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OB Gearheads
Posted on 1/27/14 at 1:45 pm
Posted on 1/27/14 at 1:45 pm
I want to swap the LS 5.3 engine in my Avalanche for a LS 6.0 or 6.2. How hard would it be? I haven't done an engine swap in 20 years. School me.
8
Posted on 1/27/14 at 2:04 pm to HeadSlash
Shouldn't be hard to do the swap. Don't know if you have a 4L60 in yours or a 6L80. IIRC, the bigger motors came with a 4L80 first, then a 6L80. Best bet would be you pulling the engine/tranny combo.
You'd also have to send your ECU to get a custom flash, or take the one from the donor engine and get a custom flash on that.
That is just the standard protocol stuff. If you can actually do the mechanical parts of the swap in a day or two, I'd plan being without a truck for a few weeks getting the kinks worked out
You'd also have to send your ECU to get a custom flash, or take the one from the donor engine and get a custom flash on that.
That is just the standard protocol stuff. If you can actually do the mechanical parts of the swap in a day or two, I'd plan being without a truck for a few weeks getting the kinks worked out
Posted on 2/13/14 at 9:21 am to Hammertime
What if I just changed the motor out with another 5.3?
Posted on 2/13/14 at 9:27 am to HeadSlash
quote:this would be your best bet. Get a non AFM motor,ls6 to be exact.
What if I just changed the motor out with another 5.3?
You having some issues with your motor?
Posted on 2/13/14 at 9:41 am to HeadSlash
Would have to be the same model year for plug and play.
MJ2 is right. Don't get an AFM motor. IIRC, they are the 2007+ 5.3s
Get a 6.0 from a 2500 if you want to go that route. You should snag the trans also
Eta: LS6 or LY6 mated with a truck transmission. 4L80E for younger than 07, and 6L90E for after 07. I think the auto for the LS6 is either a 700r4 or a 4L60E IIRC. The LS6/4L60E/6L80E stuff out of corvettes and the like will be harder to mate with your everything than the LY6/6L90E. One is for a car and one is for a truck
MJ2 is right. Don't get an AFM motor. IIRC, they are the 2007+ 5.3s
Get a 6.0 from a 2500 if you want to go that route. You should snag the trans also
Eta: LS6 or LY6 mated with a truck transmission. 4L80E for younger than 07, and 6L90E for after 07. I think the auto for the LS6 is either a 700r4 or a 4L60E IIRC. The LS6/4L60E/6L80E stuff out of corvettes and the like will be harder to mate with your everything than the LY6/6L90E. One is for a car and one is for a truck
This post was edited on 2/13/14 at 10:03 am
Posted on 2/13/14 at 9:47 am to Hammertime
quote:
Don't get an AFM motor
Posted on 2/13/14 at 10:05 am to meauxjeaux2
I have heard them knocking on heaven's door on more than one occasion 
You can get rid of both AFM and torque mgmt with some $$$ and a tune though. Supposedly the fix that GM came up with was to replace the pistons/rings. Mainly happened on 07-09 trucks
You can get rid of both AFM and torque mgmt with some $$$ and a tune though. Supposedly the fix that GM came up with was to replace the pistons/rings. Mainly happened on 07-09 trucks
Posted on 2/13/14 at 10:22 am to Hammertime
yeah I know you can but it's so cost prohibitive you may as well do a motor swap.
Posted on 2/13/14 at 10:53 am to HeadSlash
Weve converted a few'from 4.8/5.3 to 6.0/6.2. Its no diff than going back w 5.3.
Posted on 2/13/14 at 11:02 am to HeadSlash
Just get a new truck
Posted on 2/13/14 at 11:06 am to HeadSlash
Put a 351W in it.
Posted on 2/13/14 at 11:11 am to greasemonkey
How are the transmissions holding up with the extra 100hp and tq?
Correct me if I am wrong, but isn't it "basically" all plug and play, with a flashed ECU?
Correct me if I am wrong, but isn't it "basically" all plug and play, with a flashed ECU?
Posted on 2/13/14 at 11:34 am to greasemonkey
any luck with getting an AFM lifter to unstick?
Dealing with an 09 Z71 right now with the intake cam on #7 stuck closed.
Was thinking about emptying half the oil out the motor and dumping some ATF in and running it to see if it unclogs the lifter or the port going from the Oil manifold to the lifter.
Dealing with an 09 Z71 right now with the intake cam on #7 stuck closed.
Was thinking about emptying half the oil out the motor and dumping some ATF in and running it to see if it unclogs the lifter or the port going from the Oil manifold to the lifter.
Posted on 2/13/14 at 11:47 am to Clames
quote:
Put a 351C in it.
I know that's what you really meant.
Posted on 2/13/14 at 2:23 pm to HeadSlash
It shouldn't be difficult as far as engine swaps go. I'd bet an engine from the same year would be pretty much plug and play.
Posted on 2/13/14 at 6:45 pm to Hammertime
quote:
How are the transmissions holding up with the extra 100hp and tq?
nit very well.
We put 4l80s in most
yes they are plug and play.
Just reflash ecm. we usually change the camshaft to
This post was edited on 2/13/14 at 6:47 pm
Posted on 2/13/14 at 6:46 pm to HeadSlash
I'd swap in an 8.1 vortec if I could find one. It's probably the most durable gas burner ever built by anybody.
Posted on 2/13/14 at 6:51 pm to meauxjeaux2
quote:
any
quote:
any luck with getting an AFM lifter to unstick?
Dealing with an 09 Z71 right now with the intake cam on #7 stuck closed.
Was thinking about emptying half the oil out the motor and dumping some ATF in and running it to see if it unclogs the lifter or the port going from the Oil manifold to the lifter.
ive tried in 4 diff engines with seafoam it work on 3 for diff lengths of time. 2 of them eventually broke the lifter.
Put a ls1 lifters in them and change the plate under the intake with the solinoids(sp)
Then have the computer reflashed.
Posted on 2/13/14 at 6:58 pm to DownshiftAndFloorIt
quote:
'd swap in an 8.1 vortec if I could find one. It's probably the most durable gas burner ever built by anybody.
I love the 8.1 but it is very expensive to modify.
I can buy used 6.0 does for less than $800 all day. put a cam in then reflash ecu. makes Over 450hp and cost about 2500$ installed.
Posted on 2/13/14 at 8:07 pm to greasemonkey
As In poured Seafoam down the lifter bore? ?
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