Leakdown Testing

FED 387 · 10-04-2012, 12:05 PM

usually somewhere either on the gauge or in the instructions it will give you a range of air pressure needed so that the gauge will function properly----my particular gauge is a Sun it ranges from 70-200 pounds needed----turn the engine to a position where BOTH rocker arms have NO tension on them so that the neither of the valves are open at all-- then go do your test---we pump air into the cylinder , disconnect the air line to that cylinder then re- attach the air hose and take the reading--works for us just remember to do your routine the EXACT same way every time--- hot ,cold, medium temp engine odd numbers first whatever how ever it works best for you

10-04-2012, 12:05 PM	#9
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 530 Liked 333 Times in 180 Posts	Re: Leakdown Testing usually somewhere either on the gauge or in the instructions it will give you a range of air pressure needed so that the gauge will function properly----my particular gauge is a Sun it ranges from 70-200 pounds needed----turn the engine to a position where BOTH rocker arms have NO tension on them so that the neither of the valves are open at all-- then go do your test---we pump air into the cylinder , disconnect the air line to that cylinder then re- attach the air hose and take the reading--works for us just remember to do your routine the EXACT same way every time--- hot ,cold, medium temp engine odd numbers first whatever how ever it works best for you