It's not like timing a gasser. You have to time the injection pump with precision tools, it's usually a job best left to a diesel mechanic. I've done a lot of back yard & garage mechanical work on all my vehicles over the years, but I've never attempted timing on a Dodge/Cummins. I did replace/time pumps on a 6. 2 Chevy & an Oliver tractor, but they were rotary pumps. To clean the engine, I just drive a few blocks to a car wash, & with a cool-luke warm engine, just hose it off.