An engine has recently begun using a lot of oil and the coolant is foamy and brown. Which of the following is likely to have caused this problem?

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An auto mechanic can get certified by taking the Automotive Service Excellence (ASE) exams, covering fourteen different subject areas, such as diesel and gas engines, trucks, buses, damage repair, auto components and much more.


An engine has recently begun using a lot of oil and the coolant is foamy and brown. Which of the following is likely to have caused this problem?