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How to drain Radiator?

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Old Apr 14, 2003 | 12:03 AM
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Drunken_Polak's Avatar
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From: Winnipeg, MB, Canada
How to drain Radiator?

Well... for emergency reasons (so i could get home without overheating to much) i filled my cooling with water/anti-freeze with a 75/25 ratio (water being the bigger)... now i wana drain it and put some proper engine coolant in... How?
and whats a good ratio...(for summer)

my search didnt find anything for this topic when i searched....if this is a repetative post sorry
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Old Apr 14, 2003 | 12:10 AM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Look for a drain on the back side of the rad at the bottom of the driver's side.
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Old Apr 14, 2003 | 12:25 AM
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heh...thanks....i guess i cant find it cuz its to damn dark in my garage at night... ill look again tommorrow
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Old Apr 14, 2003 | 12:28 AM
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From: San Jose, CA, USA
Car: 88 IROC-Z - original owner!
Engine: LB9 with K&Ns, MSD, Foil, Taylor
Transmission: WC T-5
Axle/Gears: BW 9-bolt, 3.45 posi
My drain is on the passenger side, below the hose connection.
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Old Apr 14, 2003 | 12:36 AM
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so....should i just go straight engine coolant??
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Old Apr 14, 2003 | 01:23 AM
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From: Oswego, IL
Car: 1989 Iroc-Z
Engine: 350ci SBC
Transmission: 700R4
The proper mixture is 50% distilled water and 50% antifreeze. The drain plug is on the passenger side below the lower radiator hose.
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Old Apr 14, 2003 | 09:18 AM
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alright....thanks
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Old Apr 21, 2003 | 12:04 AM
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From: Duncan, OK USA
Car: 1987 Z28
Engine: LG-4 305
Transmission: 5-speed
Originally posted by Slow89Iroc-Z
The proper mixture is 50% distilled water and 50% antifreeze. The drain plug is on the passenger side below the lower radiator hose.
I was going to note that I thought they were all on the bottom of the passenger side.

If you want to avoid doing the mix thing, I"ve noticed a lot of stores selling the premix, which is cheaper as I guess you are not paying for the full strength stuff!

I am planning on trying it!
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Old Apr 21, 2003 | 01:27 AM
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Does that even really matter? The mixture i mean, if you live in a place that never really gets cold at all I mean couldnt you put mostly water and have no problems, thats what im basically doing.
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Old Apr 21, 2003 | 01:35 PM
  #10  
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From: Duncan, OK USA
Car: 1987 Z28
Engine: LG-4 305
Transmission: 5-speed
Originally posted by DevilsAddvocate
Does that even really matter? The mixture i mean, if you live in a place that never really gets cold at all I mean couldnt you put mostly water and have no problems, thats what im basically doing.
My understanding is that it is called "antifreeze", but it also helped the cooling system in summer & reduces or slows down corrosion.
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Old Apr 22, 2003 | 08:45 AM
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I'd put 60% antifreeze and 40% water in the radiator, and then add a bottle of water-wetter to improve cooling in hot weather.
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Old Apr 22, 2003 | 12:06 PM
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From: Guatemala, Central America
Car: '90 Camaro RS T-Top
Engine: 5.0 TBI
Transmission: TH700R4
Water has better thermal conductivity properties than antifreeze, so based on that, it would be ideal to use only water. However, antifreeze is used to lower the freezing point of water, so if you live in a cold zone, all the water inside you system won't turn to ice, when you park your car.
Antifreeze also has elements in its chemical mixture, that prevent rust and scale to form inside the cooling system, as well as lubricating properties, for the water pump.
To get the best of both worlds, a mix of 50% water and 50% anti freeze should be used, if you live in a warmer climate (like I do) you can go to 25% anti-freeze and 75% water.
Never use just straight antifreeze or straight water.
When you change your antifreeze, clean up any spills (it won't evaporate) and don't leave open containers or pans with antifreeze in it if you have small children or pets. It tastes sweet, but it is poisonous, and I don't want you to have one less member in the family.
When you change the antifreeze and water, take the time to check all hoses, change the thermostat (it is cheap) and make sure all clamps are properly tightened.

Take care (of your F-Body!)
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