04-23-2005, 07:55 PM
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#106
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AF Enthusiast
Join Date: Mar 2005
Location: Rochester, New York
Posts: 736
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Re: Heater Core Flush?
Will I be at risk for overheating using the Prestone cleaner and water? I drive around 100 miles a day and am a little worried...
Also, is it possible to drain ALL the liquid out of the engine etc? I always have a hell of a time getting the mix correct - since there is some water already in the system...
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04-24-2005, 08:15 AM
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#107
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IT'S GOOD TO BE THE KING!
Join Date: Dec 2004
Location: The Palace
Posts: 5,572
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Re: Re: Heater Core Flush?
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Originally Posted by muzzy1maniac
Will I be at risk for overheating using the Prestone cleaner and water? I drive around 100 miles a day and am a little worried...
Also, is it possible to drain ALL the liquid out of the engine etc? I always have a hell of a time getting the mix correct - since there is some water already in the system...
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As long as your radiator cap is good, you will be fine. Water has a higher boiling point when under pressure. Water boils at 212° F, with the 15psi rad cap the water's boiling point is raised to about 250° F. A 50/50 mix of antifreeze only takes it up to about 264° F.
You can drain almost all the water out using the drain plugs on the block, but it is a pain in the ass. The easiest way to get a true 50/50 mix is to add the required amount of pure antifreeze then top off with distilled water. This is to be done after draining and flushing, so that you know it is pure water already in the block.
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08-25-2005, 11:25 PM
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#108
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AF Newbie
Join Date: Jun 2004
Location: Rochester, New York
Posts: 34
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Re: Heater Core Flush?
hey, i know this thread is 8 months old..if anyone has more input on the dexcool-to-green fluid change lets hear it. someone convinced me to have it done last year, and now it looks like remnants of dex-cool sludge is in the reservoir, and the fluid is brownish in color. you'd all probably agree that when the dex cool was flushed, there was still some left in it when they put the green in. they even sold me on some sort of 'cleaner that is necessary to change to green' for 28 bucks. i'm going to get the whole system flushed out. should I have them put dex cool back in, or just keep the green stuff?? pls help.
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2000 Camaro SS, LS1, Pewter, T-Tops, M6, leather;
1999 Monte Carlo LS, 3.4 L V6, Pewter
1997 Blazer LS, 4.3L Vortec V6, 4WD, Black, BFG All Terrrain TA KO's
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08-26-2005, 12:02 AM
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#109
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AF Newbie
Join Date: Jan 2005
Location: Greensboro, North Carolina
Posts: 48
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Re: Re: Heater Core Flush?
For what it's worth, my mechanic says just keep it green and make life simpler. However, I recall that "Prestone" has a new line that doesn't care what your current color is. You can put it in no matter what you've got in there right now.
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08-29-2005, 12:05 PM
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#110
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AF -Advisor
Join Date: Sep 2003
Location: Sudbury
Posts: 13,568
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Re: Heater Core Flush?
This is why you stick with Dexcool. There is nothing wrong with Dexcool, the problem is the crappy rad cap that everyone should replace.
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08-29-2005, 06:09 PM
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#111
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AF Newbie
Join Date: Jun 2004
Location: Rochester, New York
Posts: 34
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yes, but what's done is done. my question is now what should I do?
__________________
2000 Camaro SS, LS1, Pewter, T-Tops, M6, leather;
1999 Monte Carlo LS, 3.4 L V6, Pewter
1997 Blazer LS, 4.3L Vortec V6, 4WD, Black, BFG All Terrrain TA KO's
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08-29-2005, 06:34 PM
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#112
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AF Enthusiast
Join Date: Dec 2003
Location: Deep Dark Doo-doo
Posts: 977
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Re: Heater Core Flush?
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Originally Posted by BlackBlazOn
yes, but what's done is done. my question is now what should I do?
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You have two choices, you can take it to a reputable garage and pay to have a REVERSE POWER FLUSH done, or you can flush the system yourself using radiator cleaners and a garden house. The best by far is the REVERSE POWER FLUSH. However, if your low on funds, the garden hose my be your only option. I agree with BlazerLT and say to get the system flushed and re-fill with Dexcool and replace the cap. 
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08-29-2005, 11:20 PM
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#113
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AF -Advisor
Join Date: Sep 2003
Location: Sudbury
Posts: 13,568
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Re: Heater Core Flush?
just get it flushed at a shop again and replace the rad cap.
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1995 Factory Blazer Service Manual for sale, PM if interested.
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08-30-2005, 04:50 PM
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#114
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AF Newbie
Join Date: Jun 2004
Location: Rochester, New York
Posts: 34
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will do. thanks guys.
__________________
2000 Camaro SS, LS1, Pewter, T-Tops, M6, leather;
1999 Monte Carlo LS, 3.4 L V6, Pewter
1997 Blazer LS, 4.3L Vortec V6, 4WD, Black, BFG All Terrrain TA KO's
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