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Old Nov 25, 2009 | 06:07 PM
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Default 6.0 iron block

I am wanting to put a 6.0 iron block into my LS1 6 speed Bird. What is needed to make this work? I have a bare block. Thanks.
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Old Nov 26, 2009 | 11:19 AM
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Well, other than the other parts needed to make up a complete engine, you'll need to drill and tap a hole on the driver side of the block. I think it's for the power steering.

I think on older blocks, the cam sensor is at the rear of the block while newer blocks have it on the front cover. You may need a conversion kit if the block is newer.

Also, head bolt holes are different on newer blocks, as well as cam bearings.
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Old Nov 26, 2009 | 11:28 AM
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The Head Bolt holes are the same (placement) but they do use a different head bolt kit. they dont have the 2 shorter bolts like the early blocks do.
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Old Nov 26, 2009 | 12:58 PM
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Originally Posted by bigboykilroy
The Head Bolt holes are the same (placement) but they do use a different head bolt kit. they dont have the 2 shorter bolts like the early blocks do.
That is not correct, there are two different designs for the head bolts. It depends on the year on the 6.0L.

Go to SDparts.com, they list both versions and the model years will be listed as well.
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Old Nov 26, 2009 | 06:52 PM
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Will it bolt to the ls t56 and I hear that there is a difference in cranks?
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Old Nov 26, 2009 | 07:01 PM
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ur t-56 should bolt up no problem .. as far as ur asscerories everything should work. manifolds etc etc basically ls block and the lq series blocks are the same just ones iron the other alum and the lq is like the child of the ls1 series
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Old Nov 26, 2009 | 07:08 PM
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I've heard that sometimes there is no bolt holes for the alternator...not a big deal anyway.
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Old Nov 26, 2009 | 07:42 PM
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Originally Posted by 69LT1Bird
That is not correct, there are two different designs for the head bolts. It depends on the year on the 6.0L.

Go to SDparts.com, they list both versions and the model years will be listed as well.
I was saying the head bolt pattern is the same on the 6.0 block.. since its a bare block and he will prob be using his old heads. Yes 6.0 does take the newer design head bolts.
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Old Nov 26, 2009 | 07:58 PM
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No, the iron 6.0L, depending on the year, has two different head bolt designs.
1997 - 2003 has one design and 2004 up uses a different one.

http://sdparts.com/catalog/ls-gen-ii...ance/fasteners
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Old Nov 26, 2009 | 11:11 PM
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wow, there is lots of sketchy information in this thread.

You had better run a search! lol
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Old Nov 26, 2009 | 11:19 PM
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The crank issue you were thinking about is the 99 and some 2000 LQ4s that have the iron heads. They have a longer crank and were mated to 4L80es. They can not be run with a 4L60e. Not sure about a T56, but I imagine you would have the same problem. Just stay away from the long crank block and you will be safe. Course if you just have a bare block this won't matter to you.
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Old Nov 26, 2009 | 11:47 PM
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So you're sayin the shorter crank will fit in the long crank block?
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Old Nov 27, 2009 | 11:09 AM
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Originally Posted by 99LS6SS
So you're sayin the shorter crank will fit in the long crank block?
Yes, most people use a 5.3L crank. It is the same as the short version 6.0L.
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Old Nov 27, 2009 | 03:12 PM
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correct if im not mistaken they had the long crank till 02 ...
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Old Nov 27, 2009 | 06:34 PM
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As stated earlier. 99 and 00 blocks have longer cranks made to mate up to 4l80e trans. You can use any year block as long as you are not going to use the crank since that is what is different. You do need to know what year the block is so you can get the right head bolts. 2004 is the change over year where they all became the same length. I did a 2002 LQ4 and they had different lengths.
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Old Nov 28, 2009 | 02:17 AM
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Originally Posted by nightmare23
correct if im not mistaken they had the long crank till 02 ...
No, it is 99-early 2000. I have a 2001 LQ4 that came with a 4L60e from the factory, so no long crank there. Also have a parts 2000 2500 LQ4/4L80e that has the short crank and alloy heads.
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Old Nov 28, 2009 | 09:41 AM
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You are not understanding me, Im talking about HEAD BOLT PATTERN, Not what bolts to use.

ALL of the LS based engines have the same HEAD BOLT PATTERN !
Do you not understand what a head bolt pattern is? The placement of the head bolt holes in the Engine blocks deck.
I'm not talking about what bolts to use.

Yes your link is correct on what BOLTS to use for what year engine you have.

Originally Posted by 69LT1Bird
No, the iron 6.0L, depending on the year, has two different head bolt designs.
1997 - 2003 has one design and 2004 up uses a different one.

http://sdparts.com/catalog/ls-gen-ii...ance/fasteners

Last edited by bigboykilroy; Nov 28, 2009 at 09:46 AM.
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Old Nov 28, 2009 | 03:44 PM
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Yes, I do know what bolt pattern is, thanks for explaining anyways.

Your quote?
Originally Posted by bigboykilroy
The Head Bolt holes are the same (placement) but they do use a different head bolt kit. they dont have the 2 shorter bolts like the early blocks do.
This is not clear and is wrong, what is an earlier block, just trying to get the guy the right information.

I was saying the head bolt pattern is the same on the 6.0 block.. since its a bare block and he will prob be using his old heads. Yes 6.0 does take the newer design head bolts.
This is why I put in the link since you seem to think that the 6.0 uses the Newer bolt design when they use both designs, depending on the year.
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Old Nov 29, 2009 | 03:00 PM
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hmmmmmm
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