1999-2009 [Subscribe to Daily Digest] |
With the old green or blue coolant I used to see freeze plugs rot out on the C900s and 9000s at 50k. The only thing I see failing with Dexcool is plastic parts like heater valves and radiator tanks and those can go way before the time limit on Dexcool. I have not seen old Dexcool cause any problems even on poorly maintained cars.
Still I suppose it couldn't hurt to change it.
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