injector not sealing

2000_fummins

2000_fummins

jack of all master of few
Joined
Sep 3, 2011
Messages
1,196
Ok this may have been my own damn fault. Will the wrong copper washer do this.
 
if you re-use the washers you could get a leak. But the most likely place for a leak is around the intermediate disc in the injector. I fought with mine and went thru like 5 sets of washers in the process before I got fed-up. Not much you can do except lap the bodies in a figure eight pattern on some very fine sandpaper over glass or a flat plate. removing material probably changes the pop pressure too. May as well send them out if thats the case.
the .6mm washers arent cheap either.. =(

Oh hey, Im thinking on doing a ford conversion with this motor since I got so much $$ invested in it.. does an off the shelf twins set fit in the ford engine bay or did you need to make custom plumbing for it?
 
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These are brand new injectors! I had to stop in the middle of puting the injectors in. I may have used 1 old washer by mistake. About your question it is custom piping.
 
Did you make sure all the old ones came out? I've seen people double stack them not knowing.
 
New injectors, with recycled bodies? Or new injectors with brand new bodies? And the intermediate discs?
 
Brand new 5x.014. Im almost certain I used the old washer. Pulled injector and got washer out and it defiantly looks old. Would this little mistake make it not seal? With motor running I could feel the "air or fuel" comeing around the body an the nut that holds it in there. Is the cooper washer that big of a deal, new to old?
 
You can try reusing the old washer just make sure you flip it over first. Make sure everything is really clean and put grease on both sides of the washer and smear it around real good. What are you torquing it to? What thickness washers are you using?
 
I went from stock injectors to the ones previously state. I had everything laying on the table. New an old separated. All other injectors are sealed fine. So what ever copper washers are stock. Im certain I put a stock washer in bye mistake. So your saying if I clean an grease the washer I should be good? Torque is Idk tight? Should I torque them and if so what is the torque?
 
I always take the washer and put grease on both sides of it and spin it around on the injector so it spreads the grease around. If there is anything in the head like a little bit of dirt or something it'll make it harder to seal so I will put a rag on a screwdriver and put some parts cleaner on it and spin it around real good and make sure the injector is clean too. I think Cummins says to torque them to like 55 pounds but I never had any luck with that. On the thicker washers it may work but the thinner washers I normally go to about 120 pounds and if they still leak I will bump it up about 5 pounds at a time. I have cracked a few hold down nuts just trying to get them to seal before. You probably have the thicker washers so I would think 65 pounds would do pretty good
 
Instead of all that ^^ You could just anneal the washers to soften them up and clean the bore well.
 
Yeah, get it red hot and let it cool.
[ame="http://www.youtube.com/watch?v=3jSz11lz8MA"]http://www.youtube.com/watch?v=3jSz11lz8MA[/ame]
[ame="http://en.wikipedia.org/wiki/Annealing_%28metallurgy%29"]Annealing (metallurgy) - Wikipedia, the free encyclopedia[/ame]
 
That's an awesome video bro. What exactly will this do with the copper washer and my sealing issue? Im gessing fix it hopefully.
 
It makes copper that has work hardened soft again. The softer copper should conform to any irregularities better and give you a better seal. James had good advise too, I'd just be too chicken to torque the nuts over 100ft-lbs.
 
White Knight said:
It makes copper that has work hardened soft again. The softer copper should conform to any irregularities better and give you a better seal. James had good advise too, I'd just be too chicken to torque the nuts over 100ft-lbs.
Click to expand...

Yeah that annealing would probably work pretty good. I thought about doing that before but never did because I hadn't done it before on an injector washer and never heard of anybody doing it so I just figured there was some reason why lol. Believe it or not them nuts will take a ton of torque, its just a matter of how many times haha
 
20 gauge shotgun brush on a rubber hose in the cordless. 35 seconds, blow out with compressed air, spotless injector bore.

Worked for me.
Hope you don't have bad injector, that would suck.
 
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