12V injector retainer nut o-ring part#?

Hurley

Hurley

BLAKLUNG
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Apr 27, 2008
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Would someone be willing to get that part number for me?

Swapped injectors last night and had one to crumble to pieces. I torqued the retainer nuts and check everything, but it seems that lacking that little o-ring is what's allowing the leak.

(also, i torqued them to 44ft-lb, is that a fairly accepted value?)
 
roger that, I'm going to hit them again tonight then with the torque wrench. thanks
 
no, they are just dust covers

they have nothing to do with sealing - dont know anyone that uses them

if you are leaking compression you prolly didnt get the bottom of the inj bore clean enough

least thats been my experience

but i also tighen them a lot tighter than 45#

more like 75#

with antiseize on the threads

ps - westons injectors kick butt
 
I use the o rings.

But I spend a lot of time in dusty enviroments. I've got dust everywhere under my hood. Its nasty.
 
44ftlbs is what the books says, I never have a problem at that spec. Did you replace the horseshoe copper return banjo washers? I rarely have luck reusing them. I also never replace the dust seals either.
 
typically the copper return washers can be reused 4 or 5 times with no issues

weston includes new ones tho, with the injectors...the ones he sent me were steel

are yours steel hurley?

did ya get it sealed up?

ps - first time i installed injectors i tightened to factory specs. dont know if it was the antiseize or what but the nutz were not very tight when i went to remove them at a later date. so now if i use a torque wrench i set it higher as stated. i have used a large 1/2" ratchet before and just did it by feel. only time i ever had comp leak i had to remove the inj and clean the bore again. dont think it matters how much torque you put on them if there is carbon on the floor of the boss it will leak
 
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Update:

I loosened and re-tightened the leakers up to 60#'s, no results. the returns are new, copper, and seal accordingly. I also put the new seals on to humor myself (dust cover is appropriate there). Not loosing any compression, either.

I'm going to pull them this weekend and let Weston take a look, just to be sure.
 
it's not running, nor is it bubbling. it's more like a very slow, constant seep that appears around that o-ring, and runs down the side of the head. I daresay that you can even see the fuel flowing... more like oozing.
 
have you tried spraying it with brake clean, bl♀wing it dry, and having someone start it while you watch to determine exactly where the leak is coming from?

can only leak 3 places, under the dust cover, the line on top, or the return

usually when its coming from under the dust cover its a compression leak and there are bubbles

dont think there is any way the injectors themselves are leaking cuz weston woulda caught that when he popped em ♂
 
tony597fitter said:
Also, I take my new horseshoe washers and the injector washers and hit them with my mapp gas torch to soften up the copper.
Click to expand...

do you dunk em in water or let em cool slo?

seems the only thing in that kit thats usable would be the injector return coppers. the 7mm washers are way too thick and you dont need the other stuff. imo
 
DTanklage said:
do you dunk em in water or let em cool slo?

seems the only thing in that kit thats usable would be the injector return coppers. the 7mm washers are way too thick and you dont need the other stuff. imo
Click to expand...

I just lay them on the concrete and hit them with the torch till they change color and just let them sit there to cool.

As far as the kit goes, I just went out and mic'd the injector gaskets.
It comes wit .020, .060, and .090 gaskets.

Have you priced gaskets and horseshoes from Cummins lately? The last time I did that it came out to $30.00. They wanted $3.00 for each gasket and $2.00 for each horseshoe.:bang
 
DTanklage said:
do you dunk em in water or let em cool slo?

seems the only thing in that kit thats usable would be the injector return coppers. the 7mm washers are way too thick and you dont need the other stuff. imo
Click to expand...

Annealing copper, it doesn't matter how fast or slow they cool, just need to get them to a dull red.

Even though Weston already stated where the leak is coming from, I'll pass along my experience. We installed injectors in a buddy's truck about two months ago. We kept getting one of the return line fittings leaking something fierce. Changed the horseshoe banjo washer numerous time with old ones and new ones, kept leaking in the same place. Turns out that the injector was rotating in the bore enough when we tightened down the retaining nut, that it would leak out the back corner of the banjo fitting. Guess the ball or seat wasn't sized right/worn and allowed a bit of rotation. Ended up holding the injector straight with a combo wrench while we cranked down the nut, then reassembled everything. No more leaks.
 
I just put a set of 5x12's in last week from weston. I ran them for 1 day with the hx 35. they ran cooler and had less smoke than the factory ones. I was surprised all around better no haze like the factory ones had when there was the slightest "lugging" by "normal driving".

However #2 and #4 injector are leaking. Nothing terriable but it seaping at the head. My tourque wrench I borrowed only went as low a 50 so I snugged them up good by hand "guess it wasn't enough".

Im going to try to sung them up some more asap. What is the dust cover/oring u guys are talking about. I installed mine with the copper washer at the bottom of the injector, tigghten the nut put the line back on, put the return line with copper horseshoe on. Where/whats the oring???
 
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