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Replacing Thermostat?

Donne Trav

Well-known member
Joined
May 19, 2008
Messages
261
Location
Washington, DC
Corvette
1994 Blk/Blk
To prevent spillage, should I "drain or extract" some coolant in my '94 before replacing my thermostat? Thanks
 
Depends.
When was the last time you changed the coolant?

If it's been more than 3/36,000, I'd drain the entire system, flush once with water, then change the 'stat and refill with a fresh 50/50 mix of antifreeze and water.
 

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