Injector question

[TNRGreene]

What is this discoloration on this one only. I have 4 out to replace the o rings & coppers. I've taken 6 pics & can't get it clearer

 

[WolfLMM]

Is this from the cylinder you were having problems with, in your other thread?

 

[JOHNBOY]

If I had to guess it looks like it was moving around some. Rub polished. Can you take a pic of another ont to compare?

 

[TNRGreene]

Is this from the cylinder you were having problems with, in your other thread?

Yes but there was another one with nothing

If I had to guess it looks like it was moving around some. Rub polished. Can you take a pic of another ont to compare?

The other 3 have no brown on them & look new

 

[WolfLMM]

I cant really see it that well, but it looks like a heat mark. Could be polish like JB says, but I dont see how it could move around in the bore.

 

[JOHNBOY]

It could be heat or oil contanimation(sp?). Hard to tell.