Cummins ISL valve adjustment interval
Reading my new-to-me Cummins manual and it says a top end service (valve adjustment) should be done on the ISL at 150,000 miles or 48 months. My rig is 6 years old but only has 36K miles. I am havin...
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I am waiting until the mileage interval. Those that I have talked to, indicate that when they did have the valve adjustment made, there was no adjustment needed.
