Fuel pump fitting
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
Likes: 0
From: Morgantown,WV USA
Fuel pump fitting
I am changing the pump on my 78 and have a question related to the fitting that is between the pump and the fuel line. Its a 90* fitting that threads into the pump outlet.
My question is how far must it be threaded into the pump outlet? Mine has a few threads showing (the stock one had one thread showing) so I am not sure if its in far enough. I really torqued on that fitting to install it once it was tight; so much so I feared that I was going to break the pump body (actually used a 12 inch wrench to tighten it.
I am not sure if it seated or not, but it was very, very tight. Anyone else have this experience?
Dan
My question is how far must it be threaded into the pump outlet? Mine has a few threads showing (the stock one had one thread showing) so I am not sure if its in far enough. I really torqued on that fitting to install it once it was tight; so much so I feared that I was going to break the pump body (actually used a 12 inch wrench to tighten it.
I am not sure if it seated or not, but it was very, very tight. Anyone else have this experience?
Dan
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
It must have bottomed out if it is tight. For insurance you can use this $5.00 heat and fuel resistant sealer. Works well.
http://www.permatex.com/documents/td...tive/59214.pdf
http://www.permatex.com/documents/td...tive/59214.pdf
Last edited by Paul L; May 25, 2012 at 02:02 PM.
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
I am changing the pump on my 78 and have a question related to the fitting that is between the pump and the fuel line. Its a 90* fitting that threads into the pump outlet.
My question is how far must it be threaded into the pump outlet? Mine has a few threads showing (the stock one had one thread showing) so I am not sure if its in far enough. I really torqued on that fitting to install it once it was tight; so much so I feared that I was going to break the pump body (actually used a 12 inch wrench to tighten it.
I am not sure if it seated or not, but it was very, very tight. Anyone else have this experience?
Dan
My question is how far must it be threaded into the pump outlet? Mine has a few threads showing (the stock one had one thread showing) so I am not sure if its in far enough. I really torqued on that fitting to install it once it was tight; so much so I feared that I was going to break the pump body (actually used a 12 inch wrench to tighten it.
I am not sure if it seated or not, but it was very, very tight. Anyone else have this experience?
Dan
Does your aftermaket pump have a fuel return provision? Most don't, and it's a real shame to eliminate the return system with the crappy pump gas we're now seeing. - you might want to consider a stock pump which has the inverted flare threads and a fuel return provision...
Lars
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
Likes: 0
From: Morgantown,WV USA
Fuel pump fitting Reply to Thread
Thanks Roger- that was very timely!
I screwed something up and now need to replace my new fuel pump
I was connecting the fuel line to the fitting on the pump and needed to turn that fitting just a little to make everything line up. When I twisted that fitting a little the darn pump body split right beside the outlet
Sooooooo I made a quick visit to NAPA and my pump should be in tomorrow and I can get the fuel part of my project complete.
BTW anyone had any experiences with Airtex fuel pumps?
Dan
I screwed something up and now need to replace my new fuel pump
I was connecting the fuel line to the fitting on the pump and needed to turn that fitting just a little to make everything line up. When I twisted that fitting a little the darn pump body split right beside the outlet
Sooooooo I made a quick visit to NAPA and my pump should be in tomorrow and I can get the fuel part of my project complete.
BTW anyone had any experiences with Airtex fuel pumps?
Dan
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Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 952
Likes: 0
From: Morgantown,WV USA
Fuel pump fitting Reply to Thread
The stock fuel pump has a female inverted flare outlet, and this is a straight thread: The pump does not use an adapter, and the inverted flare fuel line screws directly into the pump - no thread sealers are used on straight-thread inverted flare fittings, but a little lube should be used on the threads to assure proper torque. Aftermarket pumps commonly use pipe threads with tapered threads, and require use of an adapter of some sort to convert the female pipe threads to something that will adapt to a fuel line. Most people use a 90-degree adapter, as you have done. Pipe threads, once you have applied either teflon tape or a pipe thread sealer, will seal up just fine once the fitting feels "snug." You will never screw a pipe fitting in until all the threads are engaged, but you should screw it in so you have at least 3 threads engaged: Pipe fittings and threads will all differ slightly in how far the manufacturer tapped the tapered threads, so engagement depth of mating components will always vary.
Does your aftermaket pump have a fuel return provision? Most don't, and it's a real shame to eliminate the return system with the crappy pump gas we're now seeing. - you might want to consider a stock pump which has the inverted flare threads and a fuel return provision...
Lars
Does your aftermaket pump have a fuel return provision? Most don't, and it's a real shame to eliminate the return system with the crappy pump gas we're now seeing. - you might want to consider a stock pump which has the inverted flare threads and a fuel return provision...
Lars
Yes, it has the return line. The car has 26k miles on it and aside from the converter, all the smog stuff is in place & works. Thank you for helping with this, I appreciate it