Dickensheets Posted October 6, 2009 Share Posted October 6, 2009 I'm looking at a brand new impreza 5 door. What is this i-active valving stuff?? Does it break easy? Anyone have bad experience with this model of car? Ryan Quote Link to comment Share on other sites More sharing options...
Dickensheets Posted October 6, 2009 Author Share Posted October 6, 2009 A little nudge..teeny one Quote Link to comment Share on other sites More sharing options...
Dickensheets Posted October 6, 2009 Author Share Posted October 6, 2009 Nevermind. I wikipediaded it. Sounds cool. And if it breaks you are stuck in economy mode which is ok for me. Quote Link to comment Share on other sites More sharing options...
The Dude Posted October 6, 2009 Share Posted October 6, 2009 (edited) A little nudge..teeny one I have an 06 Forester. I am fairly certain that 05 was the first year for the i-active valve. Basically, it's two position valve timing. Motor oil under pressure is used to shift the cam from its' "normal" timimg position to an "advanced' timing position. So, the system has been used in the US going on five years. I read this board every day, I can not recall one adverse post on i-active timing. It does not appear to be a problem. Edited October 6, 2009 by The Dude Quote Link to comment Share on other sites More sharing options...
OB99W Posted October 6, 2009 Share Posted October 6, 2009 Nevermind. I wikipediaded it. [...]i-AVLS description from the horse's mouth: http://www.drive.subaru.com/Spring07_whatmakes.htmAt the bottom of the article is a link to AVCS info, too. Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted October 6, 2009 Share Posted October 6, 2009 Same idea as Vtec. Quote Link to comment Share on other sites More sharing options...
subaru360 Posted October 6, 2009 Share Posted October 6, 2009 The only problems I have heard of with the system is if you don't change the oil the filter screens before the solenoids clog up. Quote Link to comment Share on other sites More sharing options...
RallyKeith Posted October 7, 2009 Share Posted October 7, 2009 This explains alot. When I bought my '06 2.5i I had just assumed this was same system as used on the STi motors. It defenitely is not. The STi motor actually have variable valve timing with the cam gear "floating" in reference to the cam and it uses oil pressure to variabley advance and retard the cam at will. Oh well.... Quote Link to comment Share on other sites More sharing options...
torxxx Posted October 7, 2009 Share Posted October 7, 2009 GM uses this on some of their new engines. the 4200 6 cylinder in the Envoy uses this technology and its a great idea. It controls cam timing for more performance. So you have the PCM controlling ignition timing (when the spark happens) and then the valve timing is adjusted basically controlling when the valves open and close. it doesnt make the duration longer, but it will open the intakes sooner and close the exhausts later. Quote Link to comment Share on other sites More sharing options...
nipper Posted October 7, 2009 Share Posted October 7, 2009 http://www.drive.subaru.com/Win05_WhatsInside.htm nipper Quote Link to comment Share on other sites More sharing options...
Danbob99 Posted October 7, 2009 Share Posted October 7, 2009 It's no fun to work on. :/ Quote Link to comment Share on other sites More sharing options...
PlaneDriver Posted October 8, 2009 Share Posted October 8, 2009 Does any current Subaru come with both i-Active Timing and AVCS? Quote Link to comment Share on other sites More sharing options...
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