Thanks Klause –
After further research I’m starting to lean towards the radiator. Our 850 has never overheated so I think the head gasket is a long shot. I will replace the radiator next weekend and flush the coolant system again. Unfortunate, I replaced the radiator about 35K ago with an aftermarket brand when the neck for the upper hose cracked on the factory unit. I now regret saving the $$ on the cheaper radiator I bought online. Do you have any input on the quality of the radiators sold at IPD – I live about 15 minute’s from their facility. Or – should I just go with a factory unit from the dealer? Thank you
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