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ittlfly · 12-11-2010

Hey Guys...Here's an update.....I finally got a ''few minutes to myself'' to change out the antifreeze. In draining the radiator I only got approx 6 measured quarts. and....just over 2 quarts out of the overflow bottle.

Since the system holds about 15 quarts, I left about 1/2 behind in the block??. By not opening the T-stat housing I*assume* that made the difference. I don't understand why I didn't get more out via the radiator??

I guess that it will be fine since the coolant is changed out every year. (done in previous years by the dealer).

I did however use the coolant sold at Napa auto supply that meets GM 1825-M mixed 50/50 with distilled water. Maybe next year I'll be brave enough to crack the T-stat housing and get most of the coolant flushed out.

BTW..no problems on the refill with air blocks. I did do the filling real SLOW though.

12-11-2010	#9
ittlfly Join Date: Jul 2009 Location: Redding Calif Posts: 223	Re: Cooling System R&R Hey Guys...Here's an update.....I finally got a ''few minutes to myself'' to change out the antifreeze. In draining the radiator I only got approx 6 measured quarts. and....just over 2 quarts out of the overflow bottle. Since the system holds about 15 quarts, I left about 1/2 behind in the block??. By not opening the T-stat housing Iassume that made the difference. I don't understand why I didn't get more out via the radiator?? I guess that it will be fine since the coolant is changed out every year. (done in previous years by the dealer). I did however use the coolant sold at Napa auto supply that meets GM 1825-M mixed 50/50 with distilled water. Maybe next year I'll be brave enough to crack the T-stat housing and get most of the coolant flushed out. BTW..no problems on the refill with air blocks. I did do the filling real SLOW though.