I picked up a new rebuilt 4.7, and new warranty states the intake manifold must be cleaned out before installation. It appears to be a sealed unit? Appreciate any help on this one, thanks in advance

 

i used sea foam deep creep, and a wire hanger and an air compressor.

if its really gunked on you could soak it over night. just make sure after your all done to rinse it out real well and make sure its dries completely.

 

Do I just shoot the foam in through the throttle body? Will it come out through the bottom with air pressure? Thanks!