So over the winter my car developed a popping noise. I diagnosed it to a bad right side strut mount bearing. I saved the pennies and bought the spohn strut mounts since I take the cornors hard.

After install of these, my popping went away, but now I have a knocking on the left front. Now before I contact spohn n ask for an exchange, I would like to make sure its not other parts on my car.

removed and reinstalled upper mount
I have replaced the ball joints about 2.5 years ago.
Just rechecked and greased the ball joints, good.
Checked my wheelbearings, tightened it down 1 more notch.
Control arm bushings replaced when ball joints replaced.
All brake hoses mounted down.
Both pins are in brake caliper.(had this happen before, sounds diff)
I took dental tools and checked to see if maybe the strut mount had some play where the piviot ball is pressed in. None I could see.
Struts were taken off my old car, and installed on this one. They are about 4 years old, but still have plenty of push behind them (kyb's btw)

What else do I need to check?

is the strut body hitting the lip around the opening in the shock tower when the suspension is compressed?

I'll check that tonight after work.

With car on the ground, I can easly slide my hand between struts and spring purch.

Plenty of space in the opening up top.