Intake manifold blockade?

RogerRamRod said

Can you elaborate on why this will junk an engine?
I tend to clean anything/everything just on principle if I have it apart, but I'm curious about what is so devastating up under there. Old high mileage motors have lots of baked-on sludged-up stuff in them, no?
Obviously, if one was going to sandblast the intake, you'd want to get the media out from under, etc.

Click to expand...

Post 12 pretty much covers it.

I tell people that don’t think it needs to come off to hot tank the **** out of the intake, and do all the voodoo **** that guys do to make themselves feel better and once you think it’s squeaky clean pull the pan off.

Most people are stunned what still in there. And it will kill an engine so fast you can count the time to full destruction in minutes.

It has to come off. Most reasonable people would NEVER think of putting a dirty, unclean part on a new engine but that’s what happens if you don’t take that cover off.