Soot around injector - Competition Diesel.Com

ParkerFly · 04-18-2017, 07:17 PM

Forgive the noob question, I'm not very knowledgeable on Cummins. I noticed on mine yesterday there is some soot around one of the injectors. This motor was just rebuilt this winter with a new head and injectors. Is this something I should be concerned about and if so what do I need to do? Thanks

R1raptor · 04-18-2017, 07:33 PM

There is a copper sealing washer under the injector that seals it to the head. I would pull that injector and replace the washer. Measure the thickness cause there a few different thicknesses available.

YoungDiesel27 · 04-18-2017, 07:33 PM

Compression is getting past the copper washer. Pull it and clean the bore with a brush, reinstall with a fresh washer.

ParkerFly · 04-18-2017, 08:13 PM

Thanks, I figured/hoped it was something simple like that. I'll take a look at it and see if I can get that fixed.

Ram12vcummins · 04-19-2017, 07:07 AM

What do you guys recommend to use for that? Buying an injector cleaning kit? They look rather expensive.

JNewman92 · 04-21-2017, 01:45 AM

Quote:

Originally Posted by Ram12vcummins

What do you guys recommend to use for that? Buying an injector cleaning kit? They look rather expensive.

All you need is just the injector bore brush really. They are not that expensive, a actual cummins brand injector bore brush is only around $15 usually an a nice tool to have.

Injector Bore Brush :: Injectors :: Scheid Diesel

There's a link to the cummins brand one which scheid carries, just to give you a idea, can be bought at other places.

Sent from my SAMSUNG-SM-G930A using Tapatalk

04-18-2017, 07:33 PM	#2
R1raptor Name: R1raptor Title: Diesel Enthusiast Status: Not Here Join Date: Nov 2011 Location: North florida Member`s Gallery Posts: 127	There is a copper sealing washer under the injector that seals it to the head. I would pull that injector and replace the washer. Measure the thickness cause there a few different thicknesses available. __________________ 93 chevy 3500 : 215hp p-pump, 5sp, 19, afc tuned ,plate delete , 3.54 d80 , slipping clutch. 83 chevy 3500 : 215 hp p-pump,5sp,19,afc tuned,plate delete,rack plug, valair ceramic single,3.42 14b, Vintage air, in need of twins.

04-18-2017, 07:33 PM	#3
YoungDiesel27 Name: YoungDiesel27 Title: Never Enough Time Status: Not Here Join Date: Jul 2010 Location: West Virginia Member`s Gallery Posts: 825	Compression is getting past the copper washer. Pull it and clean the bore with a brush, reinstall with a fresh washer. __________________ EFI Live, HP Tuners, Smarty custom tuning

04-18-2017, 08:13 PM	#4
ParkerFly Name: ParkerFly Title: Pulling sled for hire Status: Not Here Join Date: Aug 2008 Location: Tennessee Member`s Gallery Posts: 89	Thanks, I figured/hoped it was something simple like that. I'll take a look at it and see if I can get that fixed. __________________ Justin '97 F-250 - 260k 463 hp - 7-9-09 All work by Bean's. Heartbreaker 2 pulling sled

04-19-2017, 07:07 AM	#5
Ram12vcummins Name: Ram12vcummins Title: Too Much Time Status: Not Here Join Date: Mar 2015 Member`s Gallery Posts: 1,659	What do you guys recommend to use for that? Buying an injector cleaning kit? They look rather expensive.