Cleaning engine parts and cooling system

[eyvind.spangen@c2i.net (Eyvind Spangen)]

Two questions:

1. I need to clean the engine on my car. The intake manifold (the big
one with "turbo" on top) is dirty. After removing and doing a heavy
wash with degreaser and stuff, I got all the dirt away, but it's still
not clean. It has got small black/yellow dots, just corroded. Due to
the uneven surface of it, I can'nt use the normal metal polish and a
cloth. Anyone BTDT? I want it clean and shiny, like it is underneath
the hose that connects the turbo to it.. Possible at all? Any tips on
getting it nice?


2. A cracked head blew a lot of soot into the cooling system. I've
cleaned out the radiators, engine and tubes pretty well (not that
bad), but the expansion tank is covered with some black goo on the
inside, and due to the "wall" inside, I can't get a brush on the side,
and no brush big enough to use into the small hole on the underside.
Will a normal cooling system cleaner (the kind you pour into the
coolant and leave the engine running for a while) remove this? I think
it's more a "looks" problem, as it doesn't look like it will make any
damage, but it looks like I'm driving with a engine on the edge to
breaking down.. :-) I've tried leaving the reservoir for a few days
with both dishwasher and degreaser, and it made the goo go easy away,
but not without using a brush to loosen it first. Boiling water didn't
help either.. What can I do to remove that gunk?

Thanks,
ES