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No shims used
Generally there will be a shim on the outboard pad. It's not something you add, it will be on the pad when you take it out of the box. Tin shield clipped on or a full face one that's stuck on. Some higher end pads like a Wagner thermoquiet drill right through the backer and use pad material as the shim. Missing a needed shim off the outboard pad can definitely cause a click upon initial pedal push.
Post up what the shop says.
 

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Discussion Starter #22
Car did not make this noise until recently. Drove many years without this noise - albeit, I drive maybe 500 to 1000 miles a year tops.
 

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Discussion Starter #23
Yeah - never had shims. It was already a bit of a tight fit. Had to compress the piston fully to get pads on.
 
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