zog Posted October 27, 2009 Share Posted October 27, 2009 I have a 7.3l that i installed 3 injectors in for a sludging concern, none of the 3 were pulsing oil from the spout. After replaceing the 3 injectors i took it for a road test, no problems. Sent it to wash bay to be cleaned, they brought it back and i noticed fuel leaking on the ground. Upon further inspection i found that it was coming out of the coolant resivior. None of my injectors went in hard to suspect a cracked injector cup. Only one of two things i know of can create this concern, either a cracked cup or cracked head. Any other thoughts? Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted October 27, 2009 Share Posted October 27, 2009 It's almost certain to be leaking cups on a 7.3, I've never seen anything else cause this. (On a 6.0 it's common to be a cracked head) You could pull the injectors and pressure test the cooling system to diagnose which cup is leaking, but I'd suggest doing all 8. Is it an earlier truck with brass cups? Good Luck! Quote Link to comment Share on other sites More sharing options...
zog Posted October 27, 2009 Author Share Posted October 27, 2009 It is an 2001 f350, i'm not familiar with what the cups are made of. Quote Link to comment Share on other sites More sharing options...
Fredsvt Posted October 27, 2009 Share Posted October 27, 2009 What coolant is supposed to be in it, green or gold. Green would be brass, gold the others. Quote Link to comment Share on other sites More sharing options...
zog Posted October 28, 2009 Author Share Posted October 28, 2009 It has brass cups, i found cylinders 2 and 4 had cracked cups. those are two of the three cylinders i installed new injectors in. I had no problems installing the injectors, lubed the orings and applied a SMALL amount of pressure with the palm of my hand to install them, where did i go wrong? Is this somthing i caused? Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted October 28, 2009 Share Posted October 28, 2009 I can't see any installation errors that would cause the cups to crack. More than likely, they were already cracked with the cracks filled in with debris/corrosion. Just R&Ring the injectors was enough to disturb them and cause them to leak. I usually tell students to look for a root cause of overheating like a bad fan clutch, clogged radiator fins, etc, which is usually the real reason they cracked. Relax, it's not your fault. Have Fun! Quote Link to comment Share on other sites More sharing options...
zog Posted October 28, 2009 Author Share Posted October 28, 2009 Never the less ill be performing this repair out of charity, i don't think the customer would be able to comprehend the fact that it is strictly coincidental. Quote Link to comment Share on other sites More sharing options...
mchan68 Posted October 28, 2009 Share Posted October 28, 2009 Never the less ill be performing this repair out of charity, i don't think the customer would be able to comprehend the fact that it is strictly coincidental.That is BULLSHIT in my opinion. Unless you caused the failure, or "didn't go deep enough" you should NOT be working for free, least of all a job that is as particularly involved as this one. I'd be speaking to the SM if I were you, for some internal time if the customer refuses to pony up for the repair. Quote Link to comment Share on other sites More sharing options...
zog Posted October 28, 2009 Author Share Posted October 28, 2009 I will say the dealership has always taken care of me when it wasn't a self induced shit show. They are fair in that aspect, but i wasn't 100% sure if this wasn't my doing being that i just replaced those injectors? Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted October 28, 2009 Share Posted October 28, 2009 And just how many miles are on this truck? Shit gets old and rusts,breaks and just plain old wears out. I would hope that your SM would be standing behind you on this one. Don't do it for free, it wasn't your fault that the cups cracked. It's a common repair on 7.3's and 6.0's, as a matter of fact it's common on most all diesels. Cat's,Cummins,IH,Detroit they all have injector cup issues after they get older and have put many many miles on them. Quote Link to comment Share on other sites More sharing options...
zog Posted October 28, 2009 Author Share Posted October 28, 2009 186,000 miles, like i said the sm hasn't let me down yet, been fair so far. Quote Link to comment Share on other sites More sharing options...
joshbuys Posted October 28, 2009 Share Posted October 28, 2009 do you remove the heads for this repair or do it in chassis? we had a plate at my old dealer that one of the guys mocked up to remove the back ones that are under the cowl. drop a dime or penny in the bottom before running the tap in, then pull the fronts with a slide hammer and the rears with the plate. saves SOOOOOO much time. Next time I have the 'pleasure' of doing this repair, i'm gonna make the tool we had at my old dealer. Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted October 28, 2009 Share Posted October 28, 2009 That is BULLSHIT in my opinion. Unless you caused the failure, or "didn't go deep enough" you should NOT be working for free, +2, Don't do this repair for free. It's done in the chassis, actually quite easy. Do you have the tools? Quote Link to comment Share on other sites More sharing options...
zog Posted October 28, 2009 Author Share Posted October 28, 2009 I have the tools, i dont have a plate for the rear 2 though, that would be nice. i was going to use a bolt in the tap and a couple of prybars. Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted October 28, 2009 Share Posted October 28, 2009 Depending on which tool set you have: On the rear cyl, cut the threads, and then use the puller plug (without the slide hammer) with a large socket over it and a bolt to pull up on the puller plug. In my notes I have to machine a 1/2" drive 1.5" deepwell socket to 1.86" OD (PN SIM 480 Snap-On) which fits between the rockers quite nicely. You may be able to "make something work", like a hunk of tubing, pipe, or a ball joint press adapter. Clean the hole, and use Loctite 262 for a sealer. Good Luck! Quote Link to comment Share on other sites More sharing options...
zog Posted October 29, 2009 Author Share Posted October 29, 2009 thanks for the support guys, all went well, the truck is on the road with out any problems. Quote Link to comment Share on other sites More sharing options...
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