[DeTomaso] Cleaning rust out of the console heater tubes

[Mike Thomas]

I've finally removed my heater valve to rebuild it, and after not having any
fluid in the pipes under the console for a long time, there is a fair amount
of rust flake.  I want to avoid getting that flake into my cooling system
and compromising my new radiator, so the question is how to try to clean up
the inside of the pipes before I put the valve and new hoses back on and
fill the heater system.

I've thought of devising some kind of long wire pipe cleaner that I can run
the length of the pipes, but access at either end to get it in and work it
is a bitch.  I'm not sure flushing it with water will do as much as the hot
water coming through the system.
I wonder if just forcing a length of course hemp rope through and working it
will do the trick, then running water through.

I'm looking for suggestions.  I realize I kind of screwed myself by not
keeping fluid in the pipes far the last few years. The pipes seem to be a
pretty stout steel, so I'm not too worried that they've rusted through.
Guess I'll find out though.

Thanks in advance.

Mike Thomas