Porsche 997 exhaust screws wow....

[YoungMD]

So a technical question i hope somebody can help me with, i'm trying to get the nuts off a triangular exhaust joint (one from manifold to cat) and it seems like its a retaining nut, but porsche say its just rusted on? Before i take off the cat to get to the joint properly has anybody done this /know i mean? Oh and need to get the nut iff as the bolt has rusted through and no longer holding the other side of exhaust.....see pick below

[YoungMD]

[hondansx]

Can't really help, but feel your pain. When fitting an aftermarket exhaust i ended up hacking the OEM to bits because of all the rust. Luckily when i sold the car the buyer was chuffed with the Sharkwerks being on!

[PorscheGT4]

they all do it, you will have to cut them off.

[YoungMD]

The nuts and bolts are absolutely rusted away to nothing whilst the rest of the underneath is fine and the orginal exhaust, very strange .....

[YoungMD]

The nuts and bolts are absolutely rusted away to nothing whilst the rest of the underneath is fine and the orginal exhaust, very strange .....

[Trev450]

Mine was exactly the same so had them all replaced with stainless ones at the last service

[chrisABP]

They are all the same unfortunately and we tend to replace the studs (coming out of the cat flange) with new stainless steel bolts and flange nuts.

Knowing this we always supply a new set of stainless steel bolts and nuts with the Sharkwerks exhausts we send out for all 997.2 cars.

[harleywilma]

Just had this done at my local Indy,Its very common apparently!!!

[YoungMD]

I see there are a fair few stainless steel nut and bolt sets around which must be worth the investment....why did porsche not put something like that on

[Trev450]

For the same reason that they used poor quality liner coating - cost.

[cd1957]

Hi yes the stud and nuts are mild steel,the real issue is that they
use splined in studs at the factory,you will have to heat the stud to
red hot and then hit the stud out of the fixed steel spacer that it fits into.

Chris

[Spyder3400]

FYI the Porsche replacement part is a different part number to the original, I'm guessing it's a better quality. For what its worth the C4S I had the original bolts and nuts had completely dissolved within 9000 miles!

Edited by Spyder3400 on Wednesday 28th October 14:33