Ptkatoomer 114 Posted February 15, 2023 I've got a '16 KTM 350 EXC-F that I got virtually new less then a year ago. Since then I've put about 600 miles on it. I was draining the coolant to install some radiator guards and the coolant was dark, almost like coffee. Is this from engine oil getting in there? I must confess I only ever check the level by taking off the radiator cap, but I've never noticed any significant drop or weird color just looking in there. I then changed the engine oil and it was very dirty and somewhat low but not milky or anything like that. Are the 2 seals to the waterpump impellor the only way that something foreign could get into the coolant system? Does coolant get "dirty" like engine oil over time? Share this post Link to post Share on other sites
dirt dame 559 Posted February 15, 2023 (edited) Usually the oil will get light and muddy looking if it gets coolant in it. And often you can see some oil in the radiator too. Mucky coolant happens usually when Dexcool and another type of coolant gets mixed togeter. Flush it out and put fresh coolant in. Edited February 15, 2023 by dirt dame 1 Share this post Link to post Share on other sites
robertaccio 406 Posted February 15, 2023 (edited) just being a wise ass betta buy a Beta Edited February 15, 2023 by robertaccio 1 Share this post Link to post Share on other sites
