Was having a look round a friends 1.9 tdi T5 last night and came across some brown fluid (thickish) on the undertray and what looks like some rusty water on the block just above where the sump plug is, any ideas where this is coming from?? Was dark by the time I had taken some pics so will be having a proper look for him today. I should point out that the all fluid levels are normal the coolant is pink not rusty brown.
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