Question about catalytic converter bolts

kevinyvng · 06-10-2018, 05:28 AM

Hi guys, fellow Z noob here.

I just have a quick question about swapping back on my oem cats for emission testing because I just got state reffed last week by the Santa Ana CHP.

Just like many other owners, each side of my cat have a stud that is completely broken off and has a half inch thread left over. Can I just tighten the two out of the three bolts/nuts? It'll be a 10 minute drive down to the nearest state referee station, or will I have an exhaust leak and not pass the testing.

If it will cause issues instead, I'll try to drill it out, but just a bit of hassle. Sorry if this have been posted in the forums before, I don't really know what to search for about this topic. Thanks!

NorthStyle · 06-10-2018, 06:29 AM

Why not just drill it out and replace it with a test pipe/HFC bolt from what you're currently using? Using 2/3 might result in an exhaust leak so no need to even chance it.

Rusty · 06-10-2018, 03:53 PM

Drill it out. Otherwise you will have an exhaust leak. Why take a chance.

06-10-2018, 05:28 AM	#1 (permalink)
kevinyvng Base Member Join Date: Jun 2016 Location: California Age: 27 Posts: 19 Drives: 16 Nissan 370z Nismo Rep Power: 10	Question about catalytic converter bolts Hi guys, fellow Z noob here. I just have a quick question about swapping back on my oem cats for emission testing because I just got state reffed last week by the Santa Ana CHP. Just like many other owners, each side of my cat have a stud that is completely broken off and has a half inch thread left over. Can I just tighten the two out of the three bolts/nuts? It'll be a 10 minute drive down to the nearest state referee station, or will I have an exhaust leak and not pass the testing. If it will cause issues instead, I'll try to drill it out, but just a bit of hassle. Sorry if this have been posted in the forums before, I don't really know what to search for about this topic. Thanks!

06-10-2018, 06:29 AM	#2 (permalink)
NorthStyle A True Z Fanatic Join Date: Aug 2015 Location: Deutschland + SC/FL USA Posts: 1,309 Drives: 2011 370Z Nismo Rep Power: 24278	Why not just drill it out and replace it with a test pipe/HFC bolt from what you're currently using? Using 2/3 might result in an exhaust leak so no need to even chance it. kevinyvng likes this.

06-10-2018, 03:53 PM	#3 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,526 Drives: 2011 Nismo GM 6M Rep Power: 2684439	Drill it out. Otherwise you will have an exhaust leak. Why take a chance. kevinyvng likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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