Volvo B16 engine
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The B16A and B16B Volvo engines (single carb and twin carbs respectively) were a 1600cc development of the B14A which in turn was sired by the B4B. These engines were fitted to the PV444 in its final two years (1957 and 1958), the Volvo PV544 in its 1958 introduction, as well as the companion estate and van versions known as Volvo P445, Volvo P210, and Volvo Duett. A new Volvo automobile intruduced in 1956, known in some markets as the Volvo Amazon or Volvo 122 was the first production Volvo to sport this engine in any significant number although some of the later examples of the short-lived Volvo P1900 were also fitted with them. Other applications of this engine found use in marine, industrial and agricultural settings. The Volvo BM T425 tractor is one such example of a non-automotive use for the B16.
The appearance of the B16 was not unlike its predecessor the B14. The block and cylinder heads bore no particular difference at a glance. The B16B sported twin SU HS4 carbs, notably larger in size than the B14A's HS2 carbs. Also the remote oil filter attached next to the water pump on the ignition distributor side of the engine on the B14 had been relocated to a housing under the intake and exhaust manifold side on the B16. The exhaust manifold which dumped centrally on the B14 now was made to exit towards the rear of the B16 manifold.
In automotive applications the B16 was featured from 1957 to 1961 model years although in marine and industrial applications it was used for a number of years after. It was replaced in 1962 model year cars by the 5 main-bearing B18 engine of 1.8 liters which had been first seen by the automotive public in the 1961 Volvo P1800 sports car. With the discontinuation of the B16 also came the end 6 volt electrical systems in Volvo cars.