Coolant change
Le Mans Master
Joined: Jan 2016
Posts: 8,055
Likes: 2,694
From: New Mexico
2018 C6 of Year Finalist
And he still hasn't described the method he used to drain and fill. My advice is to start over if you think there's a problem.
Here's the process many have used:
Change coolant every 5 years or 150,000 miles, which ever comes first.
Buy 2 gals Prestone Dex Cool (Walmart) and 6 gals distilled water. I used 5 gals of distilled water this year
and flushed it twice. I think three flushes would have been better.
1) Drain coolant (drain plug is on passenger side). Approx. 8 qts out of 12.6 qts will actually drain.
2) Pull Surge Tank and clean out crud. Refill surge tank to the neck with distilled water.
3) Start engine, idle 4 min
4) Top off surge tank
5) Rev engine at 2000-2500 rpm for 2 more min. (temp should reach ~200 F)
6) Shutoff engine, cool for 20 minutes
7) Repeat steps 1-6 until fluid drains clear (2-4 flushes)
8) Refill with 6.3 qts Dex Cool (it's a slow process) and then top off with distilled water.
9) Repeat steps 3-5, take test drive, refill as necessary with distilled water.
10) Dispose of your old antifreeze at a recycling center.
Here's the process many have used:
Change coolant every 5 years or 150,000 miles, which ever comes first.
Buy 2 gals Prestone Dex Cool (Walmart) and 6 gals distilled water. I used 5 gals of distilled water this year
and flushed it twice. I think three flushes would have been better.
1) Drain coolant (drain plug is on passenger side). Approx. 8 qts out of 12.6 qts will actually drain.
2) Pull Surge Tank and clean out crud. Refill surge tank to the neck with distilled water.
3) Start engine, idle 4 min
4) Top off surge tank
5) Rev engine at 2000-2500 rpm for 2 more min. (temp should reach ~200 F)
6) Shutoff engine, cool for 20 minutes
7) Repeat steps 1-6 until fluid drains clear (2-4 flushes)
8) Refill with 6.3 qts Dex Cool (it's a slow process) and then top off with distilled water.
9) Repeat steps 3-5, take test drive, refill as necessary with distilled water.
10) Dispose of your old antifreeze at a recycling center.
Last edited by 919cw313; Sep 10, 2019 at 11:58 AM.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
205 to 210 is not a normal driving temp.. If your car runs a constant 205 -210 while driving down the road something is wrong ..Most run 194-196 while moving above 35 mph...There is probably air in the system that needs to work it's way out. Just drive it up to temperature, then let it cool off , then add more fluid ..After 3 or 4 hot/cool cycles the air will work out of the system and you should be fine...WW
Last edited by WW7; Sep 12, 2019 at 07:44 AM.
Drifting
Joined: May 2008
Posts: 1,517
Likes: 319
From: Hewitt TX
205 to 210 is not a normal driving temp.. If your car runs a constant 205 -210 while driving down the road something is wrong ..Most run 194-196 while moving above 35 mph...There is probably air in the system that needs to work it's way out. Just drive it up to temperature, then let it cool off , then add more fluid ..After 3 or 4 hot/cool cycles the air will work out of the system and you should be fine...WW
