The Volvo B 16 A is a 1,583 cc, inline‑four petrol engine produced between 1957 and 1969. It features a cast‑iron block, overhead valves (OHV) actuated by pushrods, and a single downdraft carburettor. In standard form it delivered approximately 55 kW (75 PS), providing adequate power for Volvo's compact sedans of the era.
Fitted primarily to the Volvo Amazon (P1200/P1300 series) and PV 544 models, the B 16 A was engineered for durability and everyday reliability in varied conditions. Emissions controls were minimal for the period, with compliance based on prevailing national standards rather than unified regulations.
One documented service consideration is the potential for oil sludge accumulation in the timing chain case, highlighted in Volvo Technical Service Bulletin TSB‑001‑68. This issue, often linked to infrequent oil changes or low operating temperatures, could lead to timing chain tensioner failure. The design remained largely unchanged throughout its production run.
Production years 1957–1969 predate formal Euro emissions standards. Compliance was governed by national regulations applicable at time of manufacture (Swedish Transport Agency Historical Register).
The Volvo B 16 A is a 1,583 cc inline‑four petrol engine engineered for compact sedans (1957-1969). It combines a robust cast‑iron block with a simple OHV valvetrain to deliver dependable, if modest, performance. Designed for an era before formal emissions standards, it prioritizes mechanical longevity and serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,583 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, OHV, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.14 mm × 71.12 mm | |
| Power output | 55 kW (75 PS) @ 5,000 rpm | |
| Torque | 118 Nm @ 3,500 rpm | |
| Fuel system | Single downdraft carburettor (e.g., Zenith 32 NDIX) | |
| Emissions standard | Pre‑regulation (National Standards) | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | SAE 20W‑50 (Mineral) | |
| Dry weight | Not specified in available OEM docs |
The OHV design offers simplicity and ease of repair but delivers modest power by modern standards. Regular oil changes (every 5,000-8,000 km) with quality mineral 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. Carburettor tuning and ignition timing are key maintenance items for optimal running. Genuine or high-quality reproduction parts are recommended for rebuilds.
Oil Specs: Original specification was SAE 20W-50 mineral oil (Volvo Workshop Manual 1965). Modern high-detergent equivalents are often used.
Emissions: Formal Euro standards did not exist during production (1957-1969). Compliance was based on national vehicle regulations (Swedish Transport Agency).
Power Ratings: Measured under SAE gross horsepower standards common for the era (Volvo Technical Specification Sheet B16A).
Volvo Workshop Manual (1965 Edition)
Volvo EPC Archive Documentation (VEP-B16-001)
Volvo Technical Service Bulletin TSB-001-68
Swedish Transport Agency (Transportstyrelsen) Historical Vehicle Register
The Volvo B 16 A was used across Volvo's PV/Amazon platforms with longitudinal mounting. This engine received minor carburettor and manifold revisions over its lifespan, but no major facelifts created significant interchange limits. All adaptations are documented in OEM technical bulletins.
The engine code "B16A" 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 1205400. Visually, it is identified by its cast-iron construction, side-mounted distributor, and single downdraft carburettor on the intake manifold. Differentiation from the larger B18/B20 engines is by displacement and the specific casting numbers. Parts compatibility is generally high across all B16A production years, though carburettor types may vary.
The B 16 A'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-001-68 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 (1960-1970) and workshop manuals (1965). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-16-A.
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