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I was referring to some of the scorching around the shoulder and across the rim.
Typically the marks in that pattern are due to a bad injector. and you probably got fuel running down the skirt and burning causing rings and such to get blown out and melting.... prob started small. Take a look at the injectors and or replace them. If you are running a tuner there is alot you need to support that extra fueling.
Not knowing all the details of your build or if its stock its hard to say exactly the cause but I would not just put it back together without looking at the injectors... and I always suggest if you change one change them all. its alot of money but just one of those things. also look at the wiring/valve cover gasket for damage. they are known to fail causing injector issues which can result in this...
Also do you have a EGT gauge. and I have a master manual to the 06-07 years on CD if you are interested in it I can email you. just PM me with your contact info.
My truck is stock I think I have egt and boost guage no tuner no injector tips truck appears stock but I only purchased it 3 months ago with 123000 miles
All of that damage can still happen stock. Dirty fuel or fowled injectors will discuss it. Let me fire up the old computer and pull the manual off it and I'll email it to you...
The manual is a huge help and education into the systems on the cummins.
I'm not 100% sure on a poor cylinder would burn up an injector. It would give poor combustion and should puke out black smoke. You may have an issue with the injector harness may have a nick in the wire poor connection somewhere causin the solenoid to fail. There is a test with a ohm meter to detect if all are working right and it's a ecm issue.
I pulled my hair out with injector issues before I figured out the issue. Went through 2 harnesses and 2 sets of injectors and 3 extra. Turned out it was the fowled fuel system causing the injectors to fail. Probably not the same issue your having but sounds similar
Once I get in from working in the shop, I'll look for the manual and send it over
Typically the marks in that pattern are due to a bad injector. and you probably got fuel running down the skirt and burning causing rings and such to get blown out and melting.... prob started small. Take a look at the injectors and or replace them. If you are running a tuner there is alot you need to support that extra fueling.
Not knowing all the details of your build or if its stock its hard to say exactly the cause but I would not just put it back together without looking at the injectors... and I always suggest if you change one change them all. its alot of money but just one of those things. also look at the wiring/valve cover gasket for damage. they are known to fail causing injector issues which can result in this...
Also do you have a EGT gauge. and I have a master manual to the 06-07 years on CD if you are interested in it I can email you. just PM me with your contact info.
Could I possibly get a copy of that manual I just purchased an 07 3500 am new to cummins could definitely use the guidance thanks
The manual is a huge help and education into the systems on the cummins.
I'm not 100% sure on a poor cylinder would burn up an injector. It would give poor combustion and should puke out black smoke. You may have an issue with the injector harness may have a nick in the wire poor connection somewhere causin the solenoid to fail. There is a test with a ohm meter to detect if all are working right and it's a ecm issue.
I pulled my hair out with injector issues before I figured out the issue. Went through 2 harnesses and 2 sets of injectors and 3 extra. Turned out it was the fowled fuel system causing the injectors to fail. Probably not the same issue your having but sounds similar
Once I get in from working in the shop, I'll look for the manual and send it over