Copper nuts, exhaust leaks! |
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Copper nuts, exhaust leaks! |
mgphoto |
Sep 16 2010, 09:06 PM
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#1
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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 |
avidfanjpl |
Sep 17 2010, 01:22 AM
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#2
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914 Hemophiliac Group: Members Posts: 720 Joined: 6-April 10 From: Bear, Delaware Member No.: 11,566 Region Association: MidAtlantic Region |
Hey I used gasket cement, but superglue is good too, and the nuts from PP and AA are fine. They are copper coated, 12mm, and work every time. They are all copper plated. I broke off some and they were OEM and not fully copper. Too soft.
Copper does do well with copper paste antiseize compound on the threads and I do torque to 11 lbs. Buy a whole set from PP or AA, add all new copper gaskets and exhaust manifold gaskets, and nuts/bolts for them too 13mm X 12mm. I even replaced the studs into the head with 8mm X 8mm from AA. Worth every penny to do it all, and spend the time so you DON'T burn a valve. I did once, and it was a huge bill to fix, even by myself in 1980. John |
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