Exhaust bolt Q

[Richard_Hamilton]

If it lists separate parts, that is what they must be. For it to be an interference fit, I think they would use a special bolt with a tolerances waist. However, my advice with exhausts would be that "if it ain't broke, don't try to fix it". New ones will only rust again, and you'll be in the same place when you actually need to remove them. And steer away from the manifold to head bolts unless you are a masochist.

 

[Chris_in_the_UK]

Thanks Richard Maybe I have a high spirit of adventure!! I suspect they have all been on for the life of the car (since beginning of 2006). I will have another look when I do a couple of small jobs underneath later next week - the confusing part of the parts list is that whilst it itemises it in the numerical list and on the diagram there is an 'X' in the quantity column? EDIT - just found a thread on Planet 9, they are a stud with a splined end that is pressed into the flange on the header/cat assembly. Seems some people have experienced breakages along the way.........! Cheers

ORIGINAL: Richard Hamilton If it lists separate parts, that is what they must be. For it to be an interference fit, I think they would use a special bolt with a tolerances waist. However, my advice with exhausts would be that "if it ain't broke, don't try to fix it". New ones will only rust again, and you'll be in the same place when you actually need to remove them. And steer away from the manifold to head bolts unless you are a masochist.

 

[Chris_in_the_UK]

All

Looking at swapping the rusty bolts and clamps on my Cayman S exhaust system.

I have successfully swapped the clamps and bolts for the tailpipe T piece and the tailpipe and am looking at further up the system now. There are 3 bolts on each side that clamp the flanges of the main system to header/cat assemblies.

The parts diagram lists both an M8 x30 bolt and an M8 nut but it's not clear from the parts list or diagram if this is a loose bolt or if it is pressed into the header/cat assembly flange making it effectively captive.

Any experiences or assistance greatly received!

Chris

 

[Tilley]

The flange bolts seem to be a pain - the OPC did mine after I chickened out. Seems to be a drill out and replace - but the mechanic did say the replacement bolts are better quality than the 2006 model! Best of luck if you go the DIY route []

 

[Chris_in_the_UK]

UPDATE Had a good look today when I changed the rear pads etc. Strange thing is the nuts seem to have almost dissolved whilst the studs look like new? Most odd....

 

[Richard_Hamilton]

You should have seen the ones on my Turbo. Completely unrecognisable as hex nuts.

 

[Giff]

They are splined and pressed in to the collar on the cat side of the flange.

 

[Chris_in_the_UK]

UPDATE Today was the day...... Drivers side - took 3 hours, ended up having to cut the remains of the nuts off with a Dremel and then the spot weld for the studs. Drifted the studs out and new gasket, stainless bolts/nuts fitted. Passenger side - 2 of the nuts completely 'dissolved' !! remaining nut gave in in 15 mins - drifted the studs out after grinding the spot welds off. Again, new gasket, stainless bolts and nuts fitted. What a £$%&*% job!.