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Discussion Starter · #1 ·
Does anyone know what grade bolt & thread size honda uses? I'm going to helicoil and get a new bolt so I can put the mount back on.



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2004 EX AWD
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I don't know the answer, but it seems since you are going to helicoil it, you could do whatever suits you. Honestly, I doubt it is too critical given the two other studs holding it on. I just did my transmission mount, and I seem to recall that bolt was similar to #20 in the pic above. I think the only difference may have been length or one had a shoulder. You could pull #20 to determine the thread size. Good luck.
 

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2007 EX AWD AT (two!); 2008 LX FWD AT
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It is a 12 mm x 35 mm bolt. The only question is whether it is fine or coarse threads. I suggest buying a bolt from Honda or from a salvage yard; then determine the thread pitch to determine the insert you need.
 

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IIRC, M12x1.25
 

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Discussion Starter · #5 ·
Thanks for the response guys. I went around everywhere and could not find any 12mm heilcoil kit in my area so I had to order it from amazon. I also went on ahead and bought a new bolt at a hardware store.
 

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It is a 12 mm x 35 mm bolt. The only question is whether it is fine or coarse threads. I suggest buying a bolt from Honda or from a salvage yard; then determine the thread pitch to determine the insert you need.
i had to replace one of the bolts and went to the hardware store, they told me it was fine threads.
 
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