Broke a bolt...need some advice.
#1
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
In preparing for my new sharkwerks exhaust, I took off the center muffler this afternoon. However, on the passenger side where the center muffler bolts to the cat I broke a bolt while loosening the nut as you will see in the picture. Yes I used penetrating oil. Yes I worked the nut back and forth. I tried using a punch (as gently as I could) to get it out but had no luck. The head of the bolt is round which makes me think that the hole where the bolt goes through on the cat is threaded.
Anyone know if it's threaded or not? Thanks.
Anyone know if it's threaded or not? Thanks.
#4
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
It is a splined bolt. I'll try taking a torch to it tomorrow and see if I can punch it out. Now I have to find a replacement bolt....not too common obviously. Thanks for the responses.
Trending Topics
#8
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I had mine break on the center muffler part and used a m8 hex bolt. No reason you couldn't use a hex bolt. While I was at it I replaced all the nuts with new ones, you can find the nuts at Home Depot in the hardware section. They are tapered slightly on one end to make them lock. This is not to be confused with the locking style nuts that have a nylon insert, those would clearly melt in an exhaust application. Also, a little graphite lube when reinstalling is not a bad idea to make removal easier down the road. Good luck with the fix.
#12
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Porsche sells that bolt as well. I picked a couple of those up when I got ready to do my spark plugs.
It's just a regular M8 bolt of certain length. I've even seen those at home depot and such.
L
It's just a regular M8 bolt of certain length. I've even seen those at home depot and such.
L
#14
AutoX
Join Date: Feb 2014
Location: Greater Atlanta Area
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
If you do go to Home Depot or the hardware store, just make sure the bolt is graded.
Grade 5 should be sufficient, grade 8 is stronger. Steel Socket head or Allen head bolts are even stronger equivalent to like a grade 10.
If it is graded, it has to reach a minimum standard rating no matter where it is made.
JJF3
Grade 5 should be sufficient, grade 8 is stronger. Steel Socket head or Allen head bolts are even stronger equivalent to like a grade 10.
If it is graded, it has to reach a minimum standard rating no matter where it is made.
JJF3
#15
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
If it's pressed in, I would try and cobble something together using a C clamp with a socket such taped to the one end so that the stud can be squeezed out the backside.