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Old 07-26-2016, 09:30 PM   #1
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Cross threaded bolt....need advice

So I'm doing a transmission fluid change on a new to me boxster and I come across this cross threaded fastener:



Which is bolt #10 from this parts diagram:




I believe that the threaded hole in the body is toast. What would you recommend I do? I'm thinking that I should re-tap the body hole and move up a size in the fastener. What size/grade/material fastener would you recommend? Or should I do something else?
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Old 07-26-2016, 10:47 PM   #2
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cross thread

Hi, try another similar bolt in the hole to see if it screws in freely.
If not run a tap in to it to clean it out and try again and run a die nut(make sure correct pitch) down the bolt or use a 3 cornered file. If this fails you may have to drill and tap to next size up.
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Old 07-27-2016, 03:42 AM   #3
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I would try a new bolt BUT first I would run a tap through the existing threaded hole Without looking I suspect it is a caged nut within the body You need to be careful it doesn,t break loose and spin in the body so that's why I would want to clean/retap its threads before attempting to replace the bolt.
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Old 07-27-2016, 03:43 AM   #4
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Run a tap up thru there carefully and get a new bolt. Don't try to fix that, you will never get it right. Woody on here breaks plenty of car and surely has a mountain of these in the yard.

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Old 07-27-2016, 04:08 AM   #5
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Lots of lube , tap wrench and use the tap with the pointed end. Go slow back and forth. If you bull it you could break the tap. Then you got a bigger mess.
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Old 07-27-2016, 07:40 AM   #6
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Many thanks to everyone and to Woody who suggested that I can get this bolt at my local hardware store. Its a standard M10 x 1.50 bolt. Chased the threads with a tap and the new one threaded right in.
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Old 07-27-2016, 04:19 PM   #7
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Gotta love a happy ending. Good job!
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Old 07-29-2016, 04:49 AM   #8
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Quote:
Originally Posted by hoyabob2003 View Post
Many thanks to everyone and to Woody who suggested that I can get this bolt at my local hardware store. Its a standard M10 x 1.50 bolt. Chased the threads with a tap and the new one threaded right in.
Did you use a grade 5 or 8? I'd go with grade 5 if it was me. Remind me if you ever buy something from me and I'll throw that bolt in.
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Old 07-29-2016, 12:00 PM   #9
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Thanks, Woody! Now I need to look for something else to buy from you! The hardware store only had a grade 8, so I went with that.
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