Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Brake caliper guide pins not seated properly › Reply To: Brake caliper guide pins not seated properly May 25, 2021 at 5:47 pm #990714 Ceylon ChenParticipant Great, thanks for the clarification! I did not know that they have to be seated fully inside the caliper holes, looks like the one that bounces back has too much air trapped inside.