All diesel engines do that to some extent or another.If you use them a lot then you have to adjust the valves.On Cummins engines I worked on that were in the 1980s you were supposed to set the valves at about 80,000 miles.Thats about every 6 to 8 months on a big rig.Newer valves seem to go a lot further before they need adjusting.I know they use real hard metal nowdays and probably have better stuff in the seats too,but the valves wear a groove in the face.Then they loose clearance.Other parts wear too.After a while the other parts need to be rebuilt too.They had bushings that could be replaced in the rockers and cam followers.Another thing is a few times I saw a cam wear a lobe off.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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