The person who previously owned my BMW put cheap green brand x coolant in. I have decided to put in BMW brand coolant in. I have already drained the system to change the thermostat but I had noticed there was still very small puddles of coolant left in. The person I was working with already put everything back togethor. Should I ignore the small puddles and put the stuff in or should I fill the system with water let it run then drain, then put the BMW antifreeze in?
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.