I don't think it will do any good. I can't get any pressure to hold. It goes away immediately after cranking. it is the same in all cylinders. I did hear air leaking from somewhere, seems like the block.
Would removing the rocker shaft, plugs, and cranking the engine with the compression gauge on a cylinder tell me anything? My thinking is all the valves would be closed, plugs out, so I would be narrowing things down to rings, valves, or cracks on individual cylinders.
If not, I will go buy a leak down device.
