How to completely disable cylinder deactivation?

[N7turbo]

The problems that come from cylinder deactivation come from the design of the cylinder head and torque converter to accommodate it, not from the activation of the feature while driving. I doubt deactivating it will accomplish anything, but you're free to try and report back.

 

[Mulligan]

The problems that come from cylinder deactivation come from the design of the cylinder head and torque converter to accommodate it, not from the activation of the feature while driving.

That's probably right.

However, the temperature difference between active and deactivated cylinders likely adds stress to the head. That extra stress acting on the poorly designed (or poorly manufactured) cylinder head could be the straw that breaks the camel's back and results in a crack. If that's the case, disabling cylinder deactivation could reduce the likelihood of head failure.

Speculative, but not irrational.

I can't blame anyone for wanting to disable their cylinder deactivation on the chance there's something to the heat/stress hypothesis.