How Much Work

[wondernutz]

does anyone know how much work it is to swap a stock 2002 z71 5.3 to a 5.7 or ls1

[MI 99XPL]

I don't know the amount of time, but the Gen3 5.3L and the Gen3 5.7L use the same long block. So you might want to lean in that direction instead of the older Gen2 5.7L found in the 1998 and earlier vehicles. Also, the Gen4 engines are very close, but have some small differences that will make it more difficult than a Gen3 to Gen3 swap. You will need to program you PCM with the swap. You might get luck and have the existing one start the new Gen3 engine, but you be better off getting it programed. I've heard good things about Black Bear Performance and Nelson. And without looking at thier sites, I think both of them offer free upgrades if you ever need it.

 

Pick up these books, they'll give you a lot of info on the Gen3 engines and what the differences are....

 

1) How to Build High-Performance Chevy LS1/LS6 V-8s.

2) Chevy LS1/LS6 Performance: High Performance Modifications for Street and Racing.

 

They are both paperbacks, so about $13 -$15 bucks each. You can get them at Amazon.com or your local book store. LOTS of good info. You might even decide to keep the 5.3L and mod it after reading them (assuming your 5.3L is in good shape....). I bought both, the 1st one probably has better info for swaping, the 2nd is probably better for modifying.

[johns454]

does anyone know how much work it is to swap a stock 2002 z71 5.3 to a 5.7 or ls1

 

 

I have one getting this swap done right now. The mechanic called me tonight and it looks like the biggest thing was the water pump is a little different from the car to the truck engine. We are putting in a 2002 crate engine into my 01 Sierra I am leaving the truck intake on and all of the truck accessories. As soon as it gets done its off to Fast Chips for a Dyno Tune. I am looking forward to getting it done as I hope its a fun sleeper.

[Schmids5.3l]

The LS1 should be a direct swap, the only issues I can think of might be the fuel set up, IE if you have a return style fuel system stock on the truck. Besides that its the same motor with a bigger bore, different intake manifold, heads, and accessories.

[svensk]

The LS1 should be a direct swap, the only issues I can think of might be the fuel set up, IE if you have a return style fuel system stock on the truck. Besides that its the same motor with a bigger bore, different intake manifold, heads, and accessories.

He could re-use his truck intake manifold with an LS1 then he could keep his accessories.

[Schmids5.3l]

The LS1 should be a direct swap, the only issues I can think of might be the fuel set up, IE if you have a return style fuel system stock on the truck. Besides that its the same motor with a bigger bore, different intake manifold, heads, and accessories.

He could re-use his truck intake manifold with an LS1 then he could keep his accessories.

 

 

 

 

 

 

 

 

 

True, I'd strip the LS1 down to the long block and swap the truck intake (its better anyways), fuel rails/injectors, and all the accessories if they don't come with the LS1. Then it would literally be plug and play swap if he has a return fuel set up. I lost ALL my tech when I cleaned my computer from the crap I got this summer, so I feel like a noob