Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 4 out of 8 cylinders have no compression › Reply To: 4 out of 8 cylinders have no compression February 28, 2020 at 10:53 am #940625 Richard KirshyParticipant 1 Slipped a cam on the timing belt 2 Cam cog possibly rotated