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35is: Replace exhaust tips. How?

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Philly_Sweden
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35is: Replace exhaust tips. How?

Post by Philly_Sweden » Fri Mar 02, 2018 10:32 am

Hello.

I have seen some pics of the exhaust off the car but I still haven't found an answer.
Are the OEM tips spotwelded? I like the stock sound actually but want to replace the tips.

Does anyone know the outer diameter of the pipe connteced to the tip?

Thinking about 90mm tips.

Thanks :)

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35is: Replace exhaust tips. How?

Post by markplant » Fri Mar 02, 2018 10:50 am

Mr Wilks had his done on his 35i , iirc
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35is: Replace exhaust tips. How?

Post by Philly_Sweden » Fri Mar 02, 2018 11:18 am

markplant wrote: Fri Mar 02, 2018 10:50 am Mr Wilks had his done on his 35i , iirc
Correct.
And Another question is if you need to remove the exhaust to replace just the tips?

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35is: Replace exhaust tips. How?

Post by mr wilks » Fri Mar 02, 2018 11:37 am

Philly_Sweden wrote: Fri Mar 02, 2018 11:18 am
markplant wrote: Fri Mar 02, 2018 10:50 am Mr Wilks had his done on his 35i , iirc
Correct.
And Another question is if you need to remove the exhaust to replace just the tips?
Mine were cut off without removing bumper or boxes , then new ones welded on , took around 30mins for both sides , unsure of the sizes though the new ones i believe are 90mm :thumbsup:
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35is: Replace exhaust tips. How?

Post by Bombardino » Fri Mar 02, 2018 12:14 pm

mr wilks wrote: Fri Mar 02, 2018 11:37 am
Philly_Sweden wrote: Fri Mar 02, 2018 11:18 am
markplant wrote: Fri Mar 02, 2018 10:50 am Mr Wilks had his done on his 35i , iirc
Correct.
And Another question is if you need to remove the exhaust to replace just the tips?
Mine were cut off without removing bumper or boxes , then new ones welded on , took around 30mins for both sides , unsure of the sizes though the new ones i believe are 90mm :thumbsup:
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35is: Replace exhaust tips. How?

Post by Philly_Sweden » Fri Mar 02, 2018 2:05 pm

Bombardino wrote: Fri Mar 02, 2018 12:14 pm
mr wilks wrote: Fri Mar 02, 2018 11:37 am
Philly_Sweden wrote: Fri Mar 02, 2018 11:18 am

Correct.
And Another question is if you need to remove the exhaust to replace just the tips?
Mine were cut off without removing bumper or boxes , then new ones welded on , took around 30mins for both sides , unsure of the sizes though the new ones i believe are 90mm :thumbsup:
Dito
Yes but did he cut of the whole pipe or just the spotwelded tip ON the pipe?

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35is: Replace exhaust tips. How?

Post by step_change » Fri Mar 02, 2018 4:06 pm

I thought the two segments joined at the rear from a common manifold at the engine end? So do 1,3,5 and 2,4,6 feed different sides of the exhaust?
Why is the box on the right smaller than the one on the left?
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35is: Replace exhaust tips. How?

Post by SteveSmith » Fri Mar 02, 2018 4:24 pm

step_change wrote: Fri Mar 02, 2018 4:06 pm I thought the two segments joined at the rear from a common manifold at the engine end? So do 1,3,5 and 2,4,6 feed different sides of the exhaust?
Why is the box on the right smaller than the one on the left?
They join in the middle so it makes no difference.
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35is: Replace exhaust tips. How?

Post by Bombardino » Fri Mar 02, 2018 5:07 pm

Philly_Sweden wrote: Fri Mar 02, 2018 2:05 pm
Bombardino wrote: Fri Mar 02, 2018 12:14 pm
mr wilks wrote: Fri Mar 02, 2018 11:37 am Mine were cut off without removing bumper or boxes , then new ones welded on , took around 30mins for both sides , unsure of the sizes though the new ones i believe are 90mm :thumbsup:
Dito
Yes but did he cut of the whole pipe or just the spotwelded tip ON the pipe?

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35is: Replace exhaust tips. How?

Post by Busterboo » Sat Mar 03, 2018 2:18 am

Aren't the tips an interference fit and don't they just turn off?
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35is: Replace exhaust tips. How?

Post by Philly_Sweden » Sat Mar 03, 2018 6:02 am

Busterboo wrote: Sat Mar 03, 2018 2:18 am Aren't the tips an interference fit and don't they just turn off?
Looks welded to me

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35is: Replace exhaust tips. How?

Post by srhutch » Sat Mar 03, 2018 9:08 am

Wouldn’t have thought they would cut where your top line is due to valve. Just grind back the spot welds.
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35is: Replace exhaust tips. How?

Post by Bombardino » Sat Mar 03, 2018 2:06 pm

I had the pipe cut back just short of the bypass pipe, the new tail pipes are then welded in place, all done without removing the bumper.

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35is: Replace exhaust tips. How?

Post by Philly_Sweden » Sat Mar 03, 2018 3:27 pm

Bombardino wrote: Sat Mar 03, 2018 2:06 pm I had the pipe cut back just short of the bypass pipe, the new tail pipes are then welded in place, all done without removing the bumper.
Do you have any pics to share?

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35is: Replace exhaust tips. How?

Post by Bombardino » Sat Mar 03, 2018 5:44 pm

Not the best photos but as good as you get until the snow disappears.
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