Engine swap in 2009 GMC Yukon

[kenbaker]

Has anyone ever swapped on a 2009 Yukon 6.2 to a 5.3 2008 Suburban engine

 

[kenbaker]

Just curious what problems I might run into

 

[Sparkyz07Denali]

6.2L to a 5.3L?

im curious why you would want to?

 

[kenbaker]

Because I have a chance to buy it a '09 Yukon and I have a engine and excellent condition out of a 2008 Suburban

 

[Charlie207]

6.2L to a 5.3L?

im curious why you would want to?

more power!

I think it should be pretty straightforward, but there's a few others that will certainly chime in with the Cliffs Notes.

 

[Geotrash]

Because I have a chance to buy it a '09 Yukon and I have a engine and excellent condition out of a 2008 Suburban

If there's nothing wrong with the 6.2, I would keep it. It's a sought-after engine for these trucks. I've been here a long time and not once have I ever seen anyone go from a 6.2 to a 5.3. Plenty of people going the other way though.

To answer your question, it will bolt up and the harnesses should be the same. Most of the work would be in the electronics and tuning. The 6.2 has larger fuel injectors and also has VVT, which your 5.3 may not have, and possibly AFM, which it *will* have. So those parameters would all need to be accounted for in the tune.

 

[kenbaker]

Thank you yeah the six two is bad I'm buying the truck with a bad engine and the five three does have a FM that's what I was concerned about fuel delivery and such as far as fuel pressure and injectors I don't know if they'll swap out or not that's what I was wondering I could swap intakes plenums exhaust manifolds the Denali has headers on it

 

[Geotrash]

Thank you yeah the six two is bad I'm buying the truck with a bad engine and the five three does have a FM that's what I was concerned about fuel delivery and such as far as fuel pressure and injectors I don't know if they'll swap out or not that's what I was wondering I could swap intakes plenums exhaust manifolds the Denali has headers on it

Any idea what's wrong with the 6.2?

 

[Charlie207]

If there's nothing wrong with the 6.2, I would keep it. It's a sought-after engine for these trucks. I've been here a long time and not once have I ever seen anyone go from a 6.2 to a 5.3. Plenty of people going the other way though.

To answer your question, it will bolt up and the harnesses should be the same. Most of the work would be in the electronics and tuning. The 6.2 has larger fuel injectors and also has VVT, which your 5.3 may not have, and possibly AFM, which it *will* have. So those parameters would all need to be accounted for in the tune.

Does anyone know if BlackBear Performance has a base tune for this swap?

 

[Geotrash]

Does anyone know if BlackBear Performance has a base tune for this swap?

They don't do 'base' or canned tunes. They can send you a tune that will get you up and running and then when you do a datalog session they will send you a new tune based on the data.

 

[Charlie207]

They don't do 'base' or canned tunes. They can send you a tune that will get you up and running and then when you do a datalog session they will send you a new tune based on the data.

Right, when I got my BBP tune that's what they did for me. It was base tune, to get data from, and then update.

I'm just curious if they also have a base tune for a 5.3 to 6.2 swap because it's a popular enough upgrade; just thinking out loud.

 

[swathdiver]

Has anyone ever swapped on a 2009 Yukon 6.2 to a 5.3 2008 Suburban engine

They are nearly the same physically. The 6.2 has VVT and the 5.3 has AFM. So when you put the 5.3 in the '09, the computer will be looking for VVT and not AFM. A tuner can turn off the VVT stuff. They will also need to adjust the tune for the smaller injectors and of course the motor makes nearly a hundred horsepower less.

5.3 is great little motor, but it's not a 6.2 and you have the best 6.2 of them all, the L9H.

You don't have to do anything different with the drivetrain, the 5.3 will bolt right up and go with it. They use the same exhaust manifolds so it will work seamlessly with your exhaust system too.

What's wrong with the 6.2?

Ohh, do you know which 5.3 it is? LMG, LC9 or LY5? The first two are FlexFuel, one iron, the other an aluminum block. The LY5 is not flexfuel with an iron block.

 

[kenbaker]

The Suburban that I had was a Kansas City highway department truck very well maintained low mileage all aluminum engine had plenty of power will the injectors interchange if I change intake

 

[kenbaker]

I understand most people go bigger because they want more power I feel it has plenty of power in this engine I drove the vehicle I own the vehicle for a while it got crashed and I kept the drivetrain

 

[kenbaker]

The 62 dropped some piston rings on one cylinder

 

[kenbaker]

It has 150,000 on it not sure what it would take to repair unfortunately you don't know if the extent of the damage until you get it apart I can look through the cylinder spark plug hole with a scope and see the ring laying on top of the piston the oil ring

 

[kenbaker]

The five three ran so well I thought it was a 60 I mean this thing really moved

 

[swathdiver]

The 62 dropped some piston rings on one cylinder

Were you running regular gas in it? We see this after about 100K with folks using 87 octane in their high compression engines.

Either way, fixing up the original engine would be my suggestion. What state do you call home?

We'll be glad to help you swap the LC9 in place of the L9H.

 

[kenbaker]

Were you running regular gas in it? We see this after about 100K with folks using 87 octane in their high compression engines.

Either way, fixing up the original engine would be my suggestion. What state do you call home?

We'll be glad to help you swap the LC9 in place of the L9H.

I don't know what fuel they ran I bought it like that

 

[kenbaker]

And I'm in St Louis