That 4.2 cylinder and the related 5.8, 3.2 and 2.4 Sachs / Dohlmer / Mahle cylinders are some of the best in the industry when it comes to quality. If yours failed it is a fluke happening and not the norm. A very quick visual inspection and run your finder around the top of the cylinder bore will tell you in short order whether there is a problem in that area.