 What's up with these exhaust studs?, on my 6.. |
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| DougC |
 Jul 22 2005, 08:14 AM
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Senior Member  Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307  |
I noticed last night that when I mount my headers in place the exhaust studs are too long...well they have a skinny unthreaded area in the middle and the nut would bottom out before touching the header flanges. If all nuts were tight the header would still not fit tightly to the block. Here's a pic..
Doug C Attached image(s) 
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| ArtechnikA |
Jul 22 2005, 01:47 PM
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
the PET wouldn't help you, i'm afraid because of how metric threaded studs are specified. i found this How Metric Studs Are Specified PDF from Maryland Metric interesting and helpful.
PET properly calls that stud 22mm (25 in the case of 911T, for no reason they explain...) but as shown on the "How Studs Work" document, the unthreaded area is NOT included in the stud spec ! the drawing in the doc shows how to calculate the length of the unthreaded area, and thus the overall length of the stud... in this case it seems to be 10mm; when this topic came up on the 911 list, the consensus was that the proper studs for an early exhaust car should be 32-35mm measured OAL, as you mentioned. |
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Posts in this topic
DougC What's up with these exhaust studs? Jul 22 2005, 08:14 AM
DougC another... Jul 22 2005, 08:14 AM TimT You get to install new exhaust studs!! the... Jul 22 2005, 08:18 AM DougC Tim, it really looks like they were machined this ... Jul 22 2005, 08:26 AM ! The 3.0s had a thick/thin flange difference.....bu... Jul 22 2005, 08:33 AM DougC Yes, I will be replacing ...but again, with what??... Jul 22 2005, 08:46 AM DonTraver Easy to figure out. Measure the depth of the stud... Jul 22 2005, 08:57 AM Porsche Rescue Use the ones you have to come up with a length. Th... Jul 22 2005, 08:57 AM ClayPerrine Doug,
The thermal reactors used on the 2.7 requir... Jul 22 2005, 11:52 AM ClayPerrine Oh.. and the easiest way to remove the studs is to... Jul 22 2005, 11:52 AM Cap'n Krusty Yet another case of wild speculation coupled with ... Jul 22 2005, 12:58 PM
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