Is it Knocking or Not???, could be a rod... maybe something else?? Options

[Bruce Allert]

I'd like to know what to look for when I take the 2.0 apart that was in Punkin. Since I've not gone into surgery of this kind I'm at a loss as to what I will see if it is a rod that was knocking.

When the engine was running a couple of us listened to it and proceeded to take a spark plug wire off one cylinder at a time to try to determine which one it was. We thought if the wire for the cylinder with the know was taken off it would cease to knock or quiet down which neither happened. Is this a way to find if it is a rod or which one it is???

.........b

[TimT]

anyhow, small end knock= tap tap tap

big end knock= thunk thunk thunk

big end know usually goes away as you raise revs, the rod floats on the increased oil pressure.

pulling the plug lead can help identify the offending cyinlder. Sometimes the knocking rod wil quiet down when no combustion pressure is driving that cylinder..

Oh and the bearing of the knocking rod will show copper or be hammered distorted somehow.