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View Full Version : S13 Seat bolt threads?

FourtyKid
03-13-2013, 07:47 PM
The rear left bolt hole in my S13 is stripped out. Does anyone know the thread pitch, so I can get a tap and re-thread it?

It's this one, if you didn't understand:

http://i.imgur.com/OIqKeZB.jpg
Hlsilver
03-13-2013, 07:55 PM
M12 x 1.25 or M10 x 1.25, not positive
FourtyKid
03-13-2013, 08:06 PM
M12 x 1.25 or M10 x 1.25, not positive

I Googled it and the results are all mixed.
This (http://forums.nicoclub.com/the-what-size-bolt-goes-here-thread-t474382.html#p5726564) says M10x1.25, but this (http://www.driftworks.com/forum/technical/166373-s13-seat-mounting-bolt.html) says 12x1.25....
KiLLeR2001
03-13-2013, 08:16 PM
M10 x 1.25.

I just pulled one off my car to verify.
FourtyKid
03-13-2013, 08:17 PM
M10 x 1.25.

I just pulled one off my car to verify.

Thank you! So this (http://www.use-enco.com/CGI/INSRIT?PMAKA=311-4261) will work to re-thread it, correct?
Yoci
03-13-2013, 08:50 PM
Killer is correct.
racepar1
03-13-2013, 09:08 PM
:werd:

M10x1.25

A tap won't fix it if the threads are stripped though. Cross-threaded, yes. Stripped, no. Maybe a helicoil or weld a new nut to the bottom of the floor.
godrifttoday
03-14-2013, 02:54 AM
Cheapest option is to buy (from me off course)

If stripped beyond repair!!!

Option 1 - buy "weld nuts" the flat ones, so all you do is drill out the hole and then you weld the nut in place with new threads and all!!! , this of course required a welder. ( for me this is the easiest solution )
Option 2- go a size bigger bolt size which is unlikely in this situation I might think.

But taps are expensive! Also, heli coil would wont work for this situation
The Dude
03-14-2013, 03:07 AM
Do yourself a favor and invest in a tap and die set. I have a $60 one from harbor freight that works fairly well. I have collected other sizes as time went on. If you plan on doing significant work on your car then you will eventually need this. Plus, it comes with thread gauges so you won't have to ask people on the internet what type of bolt you need.
godrifttoday
03-14-2013, 11:23 AM
For 80 bucks or so u can get a craftsman, lifetime warranty
The Dude
03-14-2013, 12:56 PM
The Harbor Freight set also has a lifetime warranty. I haven't seen the Craftsman set, but I imagine that it is slightly better quality.

I'm not as big of a fan of Craftsman these days as I think the quality of their stuff has gone down while the price has kept climbing. The drive sheared off my Craftsman torque wrench a while ago and the wouldn't take it back because it requires calibration (which, apparently, makes it not a "hand tool" and not subject to their lifetime warranty).

Sorry for the rant. Seriously, go pick up a tap and die set though.
racepar1
03-14-2013, 02:08 PM
The Harbor Freight set also has a lifetime warranty. I haven't seen the Craftsman set, but I imagine that it is slightly better quality.

I'm not as big of a fan of Craftsman these days as I think the quality of their stuff has gone down while the price has kept climbing. The drive sheared off my Craftsman torque wrench a while ago and the wouldn't take it back because it requires calibration (which, apparently, makes it not a "hand tool" and not subject to their lifetime warranty).

Sorry for the rant. Seriously, go pick up a tap and die set though.

Craftsman won't warranty ANY of my 3/8" ot 1/2" drive sockets anymore because they've been used on an impact gun. They're getting to be rather shitty about things.
FourtyKid
03-14-2013, 06:25 PM
A tap won't fix it if the threads are stripped though. Cross-threaded, yes. Stripped, no.

Well, it's weird, because I can thread the bolt by hand about 1/4" into the hole, then it just stops. But if I get a socket to thread it in, then it goes in, albeit a little tough.
racepar1
03-14-2013, 06:36 PM
Well, it's weird, because I can thread the bolt by hand about 1/4" into the hole, then it just stops. But if I get a socket to thread it in, then it goes in, albeit a little tough.

Then it's not stripped, the threads are just damaged. A tap would fix that right up. Stripped threads are when the threads are COMPLETELY pulled out of the hole. A tap won't fix that because the hole is too big at that point to re-tap threads into. The drilled hole is smaller than the OD of the tap. It has to be in order to have material to tap threads into. Once you pull the threads out the hole is now the same ID as the tap's OD so there is no material for threads.