IBuiltMine-o1oo Posted March 18, 2008 Report Share Posted March 18, 2008 I want to know how to flush the motor and radiator to be sure that ALL the orage stuff is out...... Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted March 18, 2008 Report Share Posted March 18, 2008 Any flush should take all of it out.... I would just take it to a shop. They have a machine that will suck all the Dex-cool out and replace it with a machine filled with the green stuff. Quote Link to comment Share on other sites More sharing options...
GP1138 Posted March 18, 2008 Report Share Posted March 18, 2008 Dex-Cool isn't really that bad as long as you make sure it's clean and changed at regular (read: not factory) intervals. The problem comes with mixing it with green or other coolant, and letting it just rot for 100k. I'd just flush the system and refill. Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted March 18, 2008 Report Share Posted March 18, 2008 Dex-Cool isn't really that bad as long as you make sure it's clean and changed at regular (read: not factory) intervals. The problem comes with mixing it with green or other coolant, and letting it just rot for 100k. I'd just flush the system and refill. QFT! Quote Link to comment Share on other sites More sharing options...
ismellrealbad Posted March 18, 2008 Report Share Posted March 18, 2008 I was actually told that they can be mixed just fine. Just that all your doings is reducing the "extended" life of the dex cool to the life of green. I dont know if this is actually true or not. No matter what color your coolant is id never let it go more than a year w/o a change. Oh and and I do NOT like those coolant flushing machines. I do not like that the motor is running at operating temp for a moment with NO coolant in there. Just flush the regular way by hand. Quote Link to comment Share on other sites More sharing options...
Crazy K Posted March 18, 2008 Report Share Posted March 18, 2008 open the draincock on the radiator. sometimes if it is the first time I have to use a pair of pliers. I will use dielectric grase on the drain plug (assuming you remove it from the radiator) to make sure it does not freeze up again. Start with the car cold. drain radiator. refill with tap water. disconnect the upper hose and let that spew... which means coolant leaving the engine does not recycle. start motor. add water to keep the radiator topped off. you may use a hose or bucket brigade etc etc etc. eventually the water leaving the engine will be clean pure water. stop engine. allow to cool. drain radiator. close radiator spout. fill with pure antifreeze. start motor. add remainder of 1st bottle of antifreeze and start on a second if needed. run until the upper hose starts spewing green. shut off motor. reconnect upper hose. restart engine. add some distilled water and remainder of 2 gallon of antifreeze. use a gauge to determine antifreeze percentage and add more coolant or water as needed. I usually add 1 gallon of distilled and 2 of PURE antifreeze. If I can... I will run a car with a hose overflowing the radiator. I Quote Link to comment Share on other sites More sharing options...
BIGBULS Posted March 19, 2008 Report Share Posted March 19, 2008 I was actually told that they can be mixed just fine. Just that all your doings is reducing the "extended" life of the dex cool to the life of green. I dont know if this is actually true or not. No matter what color your coolant is id never let it go more than a year w/o a change. Oh and and I do NOT like those coolant flushing machines. I do not like that the motor is running at operating temp for a moment with NO coolant in there. Just flush the regular way by hand. Um.............that's NOT how coolant flush machines work. Basically, when the thermostat opens, the old coolant goes into a bucket, and as soon as that happens there pressure change is noted and the flush machine immediately starts pumping in new coolant. So yeah.............NEVER is it run low. Oh, and while green coolant and Dexcool WILL mix just fine, you DO lose any and all extended life benefits.............but much WORSE than that, you WILL be replacing your water pump every two years or so. The anti-corrosion silicates in conventional coolant chew up the new water pump inards (this is usually the first weak link in the system that starts to leak)..............the OAT stuff in Dexcool does NOT. So yeah.............if it came with Dexcool, put Dexcool back in..........it'll save you $$ in the long-term. And trust me, I see 30+ cars a day, two thirds of which are GM's.............Dexcool is NOT the problem and works JUST fine (even given 5 year intervals). Quote Link to comment Share on other sites More sharing options...
ismellrealbad Posted March 19, 2008 Report Share Posted March 19, 2008 Not every machine is the same. This one uses shop air to suck everything dry and create a vaccuum, collapsing the hoses onces its done. Then you switch it over to pump fresh coolant in once its empty. I'm sorry but thats how it worked and its shitty. I didnt design it. We had the same one when I worked at ford and chrysler. I agree, stick with whatever was in the car originally. No need to change it over Quote Link to comment Share on other sites More sharing options...
BIGBULS Posted March 19, 2008 Report Share Posted March 19, 2008 That IS a shitty design. We have a Wynns machine that is sold in a GM catalog..........it works as I noted. Plus, AFAIK, *most* flush machines are line this........... Quote Link to comment Share on other sites More sharing options...
ismellrealbad Posted March 19, 2008 Report Share Posted March 19, 2008 It looked like one of these bitches It had a rubber cone at the end for using with expansion tanks which split into 2 hoses, send and return, and 2 valves to control each (similar setup to acetylene torch) Quote Link to comment Share on other sites More sharing options...
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