Y pipe help

[crute/higgins350z]

Hi all, just replacing the y pipe on on 2003 350z and struggling to get the studs/ bolts&nuts to replace at the same time. I've tried nissan but they want quite a lot for them so I'm looking for an alternative or maybe I won't need to replace them when I do the job (advice would be gratefully appropriated)

Cheers all

[coldel]

Moved to the right place, also would suggest you speak with Zmanalex he tends to have plenty of everything lying around

[Yorkie]

It's best to replace all the hardware when changing over the pipe so remove the studs from the cat to y-pipe join and then you can just fit new bolts all the way through instead.

 

I just swapped over my y-pipe myself and would recommend you get six M10 40mm hi-tensile steel 8.8 bolts. You can order these from eBay for under £5.

Edited April 19, 2017 by Yorkie

[crute/higgins350z]

Hi Yorker, thanks for your help and advice. Been chatting to zmanalex today who has helped me go in the write direction.

I got the bolts I should need locally and going to carry out the replacement Saturday and fingers crossed it goes well. The current bolts/nuts on the cat look pretty bad. :/

[Yorkie]

If it's rusty then this job can turn into a total nightmare, if things get out of control your local exhaust place can help with removing studs with heat etc, best of luck pal

[crute/higgins350z]

Thanks Yorkie, I'm lucky enough to work at a dealership so the guys can help if I get really stuuck. I Had to replace part of my exhaust on my daily a while ago and those bolts was corroded so I had to get the blow torch to to do that job so I know what you mean- can be a dam nightmare. Anyway I guess we'll see Saturday how it turns out. Thanks for all your advice fella, real nice of you. ðŸ‘

[Yorkie]

You're welcome mate, hope its not too painful.

 

I can almost guarantee that you will be needing that torch again.

 

In the end I used an angle grinder to cut off the nuts from the studs (takes ages with little space under jacks), removed the y-pipe, then added heat to the cat flange + stud to hammer the studs out. Think the cat studs have splines, so no threads, so they are easy to heat and hammer out.

[crute/higgins350z]

It sounds more fun by the minute, I have the advantage of using it on a proper workshop lift so I hope that makes it easier too. Great heads up on the cat studs-I'll bear that in mind when I'm doing it. Out of interest which or where did you get your y pipe from??

[Yorkie]

That'll make the job far easier.

 

I bought a reasonably damaged milltek y pipe from these forums

[crute/higgins350z]

Ok, cool.

I think I'll post on here how it go s for future uses in my position.