Sorry, gonna have to disagree with you. I have grown up around trucks, driven them and maintained two decent sized fleets. Our 2001 Western Star has a 500HP 60 series detroit in it that has not been cracked open at 985,000 miles, still runs like a top, blowby is starting to increase so will probably get a liner kit around 1,000,000 or so miles, tranny is getting loose anyway. The W900B Kenworth I drove before that had a 475HP 3406E cat with 780,000 miles, never been opened. My old mans `76 Pete with a 400 Cummins had 600,000 on it when he sold it.
There are lemons out there, but if properly maintained, big diesels will last a long time. In my experience, I don`t trust the newer engines that are making over about 500HP to last nearly as long as the lower-rated engines. I would never own a truck with one of the newer emissions engines in it, or one of the new 550-650HP hot-rods. Most of the ISX cummins I have been around have EGR issues, and most have been rebuilt by 450,000 and some don`t make it that long, same with the newer CAT and detroit motors. I think we are just trying to push too much power out of a given displacement, and the same thing applys to newer pickup diesels. That is why if I get a diesel pickup, it will have a P-pumped 12 valve cummins in it, and it will not get turned up.
And you are right that big rigs get run longer every time they fire up, that makes a big difference in longevity, and that will have an effect on a pickups lifespan if it is used to go get groceries.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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