Engine change

[Mitten Diver]

I am going to replace the engine and trans with 170000 on it. I want to replace my MDS engine with a VVT engine. Do I need to replace my computer for this option?

 

[Mitten Diver]

Please help. I am about a week away from ordering the new engine.

 

[Wild one]

I am going to replace the engine and trans with 170000 on it. I want to replace my MDS engine with a VVT engine. Do I need to replace my computer for this option?

Unless your truck is older then 2008,you already have a 5.7 equipped with both VVT (variable valve timing) and MDS (multi-displacement system). They are 2 totally differant systems.VVT advances and ******* the camshaft in relation to engine rpm,while MDS basically shuts down cylinders by collasping the lifters.That's a basic laymans explanation,but if you're doing an engine swap on a 1500 newer then 08 ,your original engine has both systems.

 

[jws123]

Howcome you are replacing engine and trans? I wouldnt do it unless there is a issue I have 230k on my orig engine and tranny lol 170k is nothing for these trucks.

 

[MOPAR78]

Howcome you are replacing engine and trans? I wouldnt do it unless there is a issue I have 230k on my orig engine and tranny lol 170k is nothing for these trucks.

Good question. I'm over 318,000 on mine.