I am going to install new injectors in a 3406E.
I have never done injectors on the E model or newer cats.
Any help on the torq specs and what all has to come off would be appreciated.
Thanks
Installing injectors
Discussion in 'Trucks [ Eighteen Wheelers ]' started by 379wheathauler, Jan 21, 2013.
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Gotta yank off the the jakes and whatnot. Couldn't give ya torque specs. Got mine installed for one hell of a deal from a buddy of mine. Your local cat or any cat shop for that matter can probably give you a pretty detailed printout on it. Good luck!
379wheathauler Thanks this. -
Like stated....jakes and rockers. Make sure to drain fuel from the head before you pull the first injector. A long screwdriver and rag will clean where the orings sat in the head. Lube new with engine oil. Torque to 40 ft/lbs. They say use new bolts, but I've done dozens with the old bolts with no problems.379wheathauler Thanks this.
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80 ft/lbs for the Jake/rocker bolts and nuts.379wheathauler Thanks this.
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I understand some CAT need reprogramming to new injector specs. Don't know the real deal though.
I got Cummins access via https://quickserve.cummins.com/info/index.html. Check and see if CAT offers something similar.379wheathauler Thanks this. -
Yes I forgot that...need to write down each new injector trim code and load in ECM.379wheathauler Thanks this.
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Thanks CatPowerC15
I just ordered the pro-link iq with the cat software so I hope i can Put the trim codes in the ecm with it. if not then i wasted a bunch of money, wont be the first time. ha ha -
Pro Link will work just fine changing trim codes.379wheathauler Thanks this.
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Well I just got old injectors out, 3 had the lower oring broken,one of the 3 the oring was over a third gone.
One injector cup looked lie it had antifreeze in it.
Is ther any special tool for changing the injector cups? Or should i even mess with them?
Thanks -
Yes while you're there change them. Drain coolant out. I made my tool because Cats was too expensive. A piece of 1" threaded rod makes a great one. Make sure you get the updated cups. Most dealers should have the new style though. Make sure to clean the bores on the head too.
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