It is common for these cars to have old coolant in them...and often the wrong type.

Flush well (until clear) and replace with Zerex G-05. Check all your hoses at the same time.

__________________
2009 VW TDI Jetta Sportwagon 172k miles (rear-ended harder than Elton John on 8/4/13. Total loss)

1991 Volvo 240 142k miles (T-boned by a stop sign runner. Total loss)