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> HeliCoil Seat Belt Mounts, bad idea?
McMark
post Oct 21 2005, 11:43 AM
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I have seat belt mounts that have stripped threads. I'm wonding if HeliCoil's are strong enough in case of an accident. Logic tells me, yes they would be fine if installed correctly, but my gut is a little more nervous than my head. Can anyone tip the scales one way or the other for me?
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ArtechnikA
post Oct 23 2005, 10:28 AM
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QUOTE (Cap'n Krusty @ Oct 23 2005, 12:10 PM)
...As for Rich's claim the bosses aren't there, I don't recall seeing any Porsche since the 356C that didn't have them under the carpet somewhere. My 65 911 even has the shoulder belt anchors...

donno about coupes, but in (at least) '70 and '71 Targas, the seat belt mounts were attached tp the seat sliders (outboard) and the center tunnel top (inboard) both using 2 6mm bolts in tension. i do not consider it a very good design. it does have the usual 7/16-UNF receptacle at the top of the B-pillar for the shoulder belt mount.

looks just like this, from drawing 812-00 in the ETKA ('71, Main Group 8, SubGroup 12 (belts))


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McMark   HeliCoil Seat Belt Mounts   Oct 21 2005, 11:43 AM
ArtechnikA   i have been down this path too, since there are *n...   Oct 21 2005, 11:47 AM
Aaron Cox   id be scared. weld up and retap? <...   Oct 21 2005, 12:58 PM
jhadler   Yes, it's a welded in insert. But look at the ...   Oct 21 2005, 01:03 PM
goose2   drill them larger and re tap for a bigger bolt?   Oct 21 2005, 02:37 PM
dlo914   speaking of seat belts...has anyone tried installi...   Oct 21 2005, 03:03 PM
McMark   Early cars have the supports and threads in place ...   Oct 21 2005, 06:33 PM
banksyinoz     Oct 21 2005, 07:43 PM
trekkor     Oct 21 2005, 08:41 PM
nebreitling   boy, that's going to be a tough fix. even ove...   Oct 21 2005, 09:17 PM
McMark   I'll have to agree with Rich's point that ...   Oct 21 2005, 09:19 PM
JOHNMAN   As I recall, the seat belt bolts have an unusual (...   Oct 22 2005, 12:13 AM
McMark   Yeah, it's 12 mm x 1.25. Most 12 mm bolts are...   Oct 22 2005, 12:25 AM
neo914-6   The band-aids aren't worth the liability. Did...   Oct 22 2005, 12:28 AM
McMark   It looks like the threads were torn out during dis...   Oct 22 2005, 12:37 AM
banksyinoz     Oct 22 2005, 11:27 PM
JOHNMAN   If you feel comfortable doing it, go with the heli...   Oct 22 2005, 11:46 PM
ArtechnikA     Oct 23 2005, 06:19 AM
JOHNMAN  
  Oct 23 2005, 09:41 AM
Cap'n Krusty     Oct 23 2005, 10:10 AM
ArtechnikA   my spark plug threads are 14mm - i donno about you...   Oct 23 2005, 10:15 AM
ArtechnikA   ...   Oct 23 2005, 01:00 PM

 

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