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gunk in the expansion tank

2K views 7 replies 5 participants last post by  symon 
#1 ·
hi i have some kind of gunk in the expansion tank in my alfa romeo 147 2002 and wondering if anybody knows how to get rid of it or why its there
 
#8 ·
My 156 had a grey deposit in the expansion tank.

I managed to clean it all out when I did the thermostat, it wasn't oily though and when spread onto some cardboard it dried into a fine dust. :confused:

If it isn't oily I wouldn't worry about it too much, although as others have said it may be left over from previous work done.
 
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