 Missing Exhaust Bolt, What to do next? |
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| ctc911ctc |
 Feb 23 2020, 09:17 AM
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#1
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Senior Member  Group: Members Posts: 892 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States 
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I finally got the car in the air to investigate an exhaust leak. Thank you for all of the lift advice, the QuickJack seems to be working great!
Looks like i am missing a bolt. Nothing to attach the nut to, so my question is what to do next? Looking at this picture, does this look like a broken part? perhaps there are threads in there? Assistance please.  |
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| ctc911ctc |
Feb 23 2020, 01:38 PM
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#2
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Senior Member Group: Members Posts: 892 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States
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********UPDATE********
Took the manifold off - cannot believe how easy things are with the QuickJack! Seems that the hole has threads - cannot figure out of those are inserts or the original threads??????? Seems that there are 7 good threads, dirty but solid. How deep are these holes supposed to be? Also, how damaged is the valve from running hot? Where do i order the studs?  Long shot of the hole and valve  Angle shot to show threads  Straight shot - does the hole for the stud go into the exhaust gas chamber? Clean out the hole? |
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| porschetub |
Feb 23 2020, 10:54 PM
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#3
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Advanced Member Group: Members Posts: 4,701 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(ctc911ctc @ Feb 24 2020, 08:38 AM)  ********UPDATE******** Took the manifold off - cannot believe how easy things are with the QuickJack! Seems that the hole has threads - cannot figure out of those are inserts or the original threads??????? Seems that there are 7 good threads, dirty but solid. How deep are these holes supposed to be? Also, how damaged is the valve from running hot? Where do i order the studs? Long shot of the hole and valve Angle shot to show threads Straight shot - does the hole for the stud go into the exhaust gas chamber? Clean out the hole? You need to run a 8mm tap into it and see what thread is left,not looking good in that pic,I have used a stepped stud before which is 10mm into the head then 8mm on the other end,there is enough material in the thread boss to hold them. You will need to get this stud made unless you have your own lathe or someone you know has one,or go for a thread insert ,I prefer the stepped stud as it holds on really well due to the larger thread (10x1.5mm) and is a permanant repair. Thread inserts/heli-coils are great but I don't like them used on an exhaust stud repairs. |
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Posts in this topic
ctc911ctc Missing Exhaust Bolt Feb 23 2020, 09:17 AM
76-914 Looks like it twisted off. Remove the header then ... Feb 23 2020, 09:44 AM Mark Henry Looks like you have SSI heat exchangers, the ears ... Feb 23 2020, 10:56 AM brant The lnida job you want to be careful on
You donâ€... Feb 23 2020, 11:06 AM
rjames I was thinking that it looked like maybe someone a... Feb 23 2020, 04:50 PM ClayPerrine :agree:
Been there, done that. You now have a h... Feb 23 2020, 05:15 PM Superhawk996 Which heads and which hole are we looking at? The... Feb 23 2020, 05:16 PM cuddy_k :popcorn: Feb 23 2020, 05:59 PM rjames Come to think of it, when I retapped the exhaust s... Feb 23 2020, 09:04 PM HAM Inc That's just crust where the bottom of the stud... Feb 23 2020, 09:37 PM rjames I had to use a stepped stud when repairing mine. I... Feb 24 2020, 12:38 PM porschetub Yes totally agree about drilling too deep...there ... Feb 24 2020, 03:33 PM
Superhawk996
Yes totally agree about drilling too deep...there... Feb 24 2020, 06:18 PM HAM Inc There's nothing wrong with a properly installe... Feb 24 2020, 08:08 PM brian minson I am curious if anyone has an opinion on the condi... Jul 8 2020, 01:14 PM 914_7T3 Just went throught this with my car. The Studs fo... Jul 8 2020, 01:38 PM aharder When I repaired my 1.8 heads, I went with a M10 x ... Jul 8 2020, 02:29 PM |
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