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Problem with a Recalcitrant Tube & Nut


Go to solution Solved by 2002#3,

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Return to vendor, address unknown, make it better or refund me plus shipping.

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If everybody in the room is thinking the same thing, then someone is not thinking.

 

George S Patton 

Planning the Normandy Break out 1944

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Posted (edited)

Looks like it's too late to urge you not to grind on the header, hope it does not crack there. Probably also just ground away any chance of returning so....Put a small head nut there, just there.

 

Edited by tech71

76 2002 Survivor

71 2002 Franzi

85 318i  Doris

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^ I will disagree.  I've seen the IE shorty and ss downpipe push out a couple hp over the 2002tii header.   However, I've seen a different shorty lose power.

 

5] Try not fully seating the header right away.  Hang the header flange on the ends of the studs so that they're barely poking through on the bottom.  Start your nut(s), seat the flange as you tighten the nuts.

 

Header nuts are also nice.  Bellmetric has a bunch.

 

-

Never liked a giant slag of ugly cast iron ruining the engine bay.

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Use a non-shouldered 12mm nut and a flat washer with a piece ground off it so that it seats properly.

 

mike

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'69 Nevada sunroof-Wolfgang-bought new
'73 Sahara sunroof-Ludwig-since '78
'91 Brillantrot 318is sunroof-Georg Friederich 
Fiat Topolini (Benito & Luigi), Renault 4CVs (Anatole, Lucky Pierre, Brigette) & Kermit, the Bugeye Sprite

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Get a longer stud, put a small sleeve over the stud and then put the nut on top. This should give you enough spac to turn the nut.  


Ugly … yes,  functional …. Yea.  
 

Perhaps work a deal with the manufacturer and take it to a shop to get heated , clearanced  and the flange machined flat.

 

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"Goosed" 1975 BMW 2002

 

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Use a smaller nut like the ones on the intake, or cut a short piece of pipe that will sleeve over the stud and put the nut on behind that…

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Don’t let the fear of what could happen

make nothing happen…

 

  

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Grind an edge of a flat washer so it clears the weld, install on the stud. Grind the edge of the header nut to clear, and install over the flat washer.

At that it will look like the other 7. 

 

We all deal with the idiosynchracies of these peculiar little sleds... old bmw engineers must laugh from the grave. 😎

 

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Hacker of many things... master of none.

 

Gunther March 19, 1974. Hoffman Motors march 22 1974 NYC

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Dudeland's got it- 

longer stud and a sleeve.  LOTS of OE turbo manifolds

in the 80's, 90's and beyond were put on this way.

It allowed for more expansion and contraction.

 

I ran 11mm non- flanged copper nuts purchased from a VW shop.  I really liked them-

they didn't back off on their own, never stuck, were easy to get tight, so things didn't leak....

They were also longer than a stock nut, so they were easier to get onto.

 

If that's stainless, I too would worry that it's going to crack

no matter what you do.

 

With a short header, what you do next matters quite a bit, too.

 

t

 

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"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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  • 2 weeks later...
  • Solution
Posted (edited)

Problem Solved

 

Used smaller nuts found online and mentioned in OP and elsewhere on FAQ.  Nuts have smaller hex and smaller shoulder.  Bob's your uncle.

 

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IMG_7897.thumb.jpeg.4a3ab7a754126a48178c427930637426.jpeg

 

 

Edited by 2002#3
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