My tensioner is making a squeeking and rattling noise sometimes on startup. Weird, however, the tension on my belt is very tight to the point I believe it is too tight.

Reading this post, I've attached 2 pictures of what I believe are tensioners that would work on my car based on model year part lookup. Correct me if I'm wrong about applicability. Right one is an SKF and the Left one is Dayco. The interesting thing about the Dayco is the decription:

DAYCO BELT TENSIONER -- Automatic Belt Tensioner, The Featured Patented Flat Spring Design Reduces The Risk Of Accessory Bearing Failure, Reduces The Risk Of Belt Squeal And Slippage, Or Poor Accessory Performance Caused By Low Tension, The Flat Spring Is Coated To Resist Rust, Heavy Duty Cast Aluminum Spring Case Resists Cracking, Heavy-Duty Cast Aluminum Arm Offers Additional Strength And Less Distortion

Is the "Flat Spring Design" what has been mentioned as what would be an improved design or is this the same design as the original?

Attached Thumbnails