changing anti-freeze
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Cruising
Joined: Oct 2008
Posts: 11
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changing anti-freeze
Can someone help old wrinkles out, if you flush the radiator and drain it if I put a 50/50 mix back in isn't there still a lot of plain water left in the block which would delute the mix? Thanks for the help.
wrinkles
wrinkles
Le Mans Master
Joined: Sep 2003
Posts: 8,847
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From: Longview Texas
The system holds 12 quarts, and you can drain about 8 quarts without draining the block.
If the block has 100% water, just add 6 quarts of pure Dexcool first, then add the last 2 quarts of water.
OR, you could add 4 quarts of pure Dexcool, then finish with 50/50 mix.
(you didn't already buy the pre-diluted Dexcool did you?)
If you have not already done the flush with water, and you did not push the antifreeze to the 5 year limit, I would just drain the 8 quarts and if it looks clean, just add 8 quarts of the 50/50 mix.
I never let my Dexcool go over about 2-3 years, so I just replace what I can drain without flushing the whole system. The antifreeze also lubricates the water pump, so I don't really like to run pure water even for short periods of time or drain all the liquid out of the pump while it is hot.
If the block has 100% water, just add 6 quarts of pure Dexcool first, then add the last 2 quarts of water.
OR, you could add 4 quarts of pure Dexcool, then finish with 50/50 mix.
(you didn't already buy the pre-diluted Dexcool did you?)
If you have not already done the flush with water, and you did not push the antifreeze to the 5 year limit, I would just drain the 8 quarts and if it looks clean, just add 8 quarts of the 50/50 mix.
I never let my Dexcool go over about 2-3 years, so I just replace what I can drain without flushing the whole system. The antifreeze also lubricates the water pump, so I don't really like to run pure water even for short periods of time or drain all the liquid out of the pump while it is hot.
Last edited by TEXHAWK0; Apr 5, 2009 at 06:48 PM.
Drifting
Joined: Jul 2007
Posts: 1,365
Likes: 1,818
with Texhawk0. He is right on the money. If you flush the system using water, you will end up with 4 or a little more quarts of water in the block. Need to add 100% Dex Cool for about 4 quarts ( resulting a near 50 50 mix in the cooling system) and then top off with a 50 50 mix..........
Drifting
Joined: Jul 2004
Posts: 1,370
Likes: 8
Sorry to highjack, but it is related...
If you drain the engine block by way of the drain plugs (and I am assuming there are the two standard 9/16 plugs above the oil pan & center of the block like the older model small block/Chevy), do you find leakage problems after reinstalling the plugs?
If you drain the engine block by way of the drain plugs (and I am assuming there are the two standard 9/16 plugs above the oil pan & center of the block like the older model small block/Chevy), do you find leakage problems after reinstalling the plugs?
Race Director
Joined: Oct 2007
Posts: 14,107
Likes: 26
From: 4th on the list of top 100 in USA Ga.
The system holds 12 quarts, and you can drain about 8 quarts without draining the block.
If the block has 100% water, just add 6 quarts of pure Dexcool first, then add the last 2 quarts of water.
OR, you could add 4 quarts of pure Dexcool, then finish with 50/50 mix.
(you didn't already buy the pre-diluted Dexcool did you?)
If you have not already done the flush with water, and you did not push the antifreeze to the 5 year limit, I would just drain the 8 quarts and if it looks clean, just add 8 quarts of the 50/50 mix.
I never let my Dexcool go over about 2-3 years, so I just replace what I can drain without flushing the whole system. The antifreeze also lubricates the water pump, so I don't really like to run pure water even for short periods of time or drain all the liquid out of the pump while it is hot.
If the block has 100% water, just add 6 quarts of pure Dexcool first, then add the last 2 quarts of water.
OR, you could add 4 quarts of pure Dexcool, then finish with 50/50 mix.
(you didn't already buy the pre-diluted Dexcool did you?)
If you have not already done the flush with water, and you did not push the antifreeze to the 5 year limit, I would just drain the 8 quarts and if it looks clean, just add 8 quarts of the 50/50 mix.
I never let my Dexcool go over about 2-3 years, so I just replace what I can drain without flushing the whole system. The antifreeze also lubricates the water pump, so I don't really like to run pure water even for short periods of time or drain all the liquid out of the pump while it is hot.
Drifting
Joined: Apr 2007
Posts: 1,496
Likes: 1
From: LEBANON PA.
Hi There:
On the c5 cooling system there are 2 engine block drains. The one on the left side is located at the engine mount bracket & the one on the right side is located behind the starter.You cannot access these drains plugs with the engine installed in the car.This means you can only flush the cooling system.
robsc501
On the c5 cooling system there are 2 engine block drains. The one on the left side is located at the engine mount bracket & the one on the right side is located behind the starter.You cannot access these drains plugs with the engine installed in the car.This means you can only flush the cooling system.
robsc501
