Originally Posted by
Joe_Black
Sand you don't need to worry about, but you likely picked up a rock that's gotten wedged in the caliper. Do the simple thing and pull the wheel and look at it, more than likely you can pop the rock out with a screwdriver or some other type of small lever. Worse-case scenario you'll need to drop the caliper to get it out.
But you do need to to visually inspect just in case a pad's come apart.
+1
I left the beach years ago and had the same issue. Used the pressure washer at a car wash at the beach and still had some grinding. Ended up borrowing some tools from a good-old-boy NASCAR camper next to me and found a few busted up "sea shell bits" lodged in both front calipers and in the rotor shields. Luckily the shells were soft enough that they could do no damage, but the noise was still god awful.
Gary Noonan
'01 S/C VX / '18 Forester XT