2008 silverado 1500 lt. want to swap 5.3 to 6.6l duramax.

[liftedsilverado08]

need help with best route!! motor blew and rebuild will cost roughly 7-10k anyways. i just replaced the lifters and they are bad again instead of rebuilding can i just put a 6.6l duramax in and do some work? 

[CamGTP]

The duramax weighs basically triple what a 5.3 does, so remember that.

 

Everything will be custom. A few guys have done it but it's a very lengthy process. Have to make a new crossmember and motor mounts, need to run a aftermarket suspension setup with coil overs to handle the weight. Then you have to figure out what transmission you need/want to run with it and make custom mounts for that too. Whole entire new fuel system for the diesel engine, intercooler setup, larger radiator and so on.

[KARNUT]

I know of an old Chevy dualy with 12 valve conversion years ago. And a ram charger with a 4 cylinder Cummins. He got the engine from us. Drove that thing for years delivering parts. In this case it’s too new. I’d go with a modified 5.3. It’s more straightforward probably way cheaper.  

[swathdiver]

https://www.tahoeyukonforum.com/threads/for-sale-2011-5-3-lc9.138687/#post-1741677

 

This is way less expensive and aggravating!

Edited December 29, 2022 by swathdiver

[64BAwagon]

I would bet theres nowhere near enough room under that hood to jam a 6.6L into that chassis. Especially when you consider the radiator and intercooler sizes. 

[CamGTP]

It can be done. The body is same on a 2500/3500 so the engine fits, it's just making it fit the frame with modifications and grille. Aftermarket radiators and intercoolers would need to be used.

 

Here is a build thread on a 2001 truck from years ago. Stuff starts to happen on page 4.

 

https://www.performancetrucks.net/forums/projects-gallery-189/back-game-rcsb-1500-d-max-swap-coming-514649/page4/

[swathdiver]

On 12/29/2022 at 8:28 AM, 64BAwagon said:

I would bet theres nowhere near enough room under that hood to jam a 6.6L into that chassis. Especially when you consider the radiator and intercooler sizes. 

 

Duraburb does 1500 conversions with those motors.  When they're done, it all looks stock.

Edited December 30, 2022 by swathdiver

[64BAwagon]

I am sure it can be done, with enough money anything can be done. The question is why ?