How do you Inspect chain rails

[Homeoboxter]

Originally Posted by JFP in PA

That only gives you a partial peek at two of the eight chain pads, you cannot even see the four large ones, or the two short ones on the short chain:

True, but the large ones last much longer, I don`t think those should be worn off at this mileage. You can`t see the lower small pad, I agree. This test is good to tell you if the upper is shot, and then you don`t have to hesitate to pull the cover off. I think you can have a vague idea about the condition of the large ones after removing the pump and the tensioners and looking down toward the crankcase with a camera or small mirror. The crank-to-IMS chain pad is partially visible after the RMS is removed, that also can give you a vague idea. In my engine at 100k the four long rails were in perfect condition, the crank-to-IMS pad was shot, and the four little pads were disintegrated and the chain was running on the tensioner, metal on metal.