ilirw325

iTrader: (3)

M11 x 2.0 is the head bolt thread spec.
Looks like the only actual chaser i could find is made by ARP and costs $50.

Wanted to just buy a tap/chaser and do it 100% the right way, but i dont feel like paying $50 for somethin i may only use once.

As far as cutting an old head bolt, i would imagine you have to clean up the edges of the threads after they get milled with a small hand file so a jagged edge dosent destroy the tapped hole in the block. is this correct?


Thanks

Lithium

iTrader: (47)

Just got to cut up an old head bolt...works perfect.

www.ls1howto.com has a pic of it if you need to see one...

Beast96Z

iTrader: (21)

I personally would only use the ARP one because it is specifically designed for the LS1 hole. The threads of the block are "rolled". If you use a normal tap, you will cut the roll off of the threads causing them to become weak and not be able to provide the proper holding force. The bolt will only "semi" clean the holes. They won't remove all the debris. Buy the ARP and then sell it when your through.

ilirw325

iTrader: (3)

Is the ARP one long enough or does it need an extension, cause regular taps are fairly short

Beast96Z

iTrader: (21)

I could only assume, that since it is LS1 specific, that it would be long enough.

cantdrv65

iTrader: (3)

I personally wouldnt do heads without ARP studs, but thats just me.