LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Water neck bolts stripped threads... what size tap?

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Old Mar 19, 2005 | 06:19 PM
  #1  
96WhiteZ28's Avatar
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Water neck bolts stripped threads... what size tap?

I stripped the threads with the bolts in a new waterpump i bought.. You get what you paid for... should have stuck with GM... now what size would I be able to tap the threads a little to put new bolts in? I don't have a tap set I'll go buy one and i don't want to buy one i can't use... the hardware store by my house has lots of bolts hopefully one will fit...
Old Mar 19, 2005 | 06:54 PM
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Re: Water neck bolts stripped threads... what size tap?

The stock bolt size and thread is M6 x 1.
Old Mar 19, 2005 | 06:54 PM
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Re: Water neck bolts stripped threads... what size tap?

Most autoparts stores have a bunch of nuts and bolts on a cable to compare threads with. Just carry one of your good bolts with you up to autozone, etc. and you won't have to wait till monday. If you can get a drill to it, put in a heli-coil and you'll never have to worry about it again.
Old Mar 19, 2005 | 06:56 PM
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Re: Water neck bolts stripped threads... what size tap?

what's a helicoil
Old Mar 19, 2005 | 06:57 PM
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Re: Water neck bolts stripped threads... what size tap?

you drill the hole out to a larger size, tap it and put in a threaded steel insert that locks in the hole.
Old Mar 19, 2005 | 06:59 PM
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Re: Water neck bolts stripped threads... what size tap?

Sweet... i googled it... think this is available locally??? I checked sears.com and they don't have it... Autopart stores or hardware stores?? Home depot?
Old Mar 19, 2005 | 07:07 PM
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Re: Water neck bolts stripped threads... what size tap?

A decently stocked parts store should have them.
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