Engine Swap from 5.3 to 6.2

[BigM]

Hey All, anyone did the swap?
I have a 2013 (Z71) with 200k on the meter and looking to swap to new 6.2 engine, any feedback, recommendations, advise...etc
and is it a plug and play or require many side jobs?

TIA

 

[Geotrash]

6.2 swap thread

Hey all, doing a 6.2 swap in my 2012 5.3. Picked up a 50k mile L94. Build plan Eliminate DOD. Ordered myself a custom Cam Motion 215/225 .600 .600 115+7 VVT cam Adding .040 Cometic Gaskets Likely will mill another .020 off the heads. Already have 1 7/8" headers Parts List Valvetrain Comp...

www.tahoeyukonforum.com

Enjoy

 

[ls1frc]

It's a direct bolt in including wiring. Just don't buy Johnson lifters. Or if you do, measure your lifter bores. Delete DOD while you're there and put in Morel dropin replacement lifters or LS7 lifters.

Other than my annoying lifter tap, my swap went really well. I just grenaded my diff from all the extra power. Enjoy!

It's a night and day difference vs the 5.3. I was going from a bolton + cammed + heads 5.3 and it was nearly 2 seconds faster to 60 after the 6.2. You can't compare the torque between the two.

5.3 needs FI to compete.

 

[swathdiver]

Hey All, anyone did the swap?
I have a 2013 (Z71) with 200k on the meter and looking to swap to new 6.2 engine, any feedback, recommendations, advise...etc
and is it a plug and play or require many side jobs?

TIA

Well, you will soon need to overhaul the transmission and upgrade the differential carrier or put a 9.5" semi-floater in place of the old 8.6". Lots of fun, the 6.2 Sierra is a rocket and when the time is right, the Yukon will get an L9H too. 3.73 gears a must!

 

[BigM]

Thanks All for the feedback, so which 6.2 engine is best, 6.2L V8 L86 or L96?

 

[swathdiver]

Thanks All for the feedback, so which 6.2 engine is best, 6.2L V8 L86 or L96?

The L96 is an iron block six liter. The L86 is a Gen V LT motor, not compatible with yours. Get an L9H or an L94 and delete AFM (converting it to an L9H).

 

[PatDTN]

I did the swap and a couple things I learned. Change your starter. I left my 5.3 starter and now I need to put the stronger 6.2 starter in. I bought the AFM Delete parts from Texas Speed. Nice guys gave me a deal on the LS9 cam. Not good for towing! Go with an RV cam if you're going to tow or haul anything. On the other hand if you want crazy sudden power let me know and maybe we can trade cams and you get my LS9 cam and I get the RV cam. Seriously. I think my 5.3 was better for towing. I'm sure that's all up to the cam.

 

[PatDTN]

Oh yeah, if you're going with a used 6.2 change the oil pressure sender and tiny screen under it before you drop it in.

The 6.2 has a bigger exhaust pipe but the 5.3 system bolts right up. It should be just fine.

 

[swathdiver]

I did the swap and a couple things I learned. Change your starter. I left my 5.3 starter and now I need to put the stronger 6.2 starter in. I bought the AFM Delete parts from Texas Speed. Nice guys gave me a deal on the LS9 cam. Not good for towing! Go with an RV cam if you're going to tow or haul anything. On the other hand if you want crazy sudden power let me know and maybe we can trade cams and you get my LS9 cam and I get the RV cam. Seriously. I think my 5.3 was better for towing. I'm sure that's all up to the cam.

Yeah, you gave up about 60 foot pounds of torque down low where its needed with that camshaft. Right on with the exhaust, the 5.3s is 2.75" and the 6.2s use 3.5"!

 

[ls1frc]

The ls9 cam is a poor n/a cam. It has a super late intake valve close event which reduces cylinder pressure. Good for blower.

Go with stock vvt cam or a small aftermarket vvt cam. I custom specced the one in my sig and it makes awesome torque down low.

Depends on what your goals are. Aftermarket Camshafts and headers have their downsides. Valvetrain will be louder. Lopey exhaust etc. Not everyone wants to deal with that tradeoff.