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Old 03-07-2013, 10:19 AM
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Quote:
Originally Posted by nebilex View Post
Hi do i still need to drain all the coolant if i am only changing the thermostat? Also how did u clean the surface after removing the thermostat?
I don't believe it's necessary to drain all however you will lose whatever is in the hoses when you disconnect. But chances are if you're replacing the thermostat due to age/time, it might be a good idea to replenish the coolant as well.

As for the surface it was pretty clean and I just wiped it. I would suspect if you had any more than surface residue it's probably due to corrosion of some sort and you might have to get a little more aggressive with a cleaning agent or even something to chip away at it. Be careful not to score the flange as you don't want to cause a leak.
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