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Conventional civilian alternator bracket for the 8.3L. This is about a $100 from any Cummins dealer. Can occasionally be found for less on eBay.

Make sure it is not just water vapor boiling out. I'd do a compression or leak-down test on all 6 cylinders before you rip the engine apart. The compression testing tool is only like $20 to buy, it is a hollowed out injector body with a quick connect on the end. I have a new one I would loan...

I think you have an injector stuck open from heating them or lash too tight on rockers. Fuel usually helps to keep them cool. Turned up fuel really only comes into play on transitions and then wide open throttle (total rack travel). If you only adjusted the top fuel screw, that is just...

Not sure, I removed the entire thing from an 8.3L that it was on. Pump, gear, nut, pump brace, and injector lines. Was going to use it then tripped over the ISL. Rare for a pump to be bad, especially on just one cylinder. Will be interesting to see the cause of this. Could do a...

Bolts right up as long as it is from an 8.3L. The 5.9L ones will also fit and work, but utilize an external oil supply line. Easy either way. P pump can exceed 400hp of fuel flow in near stock trim.

Anything can happen. Could very well be an injector as mentioned. There have only been a couple of pump failures here, but they typically result in a no start. You can have a shop verify the pump flow across all 6 cylinders for like $200, includes setting the injection timing to any new spec...