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Pulled exhaust off - straight pipe and muffler. No change (well, louder!). Did not pull J-pipe but peered inside and it is sooty but otherwise looks un-obstructed. I have a flapper on the stack, so what I needed to check was whether some muffler innards had come loose and blocked the exhaust. It...

Pulled hose coupler off the turbo. All vanes there, no in-out play, a tad lateral play (just feel-able) which I deem normal without oil pressure. Spins freely and smoothly. Unlikely to be a turbo issue. These are my fingerprints on the vanes! That means, heads need to come off and then a...

Affirmative on the valve adjustment. Also, valve train looked ok; no sludge or unexplainable metal shrapnel. Negative on the turbo, have never pulled my D-turbo since I have the truck. Interesting though....on my test drive I was thinking "It makes such a racket, I can't even hear the turbo...

Injectors back from shop, set to max pop pressure and balanced, ultrasound cleaned - look like new. They said the nozzles were fine and did not use any of the spare nozzles I provided, in case. I still did not manage to do a proper compression test. I have a military injector adapter, used a...

Pulled the injectors today and adjusted valve lash. Intakes were tight throughout. Definitely not good. Went with 0.15 intake (as per Jatonka) and 0.25 exhaust. #5 and #6 exhaust were rather loose. Definitely feel good that valve lash is adjusted. Wanted to do compression test with my fancy...

Thanks for the input! I loosened the injector lines on idle, one by one, and there is no stumble or rpm change when loosening #1. I have a set of new nozzles on the shelf. Time to pull all six injectors, have the nozzles changed and the injectors pop tested and balanced. Fuel filters are...

Background, before today: Truck ran very well. Startup at first couple of turns, good power, some smoke when you lean into it (pump is turned up a bit). Unspectacular pre-trip. No oil in coolant or coolant in oil. Today: Cranked for a few seconds before it caught. I let it warm up and drove it...