Header flange bolt holes?
Thread Starter
Launching!
Joined: Feb 2010
Posts: 233
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Header flange bolt holes? So i bought some ebay headers and everything was going fine until i had to bolt them in. I could only bolt up 4 of the bolts and the last two would not bolt in. I want to elongate the header flange bolt holes. I was wondering what would be the best way to do this and with what tool would you all recommend me getting. Thanks
Teching In
Joined: Nov 2013
Posts: 34
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From: N. Berwick, Maine
Trying to bolt them up to the heads? If so some of the holes you have to insert the bold before putting the header up there and work it in as you screw the bolts in. then once its cloce drop the gasket down behind. Had to do this with the pace setter headers.
Thread Starter
Launching!
Joined: Feb 2010
Posts: 233
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yeah it happens when im bolting them up. I even took them off and put the gasket on them and the two middle flange holes were not aligning with the gasket. i know they are misaligned because i put the gasket on my old pacesetters and and all of the holes lined up.
Thread Starter
Launching!
Joined: Feb 2010
Posts: 233
Likes: 1
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TECH Addict
Joined: Jun 2009
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From: Tulsa, OK
Certainly can. There's nothing at all magic about SS, at least not as far as a file is concerned. There's no such thing as a special file for SS. You just need a rat tail file that will fit in the hole. Make sure you put a handle on the file, it'll save your hand a lot of grief.
Yeah if you need to open up the bolt holes I am now wondering how true the flange is. Fel-Pro 1406 gaskets all the way. Do not use a steel gasket or you may find yourself with massive leaks.
OP, BEFORE you start grinding/cutting, explain where the mis-alignment is. I've seen some LT-1 "shorties" that have individual flanges that don't quite align "up and down" with the intended bolt holes. In that case, you need to get a couple of the bolts started, then use a brass drift, placed through the header flange, and into the bolt hole, and "coax" the flange in place, while placing a bolt in the adjacent hole.