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Fwiw, my Cometics lasted about one day before they blew using H-11's. The fire rings are still going strong after a couple years. Sent from my SM-G925I using Tapatalk

Heres a couple of mine: https://www.youtube.com/watch?v=aTkcZPZEhUs https://www.youtube.com/watch?v=xN5R9vDB3PY Neither were taken in very cold temps though, the videos were just to show idle stability with large nozzles.

Hey buddy, been awhile! This thread is turning into one heck of a reunion! For those who dont know Cody, hes was Bills right hand man for some time and is one of the most knowledgeable tuning/ diesel/ truck guys around. He has taught me everything I know about the way these things think and...

I do! Running well, its a bit slower after I traded for a set of 400(?)/ 200's. I was having nozzle reliability issues, any kind of issues like that had no place on a DD so they had to go. Cool! PM me your email. I think we had a thread like this going back in the day, we should revive that...

Thanks guys! Not a problem, it would probably just be easier to show you though. Its been awhile since I've needed to play so ill have to dig around for the most recent revisions. You looking for 200% stuff or 400%?

Wow its been awhile, thanks for the kind words! Got a message from Tim today to give this tread a peek, next thing I see is Charles talking tuning/ injectors and timing ... I had to smile. Glad to see the "old timers" still going at it!

Fire ring is your only option, nothing else will live long in your application.

Coolant. Sent from my SGH-I747M using Tapatalk

Particulars of the truck please. 2wd, 4wd, ABS and model year. All make a difference how the speedometer is controlled.

Tim, shoot me a text. Phone died and lost all my numbers, again.

Its caused by a lack of flow through the cooler (plugged inline filter or the cooler itself), low trans fluid level or filter issue. If that all checks out you have an internal pump issue.

Do Cummins guys use fire rings, or just the standard o-rings?

Start by checking for a steady AC voltage at the speed sensor. If the signal looks clean check the signal at the PSOM. 12 terminal connector, Red/Pink (R/PK) and Light Green/Black (LG/BK) wires. If the signal is steady but the speedo is still dropping out, suspect a PSOM failure, or your loosing...

Can anyone how so much stuff finds its way to the pump? Is there not a pickup screen?

Could it be the circlip from the top of a lifter? Of course the lifter would have just fallen apart as soon as the pushrod came out. Maybe remnants from a previous failure?

Crush sleeve on a t-case?

Dont stop at the front cover, be sure to pull rod and main caps for a visual at the bare minimum.

There isnt much to fail in an oil pump, seems like there is bigger issues. Did you change the oil yet? Any chance you cut the filter open to take a peek?

Yeah, just add a balance tube between the pumps and run a line to each head.

Can you provide some measurements. Cap size and distance between opposing caps. Internal or external snap ring?