tag:blogger.com,1999:blog-6699636236399143012.post8294308560976978671..comments2009-08-18T21:44:03.674-04:00Brianhttp://www.blogger.com/profile/16324210420598306463noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-6699636236399143012.post-65428860980131941882009-08-18T21:44:03.674-04:002009-08-18T21:44:03.674-04:00Thanks, Mike!Brianhttp://www.blogger.com/profile/16324210420598306463noreply@blogger.comtag:blogger.com,1999:blog-6699636236399143012.post-31672362912749626612009-08-18T21:41:02.188-04:002009-08-18T21:41:02.188-04:00Brian-<br /> There are 12 of them and they are not flow matched. they are leak rate tested. as the engine heats up the cylinders expand and thus the hydraulic lifters must pump up or expand to make up for the increased distance between the cam follower and the rocker arm. as you reduce power, and enter downwind for landing the engine experiences sudden cooling, the cylinders contract, and as such the the lifters must be able to contract (or leak down) at an optimum rate. mike peoriaAnonymousnoreply@blogger.com