![]() ![]() This engine was versatile in that it was available for single or double-overhead camshaft configurations. A successor to Subaru’s EA engine, the EJ became a pillar in Subaru’s engine line with its 16-valve, horizontal flat-four cylinder design. The EJ20 is the second generation 2.0-liter Boxer engine produced by Subaru in 1989. The EJ20 engine seen in a 2006 Subaru Forester. He was the mind behind the 1966 Subaru 1000s EA52 engine, which measured 977 cubic-centimeters and was the first generation Boxer engine offered by Subaru. Shinroku Momose is regarded as the father of the Boxer engine in Japan. However, the only drawback to Subaru’s late model Boxer engines is it requires extensive costs for production and development. With the pistons laying flat in a boxer engine, it helps the vehicle run smoother as each time a piston cycles, the motion of the opposed pistons cancel out the vibration. These powerplants are now more compact, use minimal amounts of petroleum, and are environmentally friendly due to advances in engine technology.īoxer engines provide quick handling response and flat, confident cornering during spirited driving. Subaru has been producing Boxer engines for more than 40 years. Subaru continues to be a leading manufacturer with Boxer engines simply because it complements their vehicles better than any other configuration. According to Subaru, they have assembled in excess of 11 million horizontally opposed engines for the market worldwide. The assembly of a Subaru Boxer engine takes approximately 4-1/2 hours at the Subaru Plant in Gunma, Japan. #Boxer engine code#A QR code system is used to ensure top quality parts are being used during the production process. The piston heads are then assembled symmetrically from the crankshaft, which results in the engine being lower than a majority of the mechanical components that drive the automobile.Īngled split connecting rods bring the engine together with ease, but this takes twice as long to assemble since the heads are quite complex. ![]() The engine consists of several parts as the pistons are located on each side of the engine. After the aluminum block is initially cast, it is sent to a special assembly line where complex and expensive proprietary machines create intricate parts, which are etched with a QR code to ensure part number accuracy. ![]() With each opposing cylinder associated with its own crank throw in a Boxer engine, their axis is offset from one another, resulting in reciprocating torque.Ĭomplexity With Precision: How The Boxer Is Madeīoxer engines experience a complex production process that truly separates them from the pack. Inline and V-type engines cannot reproduce the same result without constructing complicated crankshaft counterweight and dampening systems. A Boxer engine’s vibrations are essentially negated by the side to side movement of the pistons, reciprocation, and ignition forces. Since the V-type engine configuration is theoretically not good in balance, they decided to adopt the Boxer engine setup, which has good inherent balance.”Ĭlick on the image to see Boxer pistons in motion.įurthermore, opposing banks of pistons in Boxer engines reach top dead center at the same time as compared to V-type engines where the piston movements alternate from bank to bank. As a result, the engineers needed to change the configuration. “On the other hand, with the longitudinal inline engine, it brings bad weight distribution from a long front overhang. “With a transverse engine layout, the length of driveshafts are different between right and left, requiring the use of a joint part, and in turn causes some vibration,” Infante said. Interestingly, previous models such as the Subaru 360 were rear-engine, rear-wheel-drive propositions.īeing the first production Subaru to utilize a Boxer engine, the engineers at Fuji Heavy Industries learned a considerable amount of information with the experiment. – Dominick Infante The Subaru 1000 was the first front-wheel-drive Subaru produced that was classified as a compact car by the Japanese government, which started in 1966. The biggest advantage is vehicle stability thanks to Subaru’s all-wheel drive layout, which is highly contributed by the Boxer engine. ![]()
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