Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2000 Jeep TJ engine knock › Reply To: 2000 Jeep TJ engine knock June 8, 2020 at 12:00 pm #957204 Richard KirshyParticipant Could be piston slap or Rod knock. (not uncommon) Look it up on youtube for examples If either are the case, there is no cure in a can. A tear down and inspection would be required to confirm. In many cases a engine swap is a likely solution.