 Copper nuts, exhaust leaks! |
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| mgphoto |
 Sep 16 2010, 09:06 PM
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"If there is a mistake it will find me"  Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California  |
Hello,
I am having a problem with exhaust leaks, I am, for the first time using copper nuts as opposed to the steel with insert and flange Porsche part # 039.256.297 see photo below.  I would still be using these if I hadn't lost one, and Porsche says these are NLA. The procedure I would use, after replacing the copper seals, I would use Never Seez on the studs and torque the steel nuts to 16 ft-lbs. I am not sure if I should use Never Seez with the copper nuts and I am not sure the torque is correct for these fasteners, as they are oval shaped and seem tighter to start with? Any experience with this would be very helpful. Thanks, Mike |
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| SGB |
Sep 16 2010, 10:35 PM
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Copper is used so it can be cold chiseled off if they are stripped or siezed- or so I was told by my favorite VW shop. They are pretty much SOP for exhaust nuts. I would only torque to 9 or 10 ft lbs- thats enough if all is clean and aligned. Studs pull out like baby teeth after all these years of heat cycling. I really F'd a head after I took my exhaust off too many time getting all obsessed with a little noise.
Make sure you get the old copper sealing rings out of the head. They get stuck in there. I use a little Aluminum duct tape around the sides of the exhaust pipes to hold the copper rings in place for reassembly. |
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Posts in this topic
mgphoto Copper nuts Sep 16 2010, 09:06 PM
brer I believe the Porsche nuts are copper plated, not ... Sep 16 2010, 09:32 PM
Drums66
I believe the Porsche nuts are copper plated, not... Sep 17 2010, 11:11 AM mgphoto
Copper is used so it can be cold chiseled off if ... Sep 17 2010, 12:37 AM avidfanjpl Hey I used gasket cement, but superglue is good to... Sep 17 2010, 01:22 AM Van Copper coated. You can get them from NAPA for abo... Sep 17 2010, 05:25 AM realred914 i'd still go with the specified torque as poin... Sep 17 2010, 10:49 AM mgphoto
i'd still go with the specified torque as poi... Sep 17 2010, 01:02 PM Cap'n Krusty I agree with Dave (realred). It would be well for... Sep 17 2010, 02:17 PM mgphoto
I agree with Dave (realred). It would be well fo... Sep 17 2010, 04:59 PM Cap'n Krusty
I agree with Dave (realred). It would be well f... Sep 18 2010, 07:58 AM mgphoto
[quote name='mgphoto' post='1372291' date='Sep 17... Sep 18 2010, 09:41 AM mgphoto
[quote name='mgphoto' post='1372291' date='Sep 1... Sep 18 2010, 12:30 PM mgphoto
[quote name='mgphoto' post='1372503' date='Sep 18... Sep 18 2010, 04:40 PM brer
[quote name='mgphoto' post='1372503' date='Sep 1... Sep 18 2010, 06:58 PM Cap'n Krusty
[quote name='mgphoto' post='1372291' date='Sep 1... Sep 18 2010, 07:40 PM charliew Nickel antisieze is for high temperature. Solid br... Sep 17 2010, 05:08 PM Krieger Didn't someone reccomend heating the copper ga... Sep 17 2010, 07:58 PM dangrouche yes by all means, flame the new copper gaskets til... Sep 17 2010, 08:42 PM solex I had it with the copper plated nuts, and pulling ... Sep 18 2010, 11:14 AM mgphoto I got it to work by using a 10mm x 1.25 helicoil a... Sep 20 2010, 10:39 AM |
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