Flushing the radiator - 1997 SE - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-19-2005, 05:14 PM   #1
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Default Flushing the radiator - 1997 SE

All right, I did something stupid. I mixed green coolant into the existing red coolant because I was low and in a hurry. Now, my engine temps frequently go over 200 degrees Fahrenheit. It'* very normal, but it'* never gone that high before.

I'd like to flush out the coolant and pour in the new green stuff. (Matches my car ) I Googled it and came up with this:

1. Cool engine.
2. Drain the radiator, refill with water.
3. Start engine, let water circulate for ten minutes. Shut it off if it overheats.
4. Drain water, refill with coolant.
5. Start the car, let coolant circulate.

Where is the radiator drain? I looked under the car but I couldn't see it.
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Old 03-19-2005, 05:39 PM   #2
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Default Re: Flushing the radiator - 1997 SE

Quote:
Originally Posted by SignOfZeta
All right, I did something stupid. I mixed green coolant into the existing red coolant because I was low and in a hurry. Now, my engine temps frequently go over 200 degrees Fahrenheit. It'* very normal, but it'* never gone that high before.

I'd like to flush out the coolant and pour in the new green stuff. (Matches my car ) I Googled it and came up with this:

1. Cool engine.
2. Drain the radiator, refill with water.
3. Start engine, let water circulate for ten minutes. Shut it off if it overheats.
4. Drain water, refill with coolant.
5. Start the car, let coolant circulate.

Where is the radiator drain? I looked under the car but I couldn't see it.
The process looks good to me. I've never had to do it so I can't confirm that it'* bullet proof.

However, the petcock is on the driver'* side of the radiator, at the bottom. To access it you have to jack up the car, and remove the rubber dust shield. It'* held in with about 10 screws that have 10 mm heads. Remove that, look up on the driver'* side and there'* your pet ****.
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Old 03-20-2005, 07:35 AM   #3
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Prestone, and others I believe, makes a "Flush and FIll Kit". It contains some T fittings, that fit into one of the heater hose. The T has a cap where through an adapter that can be attached, you connect your garden hose. It also has an almost useless adapter to put on top of the radiator where the cap would go. This is supposed to give extra clearance to get the water away from the car. It'* way too short to be helpful and doesn't fit well The rest of it works quite well at totally back flushing the cooling system.
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Old 03-20-2005, 10:05 AM   #4
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the reason why you problably were overheating is that you topped it off with pure coolant, and pure unmixed coolant will not transfer heat as well as the 50/50 or 60/40 mix, that process that you guys listed looks good.......and i have the t, fitting in my heater hose, it works good, use it..........................

nicky
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Old 03-20-2005, 12:17 PM   #5
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Quote:
Originally Posted by Archon
Prestone, and others I believe, makes a "Flush and FIll Kit". It contains some T fittings, that fit into one of the heater hose. The T has a cap where through an adapter that can be attached, you connect your garden hose. It also has an almost useless adapter to put on top of the radiator where the cap would go. This is supposed to give extra clearance to get the water away from the car. It'* way too short to be helpful and doesn't fit well The rest of it works quite well at totally back flushing the cooling system.
I agree, the T-fitting is the way to go, you'll be waiting 45 minutes with that radiator drain plug to drain the system....
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Old 03-20-2005, 02:25 PM   #6
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No his mixture of straight or mixed coolant with water has nothing to do with it. It'* the fact that he mixed green with red.......Which turns into mud basically......Which then you have to get some pretty high power solevents and flush the systems to get the crap out. Now if he wouldn't have mixed Dex with the green stuff already....That list would have worked just fine.
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Old 03-20-2005, 03:39 PM   #7
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i agree with the sludge fact that dex and ethalene glychol makes i didnt think of that right away becasue they have that new mix w/ anything green stuff, ............if pure coolant does not make a difrece in cooling efficancy, then why dont we just put 100% pure coolant, will it gel up?

nickyyyyyyyyyyyyyyy
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Old 03-20-2005, 03:43 PM   #8
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First what kind of coolant was put into the car? I have actually use Prestone Green that was totally compatible with Dex Cool, at lesat thats what the bottle said... I have also used prestone Orange long life coolant which was also compatible with the Dex Cool coolant...

Take a good look at the bottle and see if the coolant you used was compatible with Dex...

Good Luck

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Old 03-20-2005, 11:04 PM   #9
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Quote:
Originally Posted by neekolas
if pure coolant does not make a difrece in cooling efficancy, then why dont we just put 100% pure coolant, will it gel up?

nickyyyyyyyyyyyyyyy
Pure water is the best for cooling, however it will freeze and of coarse, provides no anti corrosion capability. Pure coolant is the best for freeze protection but does not cool near as well as water and will actually lower the boiling point, plus it is very viscous and does not flow as well. A 50/50 coolant and distilled water mix is the best.
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