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I'm putting my LS1 back together right now and my block did not have the holes for the damper. I found someone making this style again online so I will be installing that this weekend. My question for those who have drilled and tapped their blocks is did you drill the block completely or should these be blind holes? I've read every post I could find on this but no one ever stated whether they were through holes or not.
They are through holes. The metal is only around ½ to ¾" thick right there, or at least, that's what it was in mine (LQ9). Aluminum blocks might be a bit different but I doubt it.
ICT makes a drill fixture that drills for the LS2 damper.
I just did my LS1 block.
$39 from Amazon. Comes with tap and drill bit.
LS2 damper is like $15
Worked perfect. Alum block are also drilled all the way through.
Probably a push on price vs the LS1 damper.
But it’s another option.
ICT makes a drill fixture that drills for the LS2 damper.
I just did my LS1 block.
$39 from Amazon. Comes with tap and drill bit.
LS2 damper is like $15
Worked perfect. Alum block are also drilled all the way through.
Probably a push on price vs the LS1 damper.
But it’s another option.
That's interesting, guess I should have posted here earlier. I actually bought the LS2 thinking I would make it work and then returned it because I just didn't like where the hole location would wind up. I would have been a little more confident with the fixture but I found the LS1 style for $40 so I went with it.
Mine came out looking just about exactly like Ron's. Except that his isn't tapped yet. I just put the LS2 piece (wasn't a stock one but I forget where I got it) where it needed to be, marked the holes with a punch, and went to town with a hand drill. Piece o cake and works beautifully. That kit does look kinda slick though, definitely reduces the chances for error.
Mine came out looking just about exactly like Ron's. Except that his isn't tapped yet. I just put the LS2 piece (wasn't a stock one but I forget where I got it) where it needed to be, marked the holes with a punch, and went to town with a hand drill. Piece o cake and works beautifully. That kit does look kinda slick though, definitely reduces the chances for error.
That's what I had planned til I saw the spacing. Was still thinking about doing it til I stumbled on the one that would sit right with the bosses for $40. The tool would definitely take the guess work out.
Didn't turn out too bad, could have moved a little more to passenger side but it's pretty tough to get perfect. If I had to do it again I'd rather do it with a bare block and the fixture.
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LS1 timing chain damper 
Except that his isn't tapped yet. I just put the LS2 piece (wasn't a stock one but I forget where I got it) where it needed to be, marked the holes with a punch, and went to town with a hand drill. Piece o cake and works beautifully. That kit does look kinda slick though, definitely reduces the chances for error. 
