bolt sizes

[JeepSJ]

Does anyone know the thread size of the bolt holes in the block for the bellhousing? This would be for a 1997 block.

Thanks

[Uncle Wally]

I'll take a peek when I go down to the barn tonight. Mine is apart at the moment - so I should be able to get ya the info.

Waldo

[Uncle Wally]

3/8 x 16 (coarse) 1 5/16 long

[JeepSJ]

Thanks.

[Quack_Addict]

Yep... 3/8x16. Don't try to use M10x1.5 - while the fasteners are nearly identical in diameter and the thread pitch nearly the same, M10's in a 3/8 hole (or vise versa) will have you in a world of hurt. Bell housing fasteners (3/8") should have either 3 (Grade 5) or 6 (Grade 8)tick marks as a headstamp... the metric variety have numbers like 9.8, 10.9, etc as a headstamp.

[Uncle Wally]

all but one or two of them have the provision to bolt something to the head side. Ie - a nut screws onto the bolt after the bolt is installed and torqued

Waldo