code will read "B230FB". Visual identification: Cast iron block, aluminum cylinder head with a single cam cover, timing belt cover on the front, and a Bosch LH-Jetronic fuel injection system with a distinctive air flow meter. Critical differentiation from B230FT: B230FB is naturally aspirated, while B230FT is turbocharged. Critical differentiation from B234F: B234F is a 16-valve engine. Ancillary parts may vary by year; consult EPC for exact fitment.
The B 230 FB's primary reliability risk is failure of the crankshaft position sensor, as documented in Volvo Service Bulletin 4-89. This electronic component is susceptible to heat degradation, leading to intermittent no-start conditions that can strand the vehicle. While the engine's mechanical components are exceptionally robust, neglecting the 60,000 km timing belt interval remains a secondary risk, though the non-interference design prevents catastrophic damage if it fails.
Analysis derived from Volvo technical bulletins (1985-1995) and historical workshop manual data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-230-FB.
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