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      12-14-2012, 07:36 AM   #3
dotmit
Private First Class
United Kingdom
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Drives: E93 325i | K46 S1000RR
Join Date: Nov 2012
Location: EC3

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Odd that the top is hotter. If it was an airlock I'd expect it to be the other way round.

Could be that the radiator has corroded inside and is now just a big empty tank instead of having pipes through it, and so convection is naturally making the top hotter? Long shot I know!
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