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      07-21-2020, 06:46 AM   #3
juld0zer
Lieutenant Colonel
Australia
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Drives: Prev 135i 7DCT, Now 130i 6sp
Join Date: Jul 2016
Location: 2153

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Wash it down thoroughly and recheck it. If you have a compressor and air blast gun, use that and brake cleaner simultaneously to clean stubborn or difficult (troughs such as this area) areas. For bulk cleaning I prefer to spray on a 50/50 solution of sodium hydroxide based degreaser and water. Hose or pressure cleaner it off after 10mins, blow it dry and brake cleaner the rest.
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