Timing Belt Tensioner + Squeak Problem

[homegrown2nr]

Can the timing belt tensioner squeak???

BTW
The squeak is constant.
It doesn't get worse or better when you rev the motor.
Tried some belt dressing on the serpentine = no effect. 28K on Timing and Serpentine belts.
Recently replaced head.
Also in the timing belt tensioner the little arrow isn't exactly in the middle of the window

Any help will be greatly appreciated as usual.

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