Is it true that when disassembling the intake manifold and taking a look inside the engine, carbon is gonna be all over the place blocking the pipes (i think thats what its called). Well a couple of auto-shops i have been to, are certain that after 80.000 klm there needs to be a cleaning from carbon, and the only way to make sure fo this is to disassemble the intake manifold and take a look! Personally, i think that they just want to make money out of this. So im trying to gather info if this (intake manifold disassembly) is really needed to be done. So i was wondering if we could gather here photos from how it usually looks inside the intake manifold and decide if this is really needed to be done!