Diesel injector carbon question

[offroad101]

I removed the injectors on my 3510 , A1700 engine and found a lot of carbon buildup under 2 of them.
Has anyone seen this before? What needs to be done, are they not sealing properly?

Thoughts?

 

[oldnslo]

What did the tips of the injectors look like?

I replaced injectors on my A1100N and just the tip in the combustion chamber had carbon on the. The brass sealing rings prevented any carbon in the injector bore like yours has.

 

[offroad101]

The tip has a dark thin layer on it. It looks like it fits into a brass cup down there. Do you know if those cups need to be replaced to seal around the tip, and could they be put in from the top?

 

[thepumpguysc]

There should be a copper gasket around the tip.
U can buy them as a set, the washers and cup..
It could be the spray pattern of the injectors isn’t to spec and the fuel isn’t getting a clean burn.??

 

[offroad101]

There should be a copper gasket around the tip.
U can buy them as a set, the washers and cup..
It could be the spray pattern of the injectors isn’t to spec and the fuel isn’t getting a clean burn.??

My “cup” is in the head and didn’t come out with the injector, do you know if I can pull it out from the top, put the new one on the injector and screw it down into the head?

 

[offroad101]

My “cup” is in the head and didn’t come out with the injector, do you know if I can pull it out from the top, put the new one on the injector and screw it down into the head?

Also- do you or anyone else know where I could send the injectors to get them tested? I talked to a local diesel shop and the acted like they didn’t want to mess with it because they didn’t have specs on Branson and said they wouldn’t be able to get parts.

 

[thepumpguysc]

U can use a pick w a small 90* and go they the center of the cup and lift it out..
U may have to scrape some carbon from around the edges..
If u have an air compressor, a good blast of air works too… but will make a mess unless u cover the area with a shop towel..

I can do the injectors for u..

 

[offroad101]

U can use a pick w a small 90* and go they the center of the cup and lift it out..
U may have to scrape some carbon from around the edges..
If u have an air compressor, a good blast of air works too… but will make a mess unless u cover the area with a shop towel..

I can do the injectors for u..

Great, can you send me the info so I can get them sent out to you.

 

[thepumpguysc]

Prvt msg sent

 

[thepumpguysc]

It’s possible that u being a new member thst u can’t receive prvt msgs.??
U can reach me directly at my home email..
My screen name at aoldotcom in your homes mail service..

 

[dpauly]

Saw a guy on youtube who welded a tap (as in Tap & Die) of a slightly larger diameter than the opening in the cup ('Course' thread would be OK) onto a metal rod of about 12" and fashioned a sort of slide hammer from it. To use he just threaded it a ways into the cup and pulled the cup out. As for when/if to replace, most of what I've learned says only if the cup is cracked or otherwise damaged and cannot be cleaned up do you need replace them. I've found a wooden golf tee, one 4" or longer ('standard' length tees are too short to poke past the bore opening, making them hard to pull out without needle nose, etc.) plugs the hole nicely so you can clean any carbon and blow it out without debris dropping into the cylinder.

 

[Texasmark]

Before you start tearing things apart, you might get yourself some Power Services and Sea Foam "snake oils" and let chemistry do its job. Most auto parts stores carry both, SF for sure...may have to go to a farm store or go online for PS chemicals. On my diesels, I use SF if I need to clean up something, like sludge in an oil pan or such and PS in every fillip. I just don't have fuel related problems as you mention. Both have stood "the test of time".....the trademark of a quality product!