ISX15 CM2350 injector cups
03-01-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #1
Wink ISX15 CM2350 injector cups
I’ve heard people say different things about replacing injector cups, some say you can replace without removing the head, and some say you have to remove the head, please if anyone has experience with this help me out
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03-01-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #2
RE: ISX15 CM2350 injector cups
I believe Cummins is remove head and put new head on. Not worth the effort to do injector cups. How many miles are on the head? They work harden fairly quickly.
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03-01-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #3
RE: ISX15 CM2350 injector cups
Cummins sell a tool that installs injector cup retainer/crush rings in the head while it's still on the engine. I've had and heard of a very high success rate doing it this way. It isn't even that big of a job so it's worth a try.

Just need the injectors out and the rocker shafts removed.

This only works on CM2250 and 2350 engines. Fuel/coolant cross-contamination on a CM570/870/871 is only rectified by replacing the cylinder head.
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03-01-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #4
RE: ISX15 CM2350 injector cups
670k on the motor, never been opened
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03-09-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #5
RE: ISX15 CM2350 injector cups
my truck is at jerry's shop now fixing this problem. its a special tool to fix it and you dont need to take the had off. Cum2350 2015
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 Thanks given by: Waterloo , Signature620
03-11-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #6
RE: ISX15 CM2350 injector cups
(03-01-2020 )Signature620 Wrote:  Cummins sell a tool that installs injector cup retainer/crush rings in the head while it's still on the engine. I've had and heard of a very high success rate doing it this way. It isn't even that big of a job so it's worth a try.

Just need the injectors out and the rocker shafts removed.

This only works on CM2250 and 2350 engines. Fuel/coolant cross-contamination on a CM570/870/871 is only rectified by replacing the cylinder head.

I was getting a bit of water into my Water/Fuel separator. After a pressure test it was determined that I had an injector cup issue. Cummins did indeed replace all cups no head removal and so far 100k miles or so later no further issues.
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03-11-2020, (Subject: ISX15 CM2350 injector cups ) 
Post: #7
RE: ISX15 CM2350 injector cups
(03-11-2020 )kozakvod Wrote:  
(03-01-2020 )Signature620 Wrote:  Cummins sell a tool that installs injector cup retainer/crush rings in the head while it's still on the engine. I've had and heard of a very high success rate doing it this way. It isn't even that big of a job so it's worth a try.

Just need the injectors out and the rocker shafts removed.

This only works on CM2250 and 2350 engines. Fuel/coolant cross-contamination on a CM570/870/871 is only rectified by replacing the cylinder head.

I was getting a bit of water into my Water/Fuel separator. After a pressure test it was determined that I had an injector cup issue. Cummins did indeed replace all cups no head removal and so far 100k miles or so later no further issues.

they did not replace the cups, they used a tool to put the rings in the cups. to change the cups you have to change the head.


User's Signature: 52 41 57 5a 45 20 53 4d 45 4c 4c 53
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 Thanks given by: hhow55 , 2dlb , Pd6cas2
05-06-2022, (Subject: ISX15 CM2350 injector cups ) 
Post: #8
RE: ISX15 CM2350 injector cups
Does it make sense to install the seal rings on all cylinders even though only one is leaking?
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05-06-2022, (Subject: ISX15 CM2350 injector cups ) 
Post: #9
RE: ISX15 CM2350 injector cups
When we do them, we do all 6
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 Thanks given by: RoddyO , Rawze




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