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 Post subject: Stripped boot hinge
PostPosted: Sat Jul 03, 2010 5:50 pm 
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1360cc
1360cc
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Joined: Mon Aug 23, 2004 10:07 pm
Posts: 10653
Location: SE Melbourne
I've stripped a thread on the boot hinge closest to the end (the shallow one).
Can anyone tell me the the easiest fix whilts its still on the car?

Next thread size up by looking at tapping charts is M8, that sould like a viable fix?
:D

Thanks.


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 Post subject:
PostPosted: Sat Jul 03, 2010 6:31 pm 
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Yay For Hay!
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Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border
yeah, I did that with one of mine - went up to 5/16 NF

one day I'll put helicoils in them...


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PostPosted: Sat Jul 03, 2010 6:51 pm 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39757
Location: near Baulkham Hills, NSW
Not really enough metal there (thread length) to support helicoils so I made some stepped (`bull headed') studs. Also, 1/4 UNF thread should never have been used in alloy, it is a shallow thread and strips too easy. UNC is much better for this as it's deeper.
I bought 5/16" UNC x 3/4" Grade 5 setscrews, and turned most of the length down to 1/4", and threaded it 1/4 UNF.
Then I drilled & tapped the hinges 5/16" UNC.
Be careful doing this, remember the thread axis is at an angle to the hinge face.
I screwed the studs in with Loctite 262 super studlock.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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