Discussion Starter · #1 ·
Hi guys. I've got a question based on a 2003 525 with 145,000 miles on it. Around 10,000 miles ago, I did the full cooling system overhaul as recommended based on CN90's and Bluebee's posts/recommendations. (Great information as always!) Occasionally when I park the car after a drive of greater than 15 minutes, I get a strong smell of coolant, the sound of a few drops of fluid dripping onto a hot engine component (I'm assuming coolant), and a small pool of coolant on top of the coolant reservoir bleeder screw. I never see any coolant or fluid of any sort on the ground afterward (Except for A/C condensation which it has always done). Everything else appears to be functioning correctly, car is not overheating, engine compartment is dry, and like I said these symptoms appear only occasionally (Once every couple of days). My questions are, what is the purpose of the bleeder screw at the reservoir, is this a common issue, do I need to bite the bulllet and buy a new reservoir or is there a simple fix to the leaky screw, and does it sound right that a small leak from the bleeder screw could somehow blow coolant onto hot engine components but not have any drip onto the ground? Am I overlooking a bigger issue/leak somewhere?