stripped threads

[dsrtuckteezy]

is there anybody who makes a damn m15 or m16 plug/bolt/insert with a 1.25 pitch?

they seem non existant, only 1.5 pitch.

the oil drain plug hole on my bike was stripped out, had a buddy fix it couple years ago, but on this last oil change the plug seized to the insert and pulled it out.

fucked up the insert trying to get it off the plug, so now i'm at a stand still.

existing threads in the sump are good, i just need a new insert or plug

[Kart21]

Got out the Metric Heilcoil book and don't see anything M15 /M16 with a 1.25 pitch.

Is it a Honda by chance, I know they make "speical" bolts for just them.

Good luck, Shifter kart is some "speical' size.

[dsrtuckteezy]

original hole was m14-1.25. insert that was pulled out appears to be 16mm.

would a double oversize 14mm fit? anybody make one?

or what would be the standard equivalent to 16mm? fine thread the same as 1.25? just trying to make something work.

there's a m17-1.5 repair kit on ebay, but i dont think one size bigger is enough to cut a bigger pitched thread, and that's the limit i can go to on this sump.

[dsrtuckteezy]

I Think NAPA has them. Kart shifter motor size. Just not sure of the pitch.

Under a long shot try Turners Hardware in Farmers Branch.

Pitch, as you say , is the issue.

yea, anything bigger than 14 that ive come across is 1.5 or better.

[Kart21]

Steel or Aluminum.

I have a 3/4 inch heilcoil kit with a few insert but that pretty big and they are ove 1/2 inch long. might not have enough material to grip.

[dsrtuckteezy]

yea 3/4 is too big. i'm trying to do this with the sump on the bike and use the existing threads as there's not enough meat on the wall to go any bigger.

17 is the biggest i can go and that's not big enough to cut new 1.5 threads.

i think i can use the tap out of m14-1.25 repair kit, but the sump has to come off because the tap is too long and theres a straining screen right above the drain hole. and that requires removing the header which is pita since the bolts are prone to snapping, then you have a more serious problem.

of course i can have a company custom make a plug, but every one i've run across has like a 1000 unit order limit lol

[lilvega]

Here is a die. Make your own bolt.

[ame]http://www.amazon.com/Metric-Right-Thread-1-25mm-Pitch/dp/B008400IB4[/ame]

Here is the tap to fix the hole.

[ame]http://www.amazon.com/Metric-Right-Thread-1-25mm-Pitch/dp/B0085H01DG[/ame]

Some NAPA stores have odd pitch taps/dies on the shelf. When I was putting my VR4 motor together I chased some threads with pretty odd taps.

[lilvega]

This stuff works really well. Reparied many threads with it. You might be able to salvage what you have using this.

http://compare.ebay.com/like/190783300101?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar

Autozone used to carry it. I imagine they still do.

[dsrtuckteezy]

Here is a die. Make your own bolt.

http://www.amazon.com/Metric-Right-Thread-1-25mm-Pitch/dp/B008400IB4

Here is the tap to fix the hole.

http://www.amazon.com/Metric-Right-Thread-1-25mm-Pitch/dp/B0085H01DG

Some NAPA stores have odd pitch taps/dies on the shelf. When I was putting my VR4 motor together I chased some threads with pretty odd taps.

the hole is good.

ok this is new to me, how does the die work?

i would need a bolt preferably with a fixed collar, where can that be had?

[lilvega]

A die is the opposite of a tap. If the treads of a bolt are messed up, a die can repair or re-cut the threads. You can also cut a new bolt from scratch of you can get round rod the right size or have access to a lathe.

[lilvega]

Smaller scale but same principle.

http://youtu.be/gVcwjjBAT4Q

[dsrtuckteezy]

A die is the opposite of a tap. If the treads of a bolt are messed up, a die can repair or re-cut the threads. You can also cut a new bolt from scratch of you can get round rod the right size or have access to a lathe.

so a die is meant to be used in a machine? i dont have access to a lathe.

i think the problem there would be finding a blank 16mm bolt to the specs i need.

[lilvega]

No machine required to use a die.

Slap some JB weld on the helicoil insert and put it back in. Put anti-seize on the plug and go.

[dsrtuckteezy]

No machine required to use a die.

Slap some JB weld on the helicoil insert and put it back in. Put anti-seize on the plug and go.

how do you do it then with the one you posted?

man i really wish i wouldve just put it back in with the insert stuck on the plug, but i was advised not to, and i already chewed it up trying to get it off the plug.

this is how it came out



this is kind of ghetto, but would cutting the threads off this, then cutting it down to the size i need and using a die on it work?

[lilvega]

how do you do it then with the one you posted?

man i really wish i wouldve just put it back in with the insert stuck on the plug, but i was advised not to, and i already chewed it up trying to get it off the plug.

this is how it came out



this is kind of ghetto, but would cutting the threads off this, then cutting it down to the size i need and using a die on it work?

Yes. If you cut it to the right length and the shoulder was the proper size it would work.