Gas tank threaded fittings size? |
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Gas tank threaded fittings size? |
mb911 |
Jan 15 2019, 07:48 PM
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#1
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914 Guru Group: Members Posts: 6,748 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I need to chase the threads on my tank where the fuel lines connect.. Anyone know off the top of your head? Need to order a die for it.
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wysri9 |
Jan 15 2019, 10:54 PM
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#2
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Member Group: Members Posts: 199 Joined: 23-August 13 From: Aberdeen, Scotland Member No.: 16,291 Region Association: England |
I need to chase the threads on my tank where the fuel lines connect.. Anyone know off the top of your head? Need to order a die for it. Happy to be corrected but by my reckoning they are M18x1.0 - an unusual thread for sure! (IMG:style_emoticons/default/dry.gif) |
Chi-town |
Jan 16 2019, 12:15 AM
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#3
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Senior Member Group: Members Posts: 850 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
Tap the i.d. to 1/4 npt and lose the leaky stock nipples.
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mb911 |
Jan 16 2019, 06:48 AM
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#4
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914 Guru Group: Members Posts: 6,748 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
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bdstone914 |
Jan 16 2019, 07:14 AM
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#5
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bdstone914 Group: Members Posts: 4,496 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Tap the i.d. to 3/8 npt and lose the leaky stock nipples. Not Correct. 1/4 NPT can be internally taped. @Chi-town |
bdstone914 |
Jan 16 2019, 07:20 AM
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#6
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bdstone914 Group: Members Posts: 4,496 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Tap the i.d. to 3/8 npt and lose the leaky stock nipples. My only issue with that is the sock doesn't get used then and have figure out some sort of screen ahead of the fuel pump. @mb911 Ben, I prefer the internal taping to 1/4 NPT and using a threaded fitting inside the nipple. The internal sock never made sense to me. Why trap the crud inside the tank. A simple visible external filter is better. You will not get a common tap to work as ne of the nipples is too close to the seam. I made one from a front 911 spindle nut. Others have found a Nissan spindle nuts has the same threads. You can also grind down a thread file to file the threads. It is only the sock nipple that has the clearance problem. I can send you a spindle nut if you want to clean up the threads. You need to grind down the ears. If you stay with the nipples and paper gaskets make sure you hone flat the sealing surface. It is only 1mm wide and must be perfectly flat to seal. Bruce Attached thumbnail(s) |
mb911 |
Jan 16 2019, 07:53 AM
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#7
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914 Guru Group: Members Posts: 6,748 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
Well that maybe the way to go and just save some potential leaks. So 1/4 pipe tap or 3/8 pipe?
What fittings do you like to use? |
andys |
Jan 16 2019, 09:22 AM
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#8
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None |
Here's a link to one of my posts where I used the AN fittings. Hope this helps.
Andys http://www.914world.com/bbs2/index.php?s=&...t&p=1841822 |
Chi-town |
Jan 16 2019, 10:12 AM
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#9
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Senior Member Group: Members Posts: 850 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
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mb911 |
Jan 16 2019, 11:16 AM
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#10
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914 Guru Group: Members Posts: 6,748 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
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Mike Bellis |
Jan 16 2019, 09:19 PM
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#11
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
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Mike Bellis |
Jan 16 2019, 09:20 PM
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#12
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
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cary |
Jan 17 2019, 09:48 AM
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#13
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest |
Ben I'll find my chaser when I get out to my shop this afternoon.
It's a nut off of a Datsun. Hopefully I kept the Dorman part #. |
Bartlett 914 |
Jan 17 2019, 10:29 AM
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#14
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Advanced Member Group: Members Posts: 2,213 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
I like the idea of using a 1/4 pipe nipple. You will need to ream out the hole to 7/16" for proper threading. I have wanted to install a drain valve and using 1/4 piping will make this easy. Twice now I have purchased bad gas (water in the gas) while some distance from home. This would make it fast and easy to drain out any water that may have settled to the bottom of the tank.
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mb911 |
Jan 17 2019, 11:25 AM
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#15
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914 Guru Group: Members Posts: 6,748 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I threaded this morning to 1/4 pipe.. This Will simplify the system greatly. |
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