The Volvo B 230 G is a 2,316 cc, inline‑four petrol engine produced between 1985 and 1995. It features a cast‑iron block, overhead camshaft (OHC) driven by chain, and a Bosch LH‑Jetronic electronic fuel injection system. In standard tune for the 740/940 series, it delivered approximately 86 kW (116 PS), prioritizing durability and smooth, linear power delivery over outright performance.
Fitted primarily to the Volvo 740 and 940 series sedans and wagons, the B 230 G was engineered for reliable, everyday transportation with an emphasis on longevity and ease of maintenance. Emissions compliance for North American and European markets was achieved through precise electronic fuel metering and catalytic converters, meeting US Federal and Euro 1 standards applicable for its production period.
One documented service consideration is the potential for oil sludge accumulation in the timing chain tensioner cavity, particularly in vehicles subjected to frequent short trips. This issue, noted in Volvo Technical Service Bulletin TSB‑87‑02, can lead to premature tensioner wear and chain noise. The engine received minor updates, including revised cylinder head porting, throughout its long production run.
Production years 1985–1992 meet US Federal standards; 1993–1995 models meet Euro 1 emissions standards (Swedish Transport Agency Type Approval Records).
The Volvo B 230 G is a 2,316 cc inline‑four petrol engine engineered for large sedans and wagons (1985-1995). It combines a robust cast‑iron block with a single overhead camshaft and Bosch LH-Jetronic electronic fuel injection to deliver smooth, predictable power. Designed to meet contemporary US Federal and Euro 1 emissions regulations, it prioritizes mechanical longevity and serviceability over high performance.
| 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 | 86 kW (116 PS) @ 5,400 rpm | |
| Torque | 185 Nm @ 2,700 rpm | |
| Fuel system | Bosch LH-Jetronic electronic fuel injection | |
| Emissions standard | US Federal / Euro 1 (market-dependent) | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | SAE 10W‑40 (Mineral/Synthetic blend) | |
| Dry weight | Not specified in available OEM docs |
The SOHC design offers simplicity and ease of repair. The LH-Jetronic system is generally reliable but sensitive to poor electrical grounds and aged sensors. Regular oil changes (every 10,000 km) with quality oil are critical to prevent sludge buildup in the timing case, which can starve the tensioner. The engine thrives on consistent use; prolonged idling or very short trips should be minimized. Genuine or high-quality reproduction parts are recommended for rebuilds.
Oil Specs: Specification is SAE 10W-40 (Volvo Workshop Manual 1990). Modern high-detergent multi-grade oils meeting API SF/CC or better are suitable.
Emissions: Complied with US Federal standards (pre-1993) and Euro 1 (1993-1995) (Swedish Transport Agency).
Power Ratings: Measured under SAE net horsepower standards (Volvo Technical Specification Sheet B230G).
Volvo Workshop Manual (1990 Edition)
Volvo EPC Archive Documentation (VEP-B230-001)
Volvo Technical Service Bulletin TSB-87-02
Swedish Transport Agency (Transportstyrelsen) Type Approval Records
The Volvo B 230 G was used across Volvo's 740/940 Series platforms with longitudinal mounting. This engine received minor emissions control revisions over its lifespan, but no major facelifts created significant interchange limits for core components. All adaptations are documented in OEM technical bulletins.
The engine code "B230G" is typically stamped on a flat pad on the left-hand side of the engine block, near the distributor. The casting number for the block is often 1235400. Visually, it is identified by its cast-iron construction, overhead camshaft cover, and the Bosch LH-Jetronic ECU and associated sensors. Differentiation from the carburetted B230 or fuel-injected B230F is by the specific engine code and the electronic fuel injection components.
The B 230 G's primary long-term concern is oil sludge accumulation in the timing chain case, particularly in vehicles subjected to infrequent use or short trips. Volvo TSB-87-02 documented this as a cause of premature tensioner wear. Consistent operation and strict adherence to oil change intervals are critical for preventing costly internal damage.
Analysis derived from Volvo technical bulletins (1985-1995) and workshop manuals (1990). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-230-G.
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