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Started to say that I had pulled the liner on a Mack 300 , then I remembered that I just pulled the piston, valve punched a hole in the top of piston, due to some one trying make an R model Mack with a 300 hp 5 speed tranny run 85 MPH . One piston and several cylinder heads later that some one...

Regarding the liners in the class 8 engines, their purpose is to make a rebuild of that engine possible, due to cavitation effects on cylinder walls ? or just cheaper, ?

Not tail gating, having said that, I know at times it is difficult to maintain a safe following distance even with proactive awareness of the traffic around your truck. jimmy