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Thread: Busted Flapper Box Mounting Stud

  1. 02-28-2023, 03:32 AM #1
    Chickenstrips
    Chickenstrips is offline
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    Busted Flapper Box Mounting Stud

    My engine rebuild is pretty much done but redid the flapper boxes while the engine was out. I managed to break one of the three mounting studs on each side with 4.5 and 7.5 mm left to work with. Not going to win any concours awards but decided to turn a couple sleeves and tap 6mm threads, then made a spacer that slides over so bolt would press it down and hold flapper box. I know you can get by with only 2 of 3, but for all the effort restoring the boxes I wanted all 3. Sharing in case someone else runs into this. I thought I heard of some other solution, but didn’t find it. Name: 203E9B67-2FD2-4EAE-AD77-FD1F6BBC5F4B.jpg Views: 162 Size: 79.1 KBName: 3382F935-687C-4BD8-98DC-A6643D93536F.jpg Views: 156 Size: 95.5 KB
    Member #3896
    1973.5 911 T
    1974 911
    1967 912
    1974 CB750K
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  2. 02-28-2023, 05:06 AM #2
    Rick Cabell
    Rick Cabell is offline
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    Breaking some of those studs is very common. Lucky you had a lathe to do the job.
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