What is the difference between the 5.3L V8 Found in the 2002+ GMC Yukon / Tahoe and a 5.7L LS1?

From an internal point of view, what would it take to make the 5.3 into a 5.7 or a 6.0?

Crank? Pistons? Bore?

Is the 5.3L a sleeved aluminum block?

 

I believe it's the same block, just less displacement in the stroke. Different cam, heads, and intake too I think.

 

Yeah thats what I think too. I just wanted to verify that its just a 3.62 stroke crank for the 6.0 that makes the difference. I think the 5.3L has a 3.90 bore like the 5.7 but I'm just guessing.

Can the 5.3L be bored to 4.00 without having to siamese cylinder sleeves?

 

- The 5.3 / 5.7 / 6.0 all share the same crank (3.62").
- The 4.8 & 5.3 share the same bore (3.78"). Thus, the 5.3L dimensions are 3.78" x 3.62" . The bore is what seperates all the 5.3 / 5.7 / 6.0 engines.

This info can be found right off of GM's website:

- 4.8L = 3.78" x 3.27"
- 5.3L = 3.78" x 3.62"
- 5.7L = 3.89" x 3.62"
- 6.0L = 4.00" x 3.62"

All 3 engines (excluding 4.8, as I'm not sure about it) use different heads. You'll see some guys run 5.3L heads on their LS1 because they flow the same, but have smaller chambers for increased compression. The 6.0L truck heads are almost identical to the LS6 heads in flow (chamber size) capability, but they have LARGER chambers than those of the LS1 or LS6, thus, lower compression in comparison.

While the LSx (1, 2, 6, 7) series of engines are aluminum blocks with steel sleeves, I don't know about the truck (4.8, 5.3, 6.0) blocks, because they're cast iron, so they may in fact be cast in cylinders instead of sleeved??

Your best "bang for the buck" is to build a 6.0L because they're (obviously) the largest displacement (no replacement for displacement) and they have the best flowing heads (again, even better than LS1!) and they have the strength advantage of being cast iron (although LSx's have the WEIGHT advantage ).

That's as much as I know about them, other than to say pretty much everything is interchangable between all the engines!

 

Thanx dude!

Good info.

Can I use the same rods with just larger pistons for the for the 6.0 conversion?

 

the new 5.3L that comes in the TB is a aluminuim block

 

I'm looking to get 400+hp plus like-stock drivability and fuel economy.

So I'm looking into a 6.0L with Z06 heads and a comparable cam with headers and exhaust.

 

i believe that a 383 is larger than a 6.0.

 

hopefully better than mine. lol

 

been thinking about the 6.0 bore with 4.8 stroke sounds like it could be a fun motor with z06 cam and heads and intake and then .......... boost baby