i got got home and heard a hissing noise from the engine, i saw some smoke and a bit of coolant, what can it be?

Asked by Mar 16, 2015 at 12:15 PM about the 2002 BMW 3 Series 325i Sedan RWD

Question type: Maintenance & Repair

2 Answers

264,365

Coolant escaping from the expansion tank or hose. Replace ASAP before you overheat causing more damage......http://forum.e46fanatics.com/showthread.php?t=914109

2 of 2 people found this helpful.

Tom, this the expansion tank the same as the resevior? The hissing was coming from the thermostat area.

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