mechnical temp gauge

I know... I got it from Summit and it was cheap enough. It only works when I wiggle it at the fitting where it goes into the block, ( 225 slant). It has the correct brass fitting.
I bought it last year and it sat on the shelf for ever before I installed it.

I guess where the wire goes into the part that reads the temp must be defective. I wiggle it at the gauge and has no effect.

I know, order another one and pay a few $$ more! No other remedy?

Any pictures of where you wiggle it can help us try to answer your question.
can you provide the summit part number so we can look at the spec sheet.
Thanks