Top Hat Bolt Replacement?

[Dynamic Entry]

I am one of the people that has caused jamal stress lately in repeating himself.... but at least i took his advice

So i got GC8 spec footwork to keep the geometry the same. It came from japan and is quite tidy except


anyone have experience replacing a bolt here? I am heading to The Bolt Supply House tomorrow to see what they say. It's got little splines on the inside of the hole....

[ciper]

If you can get a matching diameter bolt its not extremely important for it to be pressed in like the old one. The "ring" around the middle and gravity does most of the work hold the parts together.

[Hocrest]

But if it's not pressed in, you'll have a hell of a time keeping it from spinning when you tighten the nut.

But if you get a couple of weld spots to hold the bolt, you'll be golden.

[ciper]

[Threshld1]

Why dont you press a stud out of your/an old tophat and press it into this one?

[Dynamic Entry]

mmmmmm lockkkkkk washersssss

the internal star one looks aggressive, will look for one tomorrow

I bought a grade 8 5/16ths bolt today with a split washer. figuring maybe I can get a wrench on the bottom of the bolt while tightening down the nut....

we'll see if I have the gumption to try this tomorrow, but it might rain all day......

i have no welder/access to one right now.

i don't think I can push the stud in/out because of the wide head on one end and the threads on the other. to be honest I am quite mystified as to how these are assembled.....

[ciper]

Well if you had a stud on its own you could use the new nut to "pull" the stud into its new home.

I bet you could put two nuts tightened against each other on an old stud then use a hammer to bang it out.

[Dynamic Entry]

I will try this. after looking again i noticed that the splines are a tiny bit wider than the threads so the stud should push out

we'll see

[Threshld1]

Yup, they are just a knurled press fit bolt. Same as how your lug bolts are attached. Get a BFH and go at it!

[n2x4]

Be careful when you torque those down. They aren't the toughest things - I tightened one clean off once.

[Dynamic Entry]

ha ha ha, it took me a second to process BFH. I had huge flashbacks of running around shooting big green balls of death at pixelated zombies

but I will find a hammer


about the torqueing, I will see if my haynes says anything about it and/or be attentive about it. thanks!

[ciper]

BFG9000 ftw!

[Dynamic Entry]

No Clipping FTMFW!

[ciper]

LOL idspispopd

[kleinkid]

The Haynes manual will give you a torque value for the nuts on those studs. Just for general info here is chart for torque values for metric size fasteners.

http://www.tpub.com/content/filters/TM- ... 3P_105.htm

[ciper]

Nice link Kleinkid but where are the 14mm bolts? The chart seems to confirm my usual torque of 15ft lbs.

[kleinkid]

Torque values are always determined by thread dia. and /or material. Not by the size of wrench used.

[Dynamic Entry]

eh?

well, to bring this thread back on track: hamering a stud out of a top hat is the easiest thing Evar. And pulling it into a new one is lso easy with vice grips.

My STi suspension is in now and I have 11 extra top hat studs too.