Reply
Highlighted
Contributor

Re: injector carbon dam

[ Edited ]

 

Caterpillar said:

 

"...the o-ring on the tip of the injector injector is only an aid during the break-in period of the engine..."

 

 At least in the on-highway engines mentioned in the next article:

 

O-ring aids in engine Break-in.PNG

 

Super Contributor

Re: injector carbon dam

No seal on the injector tip. That was likely just carbon. 2974841 is a single injector seal kit.
Contributor

Re: injector carbon dam

at the bottom of the injector body where the nozzle sticks out, has no seal. so what was there is just carbon build up?

Super Contributor

Re: injector carbon dam

There is no seal on the injector tip. Make sure the injector hold-down bolts are replaced.
Contributor

injector carbon dam

[ Edited ]

Is the injector carbon dam on a C9 s/n9dg05020 an o-ring or a flat seal? it crumbled when the injector was removed, was told it was not needed?