Knucklehead moment  By  scooterpookin (Read 3,771 times)

i would try to tap it with the original size bolt see if that works if not go up one size that will definitely work youll just have two different size bolts.. if you try to glue it next time you want to take it off itll be a getting out and youll have to clean the hole out then reglue it and thats no fun. also you would have to get some really high temp glue otherwise itll break down on you at some point when your riding and that wont be good either.

my advice do it the right way.

Do it right.

Time for a Heli-Coil

I would tap it. Sorry but I know JB weld is good stuff, but I just wouldn't trust it for a long term solution. And if you should decided later or have no choice but to fix it right. removing the JB weld is just going to be one more problem you have to address.

www.harborfreight.com/40-piece-metric-carbon-steel-tap-and-die-set-39384.html

There is no way JB Weld would last for any length of time right at the exhaust port of the cylinder head.

www.lowes.com/Search=tap+and+die+sets?storeId=10151&langId=-1&catalogId=10051&N=0&newSearch=true&Ntt=tap+and+die+sets#!

But still your best deal is the one I posted previously from harbor freight.

www.harborfreight.com/40-piece-metric-carbon-steel-tap-and-die-set-39384.html?hftref=cj

For the larger stud, I would look at threaded rod from Ace Hardware, they should also have the right size larger nut. Just find the size you need and cut it to the proper length, then clean up the ends on a grinder.

What size do you want to make your threads? For instance, homedepot.com has a 3/8-16 tap for 5 dollars. Add in a few more dollars for a drill. You can get a chart that shows you what drill you need. Let's say you had a 1/4" bolt in a hole and it stripped. The hole should be close to 1/4" (.250) at this point. Look at what tap uses a hole about that size. In this case, a 5/16-18 would be a good choice. It uses a size "F" (.257) drill. In aluminum, a .250 hole would be fine for this tap and you would not even need to drill it out. If you do not know how to use a tap, you should watch some videos. You can use an adjustable wrench to turn the tap but a tap handle is nicer. If anything is unclear just ask and I'll help you. If I am over-explaining then sorry in advance. use some tapping fluid, wd40 or something as a lube. even vegetable or motor oil should work in a pinch.



Here is a metric tap chart.


An m5 has an outside diameter of 5mm. If your bolt stripped and left you with a 5mm hole, the nearest drill size is a 5mm drilled hole for an m6X1 tap. If the hole is out of round or oversized or otherwise damaged, you might want to upsize to an m8. Acehardware.com has a metric tap and die set for 15 and 20 dollars. Ebay has a set with a handle for 8 dollars and free shipping. They also have an m8 helicoil kit for 15 dollars. a drill bit is another 3 or 4 dollars. 

for later use, you can often find big nice 115 piece drill sets on sites like msc. they have one for about 100 dollars plus 25% off. I used to see them on special for $20, many years ago.

Keylocking inserts from grainger.com would be the best, if slightly expensive, solution.

As a professional mechanic I hate helicoils as they need a special tool to implement. Jus'sayin my .02$