I called those $8 Amazon borescope cameras junk until I found a cracked valve with one
A guy in my shop kept pushing me to try one and I figured it was just a toy, but I finally caved and the thing showed me a burned exhaust valve on a 2013 Focus without pulling the head. For less than the cost of a gasket set, it paid for itself on the first job. Anyone else using these cheap cameras for diag work, and how long do the cables actually last?