Originally Posted By Cab_Burge
Originally Posted By buildanother
as long as you're certain that it is set to fire #1 with timing mark lined up at top dead center and not set to fire cyl # 6 which also lines up the same way.

If you align the timing tab on zero with the timing mark on the balancer align with the tab on #1 it will not leak out of the valves very much, if it is align on #6 it won't hold any pressure at all due to it having both valves opened on #1 overlap stroke with #6 on the firing stroke shruggy work
Either way if it isn't on #1 TDC on the firing stroke you can move the hose to the other cylinder at TDC on the firing stroke (#6) and start testing from there work up


I just tried to do the test and I must be doing something wrong. I have #1 at TDC. Checked with a tool and harmonic balancer is lined up with zero. I tested #1 first and have 45% leakage. I hear a hissing in the opposite valve cover on the passenger side and can feel air coming out of the breather hole. So I moved over to #6 and same result 45% hiss and air on the same side. Thoughts?

1970 EK2 T/A 727