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

Flexplate Cover Bolt Size

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Old 01-02-2016 | 06:32 PM
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cmaddox03's Avatar
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Flexplate Cover Bolt Size

What size bolts are for the flexplate covers?
Old 01-03-2016 | 10:54 AM
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Re: Flexplate Cover Bolt Size

IDK, the size of the screw is not listed in the parts book.
Old 01-03-2016 | 01:02 PM
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Re: Flexplate Cover Bolt Size

A M6 bolt was too small and 1/4-20 was tight. I'll tap it for 1/4-20 & make that work.
Old 01-03-2016 | 02:20 PM
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Re: Flexplate Cover Bolt Size

Since the book says "screw", I assume it is a course thread screw.
Old 01-03-2016 | 03:35 PM
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Re: Flexplate Cover Bolt Size

^^^^^

it is a course thread "screw"

The actual size I don't know.

Could just get a pack of # 6 & #8 ones at hardware store and see which one fits closest. They may "self tap" if slightly larger than OEM as the bellhousing is aluminum
Old 01-04-2016 | 08:29 AM
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Re: Flexplate Cover Bolt Size

Thanks for the help.

I ran a 1/4-20 tap thru them & worked good.
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