Question about 1997 Oldsmobile Cutlass Supreme

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Getting hot how do i flush the raditor

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This is kind of an old post but maybe someone else might read it and get the information. There are several things to get ready first and have with you. Newspapers/rags I use a disposable hard tinfoil turkey pan to catch the old fluid but whatever you may have that has some capacity for the fluid is great. You want to try and do this in an area that will have the least amount of impact on animals because anti-freeze is poisonous. Try to have some old jugs or something similar to pour all this in and dispose of it properly. What I purchased....2 jugs of antifreeze, 1 can of Prestone super flush and 1 tube of radiator stop leak (powder). What you want to do is first drain out the old fluid. Open the hood or get under the car if you have ramps or a way to lift it (this would be highly recommended and reallly a necessity even if you just jack up the side that the radiator is on. Anyway you should have an upper radiator hose and a lower radiator hose. There are other ways of doing this entire procedure but this is the one that works for me. Placing the pan below the lower radiator hose, I had a clamp on mine that I used long needle nose on to loosen and let all the old fluid drain in the pan. Once the fluid was out I put the hose back on and tightened it down. Also when draining all this be careful because later the fluid will be scalding. Wear long sleeves and long yellow gloves. Have a water hose or several jugs of water ready and start the car (always have the car running when adding to the radiator so that you do not crack the head on the motor). Start the car and first add the Prestone super flush and then fill it all the way up with water. When it begins bubbling up bad, put the top on the radiator and turn the heat on inside your car full blast. This will allow it to circulate through the entire system. Let it cycle for 20 minutes and then turn the car off. Remove the lower radiator hose, making sure to not to scald yourself, and when everything has drained out start the car again and using either the water hose, or jugs of water keep adding through a funnel for a few minutes 2-3 minutes. Let all this drain out, and after 2-3 minutes, turn the car off. Re-connect the radiator hose and then add the radiator stop leak powder. Start the car and add the anti-freeze. Beforehand depending on the climate it should be 60/40 antifreeze/water ratio but it does depend on the climate, ask around....keep adding the ant-freeze-water ratio until it bubbles up bad. Replace the radiator cap, and later when the car has cooled off you can add more, or maybe add more through the plastic radiator overfill jug. I have done this on several vehicles and never had another minutes problem out of them. I try to do this right at about 50k 100k etc....Hope this helps someone.

Posted on Feb 23, 2009

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