---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 06/17/23: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:32 PM - Re: Re: weepy fuel header tank fitting, CJ6A (W LANNON) ________________________________ Message 1 _____________________________________ Time: 03:32:47 PM PST US From: W LANNON Subject: Re: Yak-List: RE: weepy fuel header tank fitting, CJ6A Justin; I dealt with this problem over 20 years ago. Assuming this is an early CJ (1960's) the reason is almost certainly 2 different factories! One using the original British pipe thread specs. The other using the American revised version which (for the size) shows a one thread difference in threads per inch. (TPI). I can't recall whether it is + or-) The upper fitting in your photo is the correct one since it uses a tapered thread. The lower fitting with straight thread would require a sealing washer seat which does not exist. The best advice I can give you to properly correct this is take it to good machine shop. Give them a copy of this memo. They will have the necessary tools, equipment and knowledge to properly to do this repair. Best; Walt From: "Justin Drafts" Sent: Wednesday, June 14, 2023 1:13:06 PM Subject: Yak-List: RE: weepy fuel header tank fitting, CJ6A Ok CJ6 maintenance experts, I please need some advice. It's time to resolve my fuel header tank's weep from its forward fitting. (A chronic CJ6 problem, I understand?) Removing the original Chinese fitting, I see the threads in tank & fitting have been scored. I'll try to tap new threads in the tank, but... what size threads are these? (Pls see the 2 pix, the new fitting next to the old one for ref.) Ie- what size tap to use? And where to find? Advice? Thanks all, any advice much appreciated- Justin Drafts N280NC @ Paine Field WA ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.