Cummins ISC 350hp Valve Adjustment Schedule
I have a cummins ISC 8.3 350 hp engine. I know on Cats, they recommend a valve adjustment at 30,000 miles. What is the schedule for the ISC. I'm just shy of 30,000 miles. Thanks Brian
Forum Discussion
supercub wrote:
I have just under 30K miles.........but it's 10 years old........how important is the 4 year interval? Why would you need to adjust the valves if the engine sat for 4 years........what could change. I can understand mileage or amount of hours the engine has run, but year? Should I have the adjusted with just 30k miles? and 10 years old?
Thanks
Brian
You have no need to adjust them until the miles build up. Time alone does nothing.
FWIW, I adjusted mine at 50K anyway and they were all well within. I adjusted them so they were all exactly the same but it didn't make any difference in performance, sound or fuel efficiency.
