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Re: AN fitting leak
[Re: Challenger 1]
#234575
02/24/09 11:18 AM
02/24/09 11:18 AM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
OP
master
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OP
master
Joined: Mar 2003
Posts: 3,358
Berwyn, IL
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Quote:
Is there and dents/damage to the male end where it seals right on the tip?
No, I had to pull the pump a few times because it is a pos B.G. that kept spawning leaks and figured it was worn fittings causing the leak so I replaces them both with brand new Earls fittings. I have been after drips in this area all last summer between the pump and these fittings I am ready to just drop a match.  How hard can you torque these things? I am hesitant to put too much pressure with them being made of aluminum, and yes I have the correct aluminum wrenches for the fittings.
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Re: AN fitting leak
[Re: Challenger 1]
#234579
02/24/09 12:12 PM
02/24/09 12:12 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
OP
master
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OP
master
Joined: Mar 2003
Posts: 3,358
Berwyn, IL
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Quote:
I meant maybe it's the fitting screwed into the fuel pump, where it screws into the pump? Is it tapered pipe thread or straight thread that uses a O ring to seal?
Oh no, it is definitely the AN fitting itself. I have put teflon tape on the pipe threads and their is an o-ring as well.
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Re: AN fitting leak
[Re: Jerry]
#234581
02/24/09 01:00 PM
02/24/09 01:00 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
the fittigs with the o-rings never use pipe tape on them. they are designed to be sealed with only the o-ring. pipe tape if its on too thick may stop it from seating correctly and giving an improper torque reading.
Ditto 
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Re: AN fitting leak
[Re: Challenger 1]
#234582
02/24/09 04:00 PM
02/24/09 04:00 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
OP
master
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OP
master
Joined: Mar 2003
Posts: 3,358
Berwyn, IL
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Quote:
Quote:
the fittigs with the o-rings never use pipe tape on them. they are designed to be sealed with only the o-ring. pipe tape if its on too thick may stop it from seating correctly and giving an improper torque reading.
Ditto
 I will note that for the future. The angle of the lines may be a good point, I don't think any of the bends are that sharp. I had this setup for 5 years and it never leaked a drop until I had to R&R the fuel pump a few times because of leaks in the rotor housing of the pump. 
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Re: AN fitting leak
[Re: challenger70]
#234583
02/24/09 04:28 PM
02/24/09 04:28 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I'd replace the 2 offending fitting one more time, clean them(the new ones) with brake clean, give them a good visual inspection for nicks etc, lightly lube the threads/O ring with 30 wt oil & snug em.
live every 24 hour block of time like it's your last day on earth
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Re: AN fitting leak
[Re: challenger70]
#234584
02/24/09 04:55 PM
02/24/09 04:55 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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I figured I'd throw my  in. I know a retired Top Fuel Crew Chief and learned from him that he always "lapped" the fittings in the flare area. After I learned about this I started inspecting mine and have found that very little surface area is actually making contact! Try using some lapping compound (sparingly) on the flare, snug up the fitting and swivel it back and forth until it cleand the anodizing off of both flared ends of the fittings. Look for a nice pattern like you would find on a valve/seat face. Be sure to remove all the lapping compound with some brake clean especially important with oil lines! Give it a try and if it is still weeping fuel go for a second round of lapping. I think this will take care of your issue and won't cost much. Other than my "Nominal Fee". 
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Re: AN fitting leak
[Re: roadhazard]
#234586
02/24/09 05:06 PM
02/24/09 05:06 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
I figured I'd throw my in. I know a retired Top Fuel Crew Chief and learned from him that he always "lapped" the fittings in the flare area.
After I learned about this I started inspecting mine and have found that very little surface area is actually making contact!
Try using some lapping compound (sparingly) on the flare, snug up the fitting and swivel it back and forth until it cleand the anodizing off of both flared ends of the fittings. Look for a nice pattern like you would find on a valve/seat face. Be sure to remove all the lapping compound with some brake clean especially important with oil lines!
Give it a try and if it is still weeping fuel go for a second round of lapping. I think this will take care of your issue and won't cost much. Other than my "Nominal Fee".
Wow , never heard of that. I've built,tuned and driven 3 TADs and 2 Q8 dragsters and have made many hoses and have never had a problem getting them to seal. I only used KB fittings that were hard anidozied and I don't think you want rub that off because then the alky will attack the aluminum.
Check out this 632 pontiac engine I ran for a couple years. Dry sump, fuel injection on alky, with 10 NOS solinoids. Many hoses on this one for sure.
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Re: AN fitting leak
[Re: Challenger 1]
#234589
02/24/09 05:51 PM
02/24/09 05:51 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Wow , never heard of that. I've built,tuned and driven 3 TADs and 2 Q8 dragsters and have made many hoses and have never had a problem getting them to seal. I only used KB fittings that were hard anidozied and I don't think you want rub that off because then the alky will attack the aluminum. Ever heard of Ken Veney? Been around a long time. He currently runs a 3 Alcohol Hemi (converting to 4) Pulling Tractor and does not put a new AN line on the thing until it has been lapped! The man does not do things for the sake of just doing them. If you think about it the alcohol should not make contact with the fitting in the sealing area where the anodizing will be removed except on disassembly. I dont beleive he's using alcohol anyway. I have never had a problem either and I have Earl's on my car. Just thought I'd try to help the dude out! 
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Re: AN fitting leak
[Re: roadhazard]
#234590
02/24/09 06:01 PM
02/24/09 06:01 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Wow , never heard of that. I've built,tuned and driven 3 TADs and 2 Q8 dragsters and have made many hoses and have never had a problem getting them to seal. I only used KB fittings that were hard anidozied and I don't think you want rub that off because then the alky will attack the aluminum.
Ever heard of Ken Veney? Been around a long time. He currently runs a 3 Alcohol Hemi (converting to 4) Pulling Tractor and does not put a new AN line on the thing until it has been lapped! The man does not do things for the sake of just doing them.
If you think about it the alcohol should not make contact with the fitting in the sealing area where the anodizing will be removed except on disassembly. I dont beleive he's using alcohol anyway.
I have never had a problem either and I have Earl's on my car. Just thought I'd try to help the dude out!
Settle down, not saying your wrong.
Just never had to do it. I was lucky I guess.
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Re: AN fitting leak
[Re: roadhazard]
#234591
02/24/09 06:12 PM
02/24/09 06:12 PM
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Joined: Mar 2003
Posts: 3,358
Berwyn, IL
challenger70
OP
master
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OP
master
Joined: Mar 2003
Posts: 3,358
Berwyn, IL
|
Quote:
I figured I'd throw my in. I know a retired Top Fuel Crew Chief and learned from him that he always "lapped" the fittings in the flare area.
After I learned about this I started inspecting mine and have found that very little surface area is actually making contact!
Try using some lapping compound (sparingly) on the flare, snug up the fitting and swivel it back and forth until it cleand the anodizing off of both flared ends of the fittings. Look for a nice pattern like you would find on a valve/seat face. Be sure to remove all the lapping compound with some brake clean especially important with oil lines!
Give it a try and if it is still weeping fuel go for a second round of lapping. I think this will take care of your issue and won't cost much. Other than my "Nominal Fee".
Forgive my ignorance but what is and where can I find "lapping compund"? Thanks for the great ideas guys 
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