The amount of soot that was turned into a cake and removed at the time of oil change was stunning. Injector big cam nt855 nh 220 nh250 having to set valves and injectors on nt 855. As a teen, I helped maintain a fleet of Macks with centrifugal (Spinner II) bypass filters. Vn Subject: Nt855 Cummins Valve And Injector Adjustment Keywords: nt855. I never owned a mechanical pump engine so I've never sampled/tested one.

Whether or not that 17% is accurate, old mechanical fuel pump engines aren't as precise as an electronic fuel injection so it stands to reason for you to have more soot. My N14 had one big filter that was a combo full flow/bypass. I couldn't remember what Cummins used on the older ones. Anyway that's where you're seeing count/ml and soot is listed as percentage just like oxidation, sulfation and nitration. It's been a long time since I looked at a Cat SOS report but I think those are some sizes they used to list. It will give you the number of particles in terms of >4 microns, >7, >10 microns etc. If you have particle counts listed it will give you the size of wear particles in microns. Some Cat labs test particle count and others require you to request the testing.

Now i will see comments about how they outpull 425 cats and 12.7 or whatever. The particle count is a separate category. Power is more comparable to a 11.1 60 series 350 hp. If you're referring to the 17 in the soot column, that is percentage. Does that mean 17 per ml I don't know how to convert that to a percentage thanks for all the replies it does have a spin on by pass filter all the older cummins did all filters on this truck are Napa gold thanks again The sos sheet says particle count (ct/ml).

Cummins 350 big cam valve adjustment