Whether the knee will make noise after ligament damage depends on the condition of the ligament damage. If it is an anterior cruciate ligament injury, generally the knee will not make noise. However, if the anterior cruciate ligament injury is combined with damage to the meniscus or cartilage, forming loose bodies, popping noises in the knee joint can occur. If there is damage to the medial or lateral collateral ligaments of the knee joint, which causes instability in the knee joint, this can also lead to popping sounds. If instability of the patella is caused by damage to the patellar ligament of the knee joint, changes in the alignment of the patellar joint during movement can also cause popping noises in the knee joint.