been having losing prime over night problem so i order new tubes and new o rings for for the injectors they only have about 4000 miles on them but im ganing oil .My ? is can you reuse the copper washers and are they the same as stock washers cummins is sending the ones for my truck but will the fit the new sticks.This losing prime deal is driving me crazy



bad 1 ton

 

The stock cummins washers will fit the 275's and as far as I know, any other injector that you put in there. If your gaining oil that can't be good. That means that diesel fuel is getting into your oil and diesel isn't exactly a great lubricant. I'd change your oil ASAP.

 

big blue

funny thing is you cant smell diesel in oil but shes losing prime and doing it for about 3 weeks the only thing i can think of is the tubes has a bad o ring and let her lose prime once she is started which is about ten seconds she is good to go all day


bad 1 ton

 

Hopefully it's that easy of a fix. Fuel leaks can be the biggest PIA to find and deal with. Almost as bad as electrical issues.

 

bb


when you changed your's did you change you'r o rings on the tubes i did not and thats most likley my problem it just took a few months to show is ugly head or am i going out on a limb ?



bad 1 ton

 

I would check the injector body o-rings. If they leak....they can fill the crank case with Diesel. All it takes is a little cut!! It sucks....but i would replace them while you have them out. I dont think the injector tubes would fill the crank case....they would drain back into the tank.....or leak past the injector lines.....unless they blow out an injector body o-ring. I would pull all and replace any o-rings that can be replaced.

Dan

 

The only thing I replaced on my truck when I changed injectors was the little copper o-rings on the end of the injector.

 

Right....in most cases that is fine...BUT we are dealing with a potential Diesel leak....that is why for the Defcon 5 reaction for the o-rings......

 

I agree 100%. I'd definately replace the little stuff first before I'd start with the bigger stuff.

 

going to tear in to her tommorow night if i can talk my brother in law in working late at the shop free labor he has a 12 valver he would rather work on a ctd than eat steak



bad 1 ton

 

Trust me....i know the feeling!

 

dd

did you have the same problem and did you see any effects on the motor .I think she got a good wash out .Parts did'nt come yesterday promised the be here today ups decided not to deliver lost in transit go figure


bad 1 ton

 

UPDATE
got the injectors and the connector tubes out and back in # 4 injector had a nick in the o ring and 5 out of six connector tubes had bad o rings with burnt oil on the top .The only problem i had is # 6 had to remove and reinstall had a bad misfire it wasn't seated right after this she fired right up and smoothed out .now to wait till morning and see if she loses prime keep your fingers crossed


bad 1 ton

 

GOOD!!! Glad you found something! Let us know what happends!

Dan