05-04-2017, 04:16 PM
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#9 (permalink)
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Enthusiast Member
Join Date: Nov 2016
Location: Ohio
Posts: 261
Drives: 2016 370Z
Rep Power: 953
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Quote:
Originally Posted by Jayhovah
Ahh yes the "Demon Bolts"... OP search the forum for that term and you will find a lot of information about the pains of removing the factory cats.
My advice:
1) Soak the demon bolts in penetrating oil the day before (at least)
2) Remove the intakes so you can get straight on them with long extensions. You don't want to be messing around with swivels and wobbles.
3) Use 1/2" drive socket/extensions with either a large breaker bar or a powerful air powered impact wrench.
4) Use a 6 point socket. A 12 pointer will just round the thing off faster.
5) Keep bolt extractors on hand... there is a good chance you will start to round one or both of them off. My drivers side was so frozen on I had to put the bolt extractor and two of us were pulling/stabilizing a huge breaker bar and eventually the bolt just broke off to free the cat.
You can find pics of my demon bolts and the tools I used to get them out in my pic dump thread (check sig).
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X2! I wish I had seen this before I started. I also came to the same conclusion. The only way to get to them is run extensions all the way to the front of the car up near the intake. Ideally with 1/2" extensions to prevent flex, so you aren't fighting yourself with the flex of 3/8 stuff.
My factory catback was out in literally 30 minutes. I spent hours on the cats, because of those bolts. Once those top two bolts were out everything else was easy. Even putting new bolts in for the new cats was easy.
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