Convertible Top-Screw hole stripped - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 6 (permalink) Old 06-21-2006, 10:24 AM Thread Starter
 
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Convertible Top-Screw hole stripped

I have a 1988 Veloce. On the passenger side windshield frame, the "clamp anchor" that clamps the top down has a stripped screw hole as the screw keeps falling out. Can I just re-tap to a larger size ? Any remedies ?

Thanks - Terry
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post #2 of 6 (permalink) Old 06-21-2006, 10:55 AM
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If the glass were out...I would say weld it...redrill it...tap it. But with glass in...I am going to say either tap it larger for a new larger screw...OR if you want to use the current screw..put in a helicoil. Still will have to drill and tap for the helicoil.

Best Regards,
John M

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1978 AR Spider Veloce 2000....the first and still here...Bianco
1984 AR Spider Veloce............the second & gone to the parts bin....Rosso
1992 AR Spider Veloce............the third and still here...Bianco
1991 AR 164L........................the fourth and traded on the SS....Rosso
1965 AR Sprint Speciale..........the fifth...in boxes....sold....Bianco
1978 AR Spider Veloce 2000....the sixth gone to be a parts car...slow black
1967 AR Giulia Sprint GT.........the seventh with Gregg and sold......Rosso
1993 AR Spider Veloce............the eighth with Gregg and still here....Verde Inglese
1982 Ferrari 308 GTSi.............the first and still here....Azzurro
1999 Ferrari 355F1 Spider........the second and still here....TdF Blue[/SIZE]
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post #3 of 6 (permalink) Old 06-21-2006, 12:58 PM
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Are the hole threads badly damaged or mainly the machine screw? You might try a new machine screw. If that's no good maybe try a coarse threaded screw (or self-tapping screw) to see if you get a bite in the metal. Those are both non-elegant fixes. The proper elegant fix is to helicoil it. I don't think drilling and tapping for a larger screw is practical since the bracket's is made for the smaller screw diameter and screw head.

John Stewart
74 Spider
91 164S
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post #4 of 6 (permalink) Old 06-21-2006, 01:06 PM
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You might also consider using a rivnut for this repair. There should be enough room for one in the windshield frame. They really work well in thin metal applications. I wouldn't think there is enough metal for a helicoil to get a good bite into. Just another thought for your consideration.

Best Regards,
Paul

'73 Spider
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post #5 of 6 (permalink) Old 06-21-2006, 04:20 PM Thread Starter
 
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Thanks for the ideas. I will ponder them. Excuse my ignorance but what is a helicoil ? That sounds like a good fix but not sure ehat it is. Also the idea about the rivet. That could always be drilled out if necessary to remove.

Terry
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post #6 of 6 (permalink) Old 06-21-2006, 04:46 PM
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Here is some info on Helicoil:

http://www.emhart.com/products/helicoil.asp

http://www.roadstarmagazine.com/modu...rticle&sid=233

Helicoils work very well.

Rivnuts are also very effective. It's not a rivet, it's a rivnut. It's like a rivet, only much larger diameter with a threaded hole in the middle. Here is more info:

http://www.bollhoff.com/web/usa/en/w.../index_us.html

Bill / 1977 Alfa Romeo 4C2000 / 2012 BMW S1000RR / 1975 BMW R90/6
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