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Topic: Best Way to Flush Cooling System?

in Forum: C3 Cooling and Heating Systems


Best Way to Flush Cooling System?

Posted: 7/31/09 7:29am Message 1 of 11
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
I've been driving this thing some for the last couple of months and everything is fine except my coolant looks a little dirty. I flushed it out once before I got it running and I think maybe I'll flush it this weekend. I'm running strait water in it right now because I new I would flush it out soon. Looks like it has loosened up any stuff that was in the system and just needs rinsed out. What is the best method of flushing the system out. My heater core is bypassed so it's just engine and radiator. Do they still make the old Prestone "Flush and Fill kit". I remember the little fitting they had that went in your heater hose that you hooked to your water hose. Who has the best method?


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Best Way to Flush Cooling System?

Posted: 7/31/09 11:17am Message 2 of 11
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Manteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
I'm almost certain that they do. I've got one hanging on my wall from "Victor Products Inc." Although I've had it for a few years that should be a regularly stocked item at most any parts store.


Best Way to Flush Cooling System?

Posted: 7/31/09 1:51pm Message 3 of 11
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
I use the prestone F&D kit it works the best in my opinion on all my cars, the problem is they only give you one hose fitting for each hose so if you have several cars you have to buy another kit......WRRONG!..... Napa sells the fittings, no need to buy another kit, as far as just running straight water Thumbs Down thats a no-no unless you put a bottle of prestone cooling system lubricant along with the water, without any rust inhibitors soon as the water gets in there the block and cooling system will begin  to rust, it doesn't take long, if the heater core is good I would hook up the hose's and flush everything, because I run a 30 /70 antifreeze to water mix because it cools better and I live in Calif, I also run a bottle of the Prestone cooling sys lube along with the antifreeze, my radiator still looks new inside. anips2009-07-31 13:54:39


Best Way to Flush Cooling System?

Posted: 7/31/09 2:54pm Message 4 of 11
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
I stopped at O'Reilly's on the way home from the office, and picked up a Prestone Kit. I'll flush it tomorrow and put in some antifreeze and some lube. I plan on taking my top heater hose loose and putting a short piece of hose on my water pump and the fitting in between, then removing it when I'm finished. I'm not going to leave it on permanently. Where should I flush the water out...no cap on the Radiator, should I pull the top Radiator hose off? I guess I hadn't noticed that you could still buy these things. I'm glad you mentioned the lube. I've never used it.
Thanks



Best Way to Flush Cooling System?

Posted: 7/31/09 5:28pm Message 5 of 11
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
don't know, I sold my big block car, you can't pull the top hose cause the motor has to run during the flushing procedure, my guess is the exspansion tank, rusty water will stain your concrete drive and curb and gutter piss off the neighbors and will not come out, I know cause I'am a cement finisher by trade, I flush out the water on my property, by the photo of your car I see a nice big lawn or the planter, I also rigged up a graden hose to the exit spout and ran it out and over the fenders so as not to get rusty water all over the engine compartment and car  thrown by the fan, it might leak a little, wrap a towel around the exspansion tank and have some extras, the water doesn't exit at high pressure, more like one turn on the hose bib, have fun.   anips2009-07-31 17:40:15


Best Way to Flush Cooling System?

Posted: 7/31/09 6:20pm Message 6 of 11
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
Well I got bored....the Wife had a little get together she had to go to and the son went camping so I decided to flush it tonight. Anips, I rolled it down to the gutter to flush it as not to stain the driveway...I'm glad you mentioned that. I rigged up a piece of plastic and let it run out of the overflow tank. Worked like a charm. Let it run for about 5 minutes and then started the Engine and let the water run for about another 5 minutes. The water was real clean so buttoned it all back up and added antifreeze. I'll pickup some of the cooling system lube tomorrow.
 
Thanks guy's...something else scratched of my list.



Best Way to Flush Cooling System?

Posted: 7/31/09 7:22pm Message 7 of 11
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
the cooling sys. lube is good stuff, it comes in about a 1/2 pt. yellow plastic bottle, you might need two, basicly its water soluable oil.


Best Way to Flush Cooling System?

Posted: 8/1/09 7:09pm Message 8 of 11
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
I picked up the lube today on a trip to Wal-Mart...put it in when I got home and I'm all done. Now it's on to the next project.
Thanks



Best Way to Flush Cooling System?

Posted: 8/1/09 7:28pm Message 9 of 11
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sonoma, CA - USA
Joined: 8/9/2002
Posts: 784
Vette(s): 72 LT-1 AC coupe,69 l-36 coupe
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Best Way to Flush Cooling System?

Posted: 8/1/09 7:48pm Message 10 of 11
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Manteca, CA - USA
Joined: 11/20/2005
Posts: 3623
Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
[QUOTE=bio11]I picked up the lube today on a trip to Wal-Mart...put it in when I got home and I'm all done. Now it's on to the next project. Thanks[/QUOTE]
 
Lonnie, shouldn't the next project be a "ROADTRIP" Wink? I always try mine out extensively between jobs to ensure I got it right before proceeding to the next downtime.



in Forum: C3 Cooling and Heating Systems


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