5.3 to LQ9

[rumblebox]

will i run into any trouble pulling out my 99 5.3 and dropping in an 03+ LQ9? any different brackets, plugs, bolt holes missing? etc etc


thanks,
carlton

[RedHeartbeat]

It should be a simple swap, bolt for bolt. The only issues are the early 6.0Ls had a thicker crankshaft flange therefore a different flywheel. I think that was 99-2000 only.

[8ty8 LS1]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; May 3 2006, 12&#58;06 PM) [snapback]51981[/snapback]</div>

It should be a simple swap, bolt for bolt. The only issues are the early 6.0Ls had a thicker crankshaft flange therefore a different flywheel. I think that was 99-2000 only.
[/b]

is that true? i hope so, because i have an 01 lq9 goin into my truck this summer...

[rumblebox]

i thoguht 03 was the first year for the LQ9....... are you talking about the LQ4?

[RedHeartbeat]

Won&#39;t be any issues if it is 03 or newer, then. Go for it&#33;

[8ty8 LS1]

<div class='quotetop'>QUOTE(RedHeartbeat &#064; May 3 2006, 07&#58;51 PM) [snapback]52036[/snapback]</div>

Won&#39;t be any issues if it is 03 or newer, then. Go for it&#33;
[/b]

so the 01 will need a different flywheel?

[RedHeartbeat]

6.0L Cranks
The 6.0L shares the same 3.622? (92mm) stroke with the 5.3L and 5.7L, but there are two or three different cranks.


All of the &#39;99 - &#39;00 cranks had the 12552215 casting with the wide flange. This is the only application for a crank that has a 92mm stroke and a wide flange.

All of the &#39;01-&#39;04 cranks used the 12552216 casting with the narrow flange, just like the 5.3L and 5.7L, but the 6.0L pistons weighed considerably more (470 grams) than the ones used in the 5.3L and 5.7L engines, so the bobweights had to be different. These may even be two different versions of this crank because the rods used in the LQ9 motors weighed 36 grams more than the ones in the LQ4 motors.

taken from http://www.babcox.com/editorial/ar/eb040538.htm