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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Unless there's a loud clacking, don't mess with them. Even at the service interval, their probably won't be much adjustment needed.
