page_title: Subaru six-cylinder engines
section_title: EZ30D mk II
hierarchical_section_title: Subaru six-cylinder engines / EZ30 and EZ36 / Design / EZ30D mk II
caption_attribution_description: English: Switching tappet for SUBARU EZ30 engine by INA (Schaeffler group) at Tokyo Motor Show 2005. 日本語: スバルEZ30エンジン用スイッチングタペット。シェフラーグループのINA製。東京モーターショー2005にて。
context_page_description: The Subaru six-cylinder engines are a series of flat-6 engines manufactured by Subaru, a division of Fuji Heavy Industries, made in three distinct generations. The ER27, derived from the Subaru EA first-generation flat-4, was used as the sole engine option in the premium model 1988–91 Subaru Alcyone VX. The EG33, derived from the Subaru EJ second-generation flat-4, was used exclusively in the successor Subaru Alcyone SVX, again as its sole engine option, sold from 1991–96. The EZ series, consisting of the EZ30 and EZ36 models, was designed to be almost as compact as the EJ25 flat-4. The EZ30/36 were the first Subaru six-cylinder engines available outside the sport coupes, used as the uplevel option for Subaru Legacy and Outback/Lancaster as well as the sole option in the Subaru Tribeca.
context_section_description: For the 2004 model year, the EZ30 was revised to add the Subaru active valve lift system to the intake cam, providing both variable valve timing and lift for the intake valves, which resulted in increased power, torque, and economy. The cylinder heads for the EZ30D mk II were also revised to include three exhaust ports per head instead of the single exhaust port used in the original EZ30D mk I, which gathered the exhaust from each cylinder bank into a single port. Other detail improvements included a new block casting and a reduction in overall weight by 8.91 kg (19.6 lb), achieved through the use of hollow-journal camshafts, reducing the number of bolts in the timing chain cover, and switching to a plastic intake manifold.
caption: Cutaway of switching tappet for Subaru AVLS fitted to EZ30D mk II
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