Postby smj999smj » Mon Aug 20, 2018 11:28 pm
Drain and fill takes two gallons of coolant. 2006 would have Nissan "green" coolant, which is the same as Pentosin Pentafrost A2 anti-freeze, from the factory. I prefer to use the Pentafrost A2 or genuine Nissan coolant, but Prestone or SuperTech "universal color" anti-freeze and similar coolants will work, as well. The coolant should be HOAT (Hybrid Organic Acid Technology). FYI, the Pentosin anti-freeze can be found at Autozone and many other parts stores, as well as from Rockauto. It is a concentrate and should be mixed with a gallon of distilled water.
De-pressurize the system and remove the radiator drain plug with a large, flat-blade screwdriver. Pay attention to the gasket, which may come out with the drain plug or stay inside the recess for the drain plug. Just make sure it's on the drain plug before you install it! Remove the radiator and reservoir caps and don't mix them up! The radiator cap will NOT have a spring on the underside and the reservoir cap, which is the pressure cap of the system, will have the spring on the bottom of the cap.
When you complete draining the system, re-install the drain plug into the radiator bottom tank. If you have one, install a Spill-free funnel on the radiator. Pour the coolant into the radiator. If it's pre-mixed, you needn't do anything to it. If you are using concentrated anti-freeze, you can pre-mix the two before installing it. For me, I pour a half gallon of distilled water in followed by a half gallon of the coolant. Then I pour the rest of the water followed by the rest of the coolant. When the radiator is full, install the cap and continue filling the reservoir. If the reservoir reaches the "MAX" line before you run out of coolant, you can let it settle for a few minutes and then pour the rest in if the level has dropped, or, if the level doesn't drop, put the rest on the side and save in case you need to top off the system, later. Every time I've done this, I always used exactly two gallons. When finished, install the cap on the reservoir.
Jack the front of the vehicle up as much as safely possible, or park "nose up" on a steep hill or incline (or car ramps). Start the engine and turn on the front and rear heaters, setting to the hottest temperature setting. Run the engine at 2000-3000 RPM for around ten minutes. Check and see if the air from the heater vents is hot (usually they blow around 140 degrees F. when the heater is operating properly). If it's not hot enough, continue running the engine until the output temperature is good. When the temperature is good, lower the vehicle, if necessary, and shut off. When it cools off, top off the coolant in the reservoir as necessary.