Engine Cooling

Coolant Replacement

Here's the procedure I used to drain the old coolant and add the new mixture:
First, I bring the car up to operating temperature (when the fan(s) kick in) so that the thermostat is in the open position. Next I set the cabin heater/ac to its highest temperature setting. Once the engine is fully warmed up, I shut it down. I jack up the car on both sides and put it on stands. Next, open the radiator drain and catch the old fluid. Use a large open container, as there are over four gallons of coolant/water in the system. As the old fluid starts to come out, remove the overflow reservoir cap (careful, it's hot). Once all the fluid is drained from the radiator, close its drain plug. Slide the catch container under the left rear bank of the engine directly below the left side engine coolant drain. Remove the drain plug. Replace the copper crush ring with a new one. Once it stops draining, replace the plug. Repeat the last four steps for the other side of the engine. You should have about four gallons in the catch tray. Make sure all drains are closed, and begin adding the coolant/water mixture into the overflow reservoir. This may be a long and slow process, as you may have to "burb" the hoses to let trapped air out. Once you have added about half or more of the mixture, start the car and continue adding to maintain a proper level in the reservoir. Watch the temp gauge for signs of overheating.

I hope this helps. Merry motoring. Ed Ruiz