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Old 07-13-2020, 11:29 AM #1
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Removing stripped seat bolt

The front left seat bolt on the drivers side in my 02 is cross-threaded/stripped the seat wobbles and I can't back it out or screw it any further in. Any thoughts on how best to remove it?
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Old 07-13-2020, 11:35 AM #2
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Use a small flat pry bar or a' flat screw driver and apply upward force on the head of the bolt while loosening it.
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Old 07-13-2020, 12:19 PM #3
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Quote:
Originally Posted by spartacus View Post
Use a small flat pry bar or a' flat screw driver and apply upward force on the head of the bolt while loosening it.
Actually, on that particular bolt, this may not be the best approach. It's probably not stripped, rather the thread has corroded and the weld-nut has broken free from the sheet metal of the floor contour it is welded to. This is pretty common. You can try the pry bar, but it probably won't work and if you force it hard with the pry bar, you will just rupture the sheet metal and do more damage to the floor. Pressure with the pry-bar is unlikely to secure the nut if the sheet-metal could not hold it,

There is no easy way. I would try to dremel the head of the bolt off. You could also drill the head off, but it might spin on you. If you have to, then just go violent and just pry the base up without trying to turn the bolt until the nut busts through the sheet metal. Then you still have to cut the bolt out of there.

The fix is easy. Just get a longer bolt and drill through the lower floor and put a nut and a big fender washer on the underside of the truck. Cover with RTV to seal. That's worked fine for me and many others.

Some people of the OCD persuasion have welded in new sheet metal or inserted a new nut through a slot cut into the side of the contour. Search and you will find them.
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Old 07-13-2020, 02:01 PM #4
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Thanks … I've already tried prying up on the head of the bolt with no luck. The explanation of the weld-nut breaking free makes a lot of sense. I can definitely cut the bolt with a Dremel, but was concerned about how I would get the remaining portion out. Sounds like cutting it out is my only option (other than just ripping it out, which would probably cause more damage).
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Old 07-13-2020, 03:34 PM #5
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Quote:
Originally Posted by MrEMan View Post
Thanks I've already tried prying up on the head of the bolt with no luck. The explanation of the weld-nut breaking free makes a lot of sense. I can definitely cut the bolt with a Dremel, but was concerned about how I would get the remaining portion out. Sounds like cutting it out is my only option (other than just ripping it out, which would probably cause more damage).
You can just leave it, or fish it out with a magnet if you are lucky.
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Old 12-04-2020, 10:33 PM #6
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the welded nut for my driver's seat is now loose and was wondering if somebody could kindly measure the original center-center spacing of the two front bolts of the driver's seat? the seat frame on mine is wiggling so i can't base the correct measurement on the seat frame.

i'm planning to weld a nut to a piece of sheet metal and weld it to where the nut was originally welded.
Thank you.
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Old 12-05-2020, 09:37 AM #7
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From the center of the other hole and from the pinch weld of the rocker.

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Old 12-05-2020, 08:59 PM #8
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my bolt ripped out due to sheet metal fatigue. I posted my solution here. hope it makes sense.

Front seat bolt thread ripped out of floorboard
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Old 12-05-2020, 09:09 PM #9
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I welded mine to a washer then drilled and pop riveted it in. I would weld it in after in place though. Pop rivets can wiggle some ad welding is solid. That crossmember the nuts are welded to inside is kinda on the thin side. These nuts never should tear through. Design flaw.

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Old 12-06-2020, 04:02 AM #10
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Thanks man! Appreciate it!

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From the center of the other hole and from the pinch weld of the rocker.

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Old 05-07-2023, 04:44 PM #11
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Does anyone know what size the seat bolt is? I need to order a tap & die to fix boogered threads. Looks like it might be M10x1.0.
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Old 05-08-2023, 10:33 AM #12
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Odd. I have an issue with this same bolt. It just spins freely and I cannot screw it further in or out. Even with apply upward pressure.
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Old 05-08-2023, 12:25 PM #13
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The nut in the back came loose. Hence why it's stripped..

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Old 05-09-2023, 09:40 AM #14
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Quote:
Originally Posted by sneezye View Post
Does anyone know what size the seat bolt is? I need to order a tap & die to fix boogered threads. Looks like it might be M10x1.0.
I have to check. Probably be a few days.

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Old 05-17-2023, 09:18 PM #15
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Quote:
Originally Posted by sneezye View Post
Does anyone know what size the seat bolt is? I need to order a tap & die to fix boogered threads. Looks like it might be M10x1.0.
That bolt is p/n 90119-10825 *** STD. PART. The 10 right after the hyphen means it is an M10. Toyota M10s are usually 1.25 thread. This list has never done me wrong:

Quote:
There are four primary considerations for spare bolts and nuts: (1) diameter, (2) pitch, (3) class (strength rating), and length (bolts only). Toyota was nice and standardized on only one pitch for each thread diameter, as follows:

6 mm diameter - 1 mm pitch (iso course) - requires 10 mm wrench to fit head / nut
8 mm diameter - 1.25 mm pitch (iso course) - requires 12 mm wrench to fit head / nut
10 mm diameter - 1.25 mm pitch (iso fine) - requires 14 mm wrench to fit head / nut
12 mm diameter - 1.25 mm pitch (iso other) - requires 17 mm wrench to fit head / nut
14 mm diameter - 1.5 mm pitch (iso fine) - requires 19 mm wrench to fit head / nut
16 mm diameter - 1.5 mm pitch (iso fine) - requires 22 mm wrench to fit head / nut
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