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> Stripped Gas Tank Threads
cary
post Sep 12 2014, 09:36 PM
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Working on replumbing my new fuel pump. So I decided to loosen the nuts that cinch down the fuel tank output pipes. Big one came off without a hitch. The return line, that's another story. The aluminum nut totally stripped out. Steel bung threads are embedded with aluminum.

Has anyone bought the M18 * 1.0 die or thread restorer and cleaned those threads before? Kind of an odd sized thread.
Hate to give up on this tank.
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walterolin
post Sep 12 2014, 09:46 PM
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Had the same problem, didn't want to buy a one time chaser (that's what plumbers call it). I took a dental pick and a wire wheel on my Dremel, and picked at the aluminum for a while. It eventually came clean.
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Harpo
post Sep 13 2014, 05:13 AM
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My threads were damaged and I cleaned them up with a thread file. Took about 15 minutes but it worked like a charm

David
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cary
post Sep 13 2014, 08:50 AM
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I'll pick up a new wire wheel on the way to the shop. Then I'll do some picking and see if I can get it.
Called Hall Tool. They have a die, but its $30. And they're not open on the weekends.
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Elliot Cannon
post Sep 13 2014, 09:31 AM
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If the outside threads are totaled, you can tap threads on the inside and use a different fitting.
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Harpo
post Sep 13 2014, 06:52 PM
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Depending on the OD of the die the second (return) fitting might to too close to thread the die on. A thread file will fit between the two fittings. One metric file has two ends and four sides per end yielding eight common thread pitches. A whole lot cheaper than 8 dies.

http://www.amazon.com/Allstar-Performance-...d/dp/B003BZLK6O
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cary
post Sep 13 2014, 07:55 PM
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I have one of those. Won't fit up against the rib.
The wire wheel and the picks did pretty good. The thread file helped in a couple spots. I think if a had a steel nut I could finish it up .............

The aluminum one starts about 2 threads........... so i'm making progress.
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cary
post Sep 15 2014, 08:31 AM
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Did a little more research. Looks like the M18*1.0 is the only spindle nut that Nissan/Datsun has ever used. Comes in a Dorman kit or in a five pack.
I think I'll still get the die if its narrow enough to fit between the threads and the flange. I still five more cars awaiting restoration..............
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cary
post Sep 15 2014, 09:16 PM
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Die was a no go. Way too big. We have about .33" of space to work with. It would have needed about about .75" for the die to make a complete turn.

Stopped at my go to hardware store (Winks) to look for a nut. No go. They only went down to M18*1.5.

Ordered the Nissan spindle nuts at the flaps. Should be in first thing in the am.
I'm going make a thread restorer with one of them.
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cary
post Sep 16 2014, 09:08 PM
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Nuts did the job!

Attached Image

Attached Image

Cut a groove with a triangle file. Worked like charm.

Attached Image

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puffinator
post Oct 12 2014, 04:02 PM
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QUOTE(cary @ Sep 16 2014, 11:08 PM) *

Nuts did the job!

Cut a groove with a triangle file. Worked like charm.



same problem. would you sell one of your nuts?
Rob
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cary
post Oct 12 2014, 06:39 PM
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I can do that ..................
Going work in the middle of the night. So I might run out to my shop in the afternoon.
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Kansas 914
post Oct 13 2014, 09:38 AM
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QUOTE(cary @ Oct 12 2014, 06:39 PM) *

I can do that ..................
Going work in the middle of the night. So I might run out to my shop in the afternoon.

Can you confirm these are 18mm 1.0 threads? I need to do this as well. You might can make some decent money for these prepped with the "V" to cut threads for gas tanks.

I would buy one.
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cary
post Oct 13 2014, 06:51 PM
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Confirm : 18m * 1.0.
Might give it some consideration. But I'd need to buy a bigger V vile. And something to clean the threads with.
When you start to tidy up the threads The main thing is to use oil cutting oil.
Then only turn about a 1/4 to 1/3rd of a turn. Back it off. Clean it again.
Rinse and repeat.
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Eric_Shea
post Oct 14 2014, 07:07 PM
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QUOTE
would you sell one of your nuts?


(IMG:style_emoticons/default/blink.gif)

I knew it would come to this. Andy... time to shut'r down. (IMG:style_emoticons/default/sad.gif)
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Kansas 914
post Oct 14 2014, 07:10 PM
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QUOTE(Eric_Shea @ Oct 14 2014, 07:07 PM) *

QUOTE
would you sell one of your nuts?


(IMG:style_emoticons/default/blink.gif)

I knew it would come to this. Andy... time to shut'r down. (IMG:style_emoticons/default/sad.gif)

(IMG:style_emoticons/default/lol-2.gif)
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r_towle
post Oct 14 2014, 07:25 PM
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QUOTE(Eric_Shea @ Oct 14 2014, 09:07 PM) *

QUOTE
would you sell one of your nuts?


(IMG:style_emoticons/default/blink.gif)

I knew it would come to this. Andy... time to shut'r down. (IMG:style_emoticons/default/sad.gif)

Sure, someone talks about selling a nut and Eric comes out of hiding.
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Eric_Shea
post Oct 14 2014, 07:33 PM
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Not hiding. "still" at the shop. As you can see, I still have to vaccum. (IMG:style_emoticons/default/sad.gif)

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sbsix
post Oct 15 2014, 03:44 PM
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Eric, vacuuming and drinking beer do not mix.
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Kansas 914
post Oct 16 2014, 07:43 AM
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QUOTE(cary @ Oct 13 2014, 06:51 PM) *

Confirm : 18m * 1.0.
Might give it some consideration. But I'd need to buy a bigger V vile. And something to clean the threads with.
When you start to tidy up the threads The main thing is to use oil cutting oil.
Then only turn about a 1/4 to 1/3rd of a turn. Back it off. Clean it again.
Rinse and repeat.

Thanks Cary.

I am having a tough time sourcing these. Where did you get yours? Is there a Dorman number?
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