2002 5.3 vs 2006 5.3
05-25-2017, 07:45 AM
#3
TECH Addict
The 2006 5.3 has better rods but the engines are interchangeable. There is an aluminum 2006 5.3(L33) with higher compression and more hp that is also interchangeable.
05-26-2017, 04:45 AM
#4
1999-2007 Gen3 5.3 engines are all interchangeable. For a stronger more powerful engine, I would stick with the Mid Year 2004 to 2007 5.3 engines or the H.O. L33 5.3 if at all possible.
-Gen3 5.3 Breakdown-
1999 LM7 5.3 Power - 270-HP/315-Tq
2000-2003 5.3 Power - 285-Hp/325-Tq
2004-2007 5.3 Power - 295-Hp/335-Tq (Mid Year 2004, GM Started using the stronger rods)
2005-2007 H.O. L33 5.3 Power - 310-Hp/335-Tq ("Floating" Rods and Flat top pistons used, Aluminum Block, 799/243 heads)
*99-02 will have non-coated piston skirts.
*99-03 used 3 different length head bolts. 04-Up used 2 different lengths, also known as equal length head bolts.
*99-04 will have press-fit wrist pins.
*Mid Year 2004 GM started using the Gen4 "Floating" Rods which were a better, stronger design. Might be safer to look at 2005+ to be sure of the rods.
Like mentioned above, there is an all aluminum L33 5.3 H.O. which makes 310-Hp/335 Lb-Ft of Torque. This engine was only used from 2005-2007 in Extended Cab 4WD's.
Also, watch out for engines with the 706 "Castech" Heads. They often crack and will cause coolant to leak into the cylinders. I don't think I have seen any Castech heads that arn't cracked.
This should be enough information to get you going and decide on what you want to do.
-Gen3 5.3 Breakdown-
1999 LM7 5.3 Power - 270-HP/315-Tq
2000-2003 5.3 Power - 285-Hp/325-Tq
2004-2007 5.3 Power - 295-Hp/335-Tq (Mid Year 2004, GM Started using the stronger rods)
2005-2007 H.O. L33 5.3 Power - 310-Hp/335-Tq ("Floating" Rods and Flat top pistons used, Aluminum Block, 799/243 heads)
*99-02 will have non-coated piston skirts.
*99-03 used 3 different length head bolts. 04-Up used 2 different lengths, also known as equal length head bolts.
*99-04 will have press-fit wrist pins.
*Mid Year 2004 GM started using the Gen4 "Floating" Rods which were a better, stronger design. Might be safer to look at 2005+ to be sure of the rods.
Like mentioned above, there is an all aluminum L33 5.3 H.O. which makes 310-Hp/335 Lb-Ft of Torque. This engine was only used from 2005-2007 in Extended Cab 4WD's.
Also, watch out for engines with the 706 "Castech" Heads. They often crack and will cause coolant to leak into the cylinders. I don't think I have seen any Castech heads that arn't cracked.
This should be enough information to get you going and decide on what you want to do.
Last edited by 07NBSChevy; 05-26-2017 at 05:09 AM.
05-26-2017, 11:29 AM
#5
The biggest issue is to check the reluctor wheel on the crank.
The 02 I know has the 24x wheel, the 06 I believe has the 58x wheel.
What's it going into? If the ecm is 24x then you will either need to swap out the 58x for a 24x or get a convertor. That cost way more then pulling the crank and taking it to an engine machine shop and have them do the swap.
The 02 I know has the 24x wheel, the 06 I believe has the 58x wheel.
What's it going into? If the ecm is 24x then you will either need to swap out the 58x for a 24x or get a convertor. That cost way more then pulling the crank and taking it to an engine machine shop and have them do the swap.
05-26-2017, 12:19 PM
#6
^reluctor wheels are likely to be different. If thats the case this little doohickey can help fix that issue:
http://www.lingenfelter.com/product/L460065397.html
http://www.lingenfelter.com/product/L460065397.html