Cooling issue - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-24-2003, 04:38 PM   #1
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Default Cooling issue

I am going to open this up for suggestions and opinions, we all know about those

I need to know the correct way to change out my Dex-Kool and flush the cooling system and then refill back with clean Dex-kool. I had it done about a long time ago when the dealer put on a new water pump, but it just looks dirty to me when I take the cap off the radiator. I have added to it, b4 I did the intake job and I mixed the Dex with tap water ( I have a well not city water). Was this ok? Reason I ask is two fold, #1 it just looks dirty and #2 when the car sits for "any" length of time just idling, say you run in to the store and leave it running to keep the family warm, even in 30-40 degree weather it will hit 220? at least whatever temp makes both fans come on. It appears to be in that range on the gauge........I was just thinking a good flush and some new coolant might be helpful....btw I did put a 180 thermostat in when I did the intake a few months back........what do y'all think......

Thanks, DD
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Old 02-24-2003, 05:58 PM   #2
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You might want to schek if your engion fan is commong on
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Old 02-24-2003, 06:32 PM   #3
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sounds like you got a real problem...that heat can really decrease the life of your car down the road. I would get it checked by an expert ASAP
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Old 02-24-2003, 07:54 PM   #4
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Default Dexcool on 92ssei

Can you run dexcool in older cars like 92ssei? Acid base coolant is for late model cars , I think it attacks lead solder in radiators.Does anybody know the pros and cons.
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Old 02-24-2003, 08:01 PM   #5
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Default Re: Dexcool on 92ssei

Quote:
Originally Posted by 666bonne
Can you run dexcool in older cars like 92ssei? Acid base coolant is for late model cars , I think it attacks lead solder in radiators.Does anybody know the pros and cons.
First off you can't run DexCool in an engine that didn't start off with it!Secondly, DexCool Attacking ANYTHING is a MYTH!
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Old 02-24-2003, 08:06 PM   #6
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Default Re: Cooling issue

Quote:
Originally Posted by Dylansdad
I am going to open this up for suggestions and opinions, we all know about those

I need to know the correct way to change out my Dex-Kool and flush the cooling system and then refill back with clean Dex-kool. I had it done about a long time ago when the dealer put on a new water pump, but it just looks dirty to me when I take the cap off the radiator. I have added to it, b4 I did the intake job and I mixed the Dex with tap water ( I have a well not city water). Was this ok? Reason I ask is two fold, #1 it just looks dirty and #2 when the car sits for "any" length of time just idling, say you run in to the store and leave it running to keep the family warm, even in 30-40 degree weather it will hit 220? at least whatever temp makes both fans come on. It appears to be in that range on the gauge........I was just thinking a good flush and some new coolant might be helpful....btw I did put a 180 thermostat in when I did the intake a few months back........what do y'all think......

Thanks, DD
How many miles on the cooling system? DexCool is designed for 5 YEARS! Has anything else been added to the cooling system besides DexCool & Water? What does the DexCool look like? What colour is it? The reason for all these questions will become apparent once answered.
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Old 02-24-2003, 10:18 PM   #7
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Default cooling issue cont.

To answer a few of the questions......I have already checked to make sure that both fans are coming on.......also once you start moving again everything drops back down to regular temp(180).

The car has 150000 on it, runs fine, but has been doing this temp climb for a while. Nothing has been added to the dexcool but well water to the best of my knowledge. As far as the look, it looks like a dirty brown red color when you open the cap.
Now back to the original question.....what is the correct way to flush this system out and now what ??

Thanks......
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Old 02-24-2003, 10:28 PM   #8
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If some one would have ever told me the size and RPM on the stock fan I could get you a faster fan to try to cool it better also you could try to add a tranny cooler
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Old 02-25-2003, 02:17 AM   #9
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Default DEXCOOL

If you change from silicone to dexcool you have to flush real good or it will turn into zello, did the guy flush twice using distilled water? Also when you top off down the road, never just add water or antifreeze, only coolant .It changes the chemistry of the coolant in radiator. when adding make sure it'* the same distilledwater/antifreeze premix . coolant=antifreeze/distilledwater
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Old 02-25-2003, 02:37 AM   #10
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Those are the exact temps my car would operate at. All SSEi'* will top out at about 220 if you let it idle for long enough. Trans cooler, 180 stat, and drill your stat with (4) 1/16th inch holes if you want. This prevents total heat saturation before the stat opens, and keeps temps on a more even average. My car now runs about 185-190 on a 50 degree day, and idle will only peak at about 200 even.
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