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#32
01-27-2005, 12:46 AM
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Re: Re: Hello All, a newbe here
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If you do this in most places in both Canada and the U.S. you'll have some really pissed off people telling you to put it back on your truck 
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#33
01-27-2005, 06:19 AM
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Hello All, a newbe here
Actually most cars are more fuel effecient than they ever have been. I dont think there going out of there way to make us burn more fuel or rob us of performance. In some cases who ever said it is right also. Being a mechanic you see a lot of stupid designs. If you noticed they have changed the dex cool system quite a bit since they first put it into our cars. The pressure cap has now been taken off the radaitor and now they put them on the reserve tank. I have never seen a problem with dex-cool in this design. no sludging up or anything. Because they do not loose the pressure. Get a new 16psi rad cap. Im done arguing about this. You do it your way and ill do it mine.
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#34
01-27-2005, 07:46 AM
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Re: Hello All, a newbe here
Its not easy being green. The dex/green argument aside, how would you all recommend back flushing a cooling system? I have never done it to my truck with 139,000 miles so figure it couldn't hurt. Thanks everyone.
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#35
01-27-2005, 12:43 PM
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Re: Re: Re: Hello All, a newbe here
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Also, people love to give you 5000 dollar charges when they catch you.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#36
01-27-2005, 08:19 PM
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Re: Re: Hello All, a newbe here
O rileys has a chemical you put in your radaitor called Prestone Cooling system flush. Its pretty cool to see all the crap come of your radiator after you run it with that in there. Heres what i did.
Warmed the truck up Drained the radiator Poured the flush bottle in the radaitor and filt it up with water. Ran the truck for 15 min with the heater on full blast. Then drained the radaitor again. Then took a garden hose and poured water in the radiator as it was running that way it would flush everything out of the block and heater core that didnt come out when you drained it until water continued to come out of the drain. The heater core and block together hold approx 1/2 to 3/4 of a gallon. so i mixed my mixture 70% antifreeze, 30% water to compensate for the water. Run the engine for a little while then test the antifreeze with a hydrometer after a few days to make sure your mixture is cool. Make sure you get a new rad cap. have fun though. On the 2.2 radaitor drain is under the airfilter housing. Accessable from up top. most of them at least. the 4.3 is on the passenger side accessable from under the car. Have fun.
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#37
01-28-2005, 06:13 AM
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Re: Hello All, a newbe here
xtrememeasures10: What you described is a regular flush, I was wondering what a BACK flush is. I have flushed the radiator before as you explained but always wondered how the pieces can get out of the radiator from the little drain hole. Should I be disconnecting the bottom radiator hose? BTW, make sure you let your truck cool down before draining coolant from it, you can crack or warp the block/heads/intake manifold if drained hot.
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#38
01-28-2005, 12:37 PM
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Re: Hello All, a newbe here
draining it hot shouldnt be a problem, its refilling it with the cold water thats bad
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#39
01-28-2005, 01:16 PM
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Re: Re: Hello All, a newbe here
Yeah i forgot to mention letting it cool a little bit. not too much tho.
No dude if you turn your heater on full blast with a new rad cap on there. Your going to be flushing it with 16lbs of pressure. That will be sufficent enough to unclog your heater core. it unclogged mine. And as far as pouring cold water in your warm radaitor i dont know it worked fine when i did it. I guess if your worried let the car cool off. or use hot water.
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