24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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injector lines leaking

Old Aug 14, 2011 | 08:50 AM
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Default injector lines leaking

I put a new head on, and thought I set the injectors and tubes back in properly but a couple of them are leaking under pressure. I thought it was the seat of the line to the tube at first but noticed the fuel only coming out the thread between the head and the ferral.
I just tried loosening the injectors and re seating the tubes but no good. #5 is the worst but #1 #3 #4 are weeping.
Any thoughts or ideas will be greatly appreceated.
 
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Old Aug 14, 2011 | 12:37 PM
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sounds like you need new tube orings if its comin out around the threds
 
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Old Aug 14, 2011 | 04:42 PM
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I did replace the orings that came with the head gasket kit??????
 
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Old Aug 14, 2011 | 05:07 PM
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then i would probably try retorquing the injectors
 
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Old Aug 14, 2011 | 07:06 PM
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Do you suspect its leaking past the injector o rings and not where the tube seats into the injector?? Or Could it have deformed "*****"on the end of the lines and not seating on the tubes properly. I have checked these for cleanes but just a thought....
I only have a 1/2 torque wrench so with the adaptors down to 1/4 drive should I allow a few pound in the torque settings????? very hard to find a 5/16 size socket in 1/2 drive..
 
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Old Aug 14, 2011 | 09:37 PM
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over torque on the injectors causing the tubes to leak at the body could very possibly be the problem if you using a 1/2" wrench since they only torque to 89 in lb i would get new copper washers and retorque them with the proper wrench
 
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Old Aug 15, 2011 | 12:23 AM
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Originally Posted by ozyf250
Do you suspect its leaking past the injector o rings and not where the tube seats into the injector?? Or Could it have deformed "*****"on the end of the lines and not seating on the tubes properly. I have checked these for cleanes but just a thought....
I only have a 1/2 torque wrench so with the adaptors down to 1/4 drive should I allow a few pound in the torque settings????? very hard to find a 5/16 size socket in 1/2 drive..
so your connector tubes have new o-rings on them? Did you apply a little grease to each o-ring so it would swell up? Are all of them leaking or just a couple? I would say it's possible to have a burr on the ones leaking if it's only a couple and you can fix this by removing the leaking lines and lightly sanding them to smooth them out and then reattach them and see if that works.

Originally Posted by cummin_un_glued
over torque on the injectors causing the tubes to leak at the body could very possibly be the problem if you using a 1/2" wrench since they only torque to 89 in lb i would get new copper washers and retorque them with the proper wrench
I am unsure how your able to over torque a 24v as the injector hold down goes flat against the head only real issue would be snapping the hold down bolt.
 
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Old Aug 15, 2011 | 08:31 AM
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Thanks for the surgestions guys. I loosened all the injector bolts off and retorqued them with a 1/4 wrench then swaped tubes, I put #5 into #3 and that seems to have stopped for now, Ill check it once I give it a road test, now the return 'T' is leaking so Ill look at that tomorrow.

01quadcab Yea I did remember about the grease trick. I found that I had better luck slowing the leak when I only "nipped" the swivel nut up than when I swung off of it...
 
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Old Aug 18, 2011 | 11:18 AM
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also, remember, the o rings only seal in the oil... they have nothing to do with fuel. I had a couple of tubes leak the first time I had mine apart, cost me 2 inj. tubes @ $50 ea. looking back, I probably had a bit of crud in the seat, and caused it to erode.
 
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Old Aug 20, 2011 | 06:33 AM
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Well Im lost.... Fixed the return "T" leak then cleaned the seat on #5 tube again and put it back together and went on with the auto tuning Now after a week of driving, it doesnt leak any more..Im guessing the heat of the engine helped reseat the line to the tube.
So alls good and enjoying driving a ford with a cummins. Nearly got the auto sorted the guys at dieselconversions have been great. Hopefully be racing again soon...Cant wait..
 
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