Mechanic gave a listen to the engine and has a thought.
Happens warm or cold above a particular RPM (around 1700 right now) Sound is not at the ends of the engine Middle/center deep sound (listened from bottom)
He thinks it is definitely a connecting rod.
Ugh...
If this is the mechanic that did your seal I'd stay away from him. He is going to drain your dry with little fixes.
Second that!!!!
X 3
I'm a hobbyist. Not a professional. Don't be hatin'!