1htfm7r¶

1 excerpts.

Reddit thread: Milky¶

reddit.com/r/MechanicAdvice/comments/1htfm7r · p. 1 · Applies to: 451

Source: r/MechanicAdvice (score 17, 12 comments) Topic: Head gasket / coolant leak / condensation Models discussed: 451 Solution status: unclear

Problem: Milky substance on oil cap with coolant dropping with no apparent leak and oil level above max on a 2016 Smart ForTwo 900cc 3-cylinder engine.

Solution: Multiple diagnoses proposed: condensation from short trips (take long drives to proper operating temperature); possible blown head gasket (coolant loss + milky oil combination); or coolant system seepage requiring pressure test. Unresolved - no confirmed fix provided.

Key facts: - Milky substance on oil filler cap observed after recent oil change - Coolant level dropping without visible external leak - Oil level above maximum despite recent oil change - Engine not overheating and drives normally - Two competing diagnoses: benign condensation vs. blown head gasket