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			if there is a pebble caught somewhere you should easily be able to see score marks on the rotating part.  If you don't see anything on the outer or inner brake rotor surface, it may be all the way on the inside surface of the strut carrier adjacent to the outer CV joint
		 
				__________________07 Porsche Cayman S speed yellow
 87 Porsche 924S Carrera GT project/ 951 engine transplant
 2015 BMW X5
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