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Exhaust material

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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TONYL
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Exhaust material

Post by TONYL » Sun Aug 21, 2016 3:41 pm

Hi all
I have a 2010 3.0 and was wondering if the exhaust was stainless steel or mild steel
Thanks
Tony
318ci m sport coupe
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35i-Nut
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Exhaust material

Post by 35i-Nut » Tue Aug 23, 2016 2:26 pm

it will be mild steel

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Marlon
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Exhaust material

Post by Marlon » Tue Aug 23, 2016 2:33 pm

35i-Nut wrote:it will be mild steel
That's surprising, the previous models E85/E86 were all stainless steel I believe.
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Machine monkey
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Exhaust material

Post by Machine monkey » Tue Aug 23, 2016 2:41 pm

100% stainless steel on all models of the 85/86 BMW seem to value the exhaust as a life long part :thumbsup:

I would also be very suppressed if its mild steel on the 89.
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!

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GuidoK
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Exhaust material

Post by GuidoK » Tue Aug 23, 2016 8:23 pm

Its not the highest grade stainless steel though....
"stainless" so to speak :lol:
But it doesnt rust through, its just some surface flaking.
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch

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Exhaust material

Post by Machine monkey » Wed Aug 24, 2016 7:28 am

GuidoK wrote:Its not the highest grade stainless steel though....
"stainless" so to speak :lol:
But it doesnt rust through, its just some surface flaking.
Mine dose not have any serface flaking on it at all? And when welding them they weld lovely. Your right they are not the best stainless. But they are a lot better than what many cars have. 100% Not mild steel.
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!

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TONYL
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Exhaust material

Post by TONYL » Wed Aug 24, 2016 8:29 am

If you weld it do you have to use stainless or will it weld using normal mild steel mig welding
318ci m sport coupe
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Machine monkey
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Exhaust material

Post by Machine monkey » Wed Aug 24, 2016 8:35 am

TONYL wrote:If you weld it do you have to use stainless or will it weld using normal mild steel mig welding
Its better to use stainless wire. As it wont rust but it will fuse fine buddy :thumbsup:
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!

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Exhaust material

Post by GuidoK » Wed Aug 24, 2016 11:48 am

Machine monkey wrote:
Mine dose not have any serface flaking on it at all?
Yours is shiney? pics or it didnt happen :wink:

Usually they look like this:
Image
Flakes and spots are definately showing. The material is 304 or less. (stainless doesnt mean it wont rust, especially when it gets hot. Its also not passified at the factory, see the welds)
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch

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Exhaust material

Post by Machine monkey » Wed Aug 24, 2016 11:54 am

GuidoK wrote:
Machine monkey wrote:
Mine dose not have any serface flaking on it at all?
Yours is shiney? pics or it didnt happen :wink:

Usually they look like this:
Image
Flakes and spots are definately showing. The material is 304 or less. (stainless doesnt mean it wont rust, especially when it gets hot. Its also not passified at the factory, see the welds)
:rofl: :rofl: Ah come on its been under a car for 10 years!! I think that looks bloody good. If it was a Pugeot it would have had a new one every other year!!!
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!

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Exhaust material

Post by GuidoK » Wed Aug 24, 2016 12:48 pm

I'm not saying it doesnt look good or that it's not functional, I just said its fairly low grade stainless steel.
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch

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Machine monkey
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Exhaust material

Post by Machine monkey » Wed Aug 24, 2016 1:01 pm

GuidoK wrote:I'm not saying it doesnt look good or that it's not functional, I just said its fairly low grade stainless steel.
Ok your right i am wrong :thumbsup: :rofl:
My little blue zed is in lots of bits. With lots of things started and not many finished! I may have found the limits of my time and ability!!

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Exhaust material

Post by ronk » Wed Aug 24, 2016 7:44 pm

In the "olden days" exhaust systems used to last three years - a pal has my my 2004 E85 with the original system on it - it has to be stainless or at least a high chromium steel.
Who gives a stuff what grade it is if it lasts 12 years or more. :thumbsup:
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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