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06-10-2007, 05:41 PM
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#1
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Join Date: Apr 2005
Posts: 2,308
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LS1 cooling system
My car is 5 years old now and the manual says the coolant should be changed every 5 years or 150,000 miles whichever comes first. Is that gospel, or could I let go a little a longer? My car has 32,000 miles on it right now.
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John
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06-10-2007, 09:59 PM
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#2
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Stalker
Join Date: Aug 2004
Posts: 12,083
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Id say do it. it cant hurt, ive seen on ls1tech the guys say its good if maintained properly. my car had 64k, and i had to change it when i did the new motor. It was horrible looking. i cant stand dex-cool. i drained everything except the heater core and put it the prestone green "any make any color" stuff.
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06-10-2007, 10:31 PM
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#3
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Join Date: Apr 2005
Posts: 2,308
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Quote:
Originally Posted by SmokingSS
Id say do it. it cant hurt, ive seen on ls1tech the guys say its good if maintained properly. my car had 64k, and i had to change it when i did the new motor. It was horrible looking. i cant stand dex-cool. i drained everything except the heater core and put it the prestone green "any make any color" stuff.
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How did it go when you backflushed it? Is there a good kit for the LS1 or will any do?
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John
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06-10-2007, 10:47 PM
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#4
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Stalker
Join Date: Aug 2004
Posts: 12,083
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i didnt have to really flush anything in my case. im not sure how others do it, im sure they explain it on ls1tech, i just hate that site because everyone thinks they know better.
I had a new brand motor, all new hoses and i flushed the rad with a hose while it was out of the car. once everything was dry again and clean, then it got reinstalled. I even removed and flushed my overflow tank and got a ton of sludge junk out of it. Also when i filled it, i did an exact 50/50 mix of coolant and distilled water.
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06-11-2007, 07:58 AM
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#5
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Join Date: Apr 2005
Posts: 2,308
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I have the service manual...it gives the steps for draining the system, but when it comes to flushing it just says to buy a kit and follow its instructions...so I'm guessing it's just like any other motor.
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John
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06-11-2007, 10:47 AM
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#6
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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If you have Dex-Cool and it has even a hint of brown in it, flush it now and replace it with Peak Global.
In my GTP I had 'jerky' build up from dex cool- and by that I mean I had congealed pieces of dex cool in my system that came out like strips of beef jerky.
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06-11-2007, 11:27 AM
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#7
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Join Date: Apr 2005
Posts: 2,308
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Yeah, I had gunk like that in my '97 Sunfire. I never buy Dex-Cool, just something that says it meets spec of GM engines with Dex-Cool.
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John
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06-11-2007, 01:56 PM
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#8
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,170
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When i fill systems, i mix a/f with distilled water - supposed to be better then tap water (minerals and such , IIRC)
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Last edited by BonzoHansen; 06-11-2007 at 07:54 PM.
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06-11-2007, 06:10 PM
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#9
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,695
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Quote:
Originally Posted by BonzoHansen
When i fill systems, i mix a/f with distilled water - supposed to be better then tap mater (minerals and such , IIRC)
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less corosive as well... i did mine around 40k to be on the safe side. i'm gonna have to do it again since my radiator is out and i will be using prestone green again
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Quote:
Originally Posted by LS1ow
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