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Message: <blockquote data-quote="cobrajeff96" data-source="post: 1530989" data-attributes="member: 29141">By removing the coolant hose from the oil/water plate along the driver side front of the motor, that should do a pretty good job of draining the block. Run some distilled water through one of the heater hose ports and let it drain out of the afore-mentioned open port at the bottom to run out any scale that might be in there. Basically whatever the lowest point in the system is (I'm pretty sure the 4v motors have the thermostat housing as the lowest point, not sure about the 2v or pushrods).Probably best to stay with the stock thermo temp rating, unless you're going hardcore with the car often. Then you'd go slightly colder.A 50/50 mix is pretty normal and is what most cars on the road will use, no matter the climate. If the car will never see a sub-zero (sub-32*F) winter, yea run straight distilled water and a bottle or two of water wetter and it's done. But you'll most likely want a least a little anti-freeze because of the detergents and scale-reducers and they do help with boiling points to a small degree.The OEM fan moves more than enough air, stay OEM as long as possible.</blockquote>