I do not see a lot of benefit to flushing. The main reason for changing the coolant is to ensure that you have plenty of corrosion inhibitor. The main problem with stinky's method is that you will have some plain tap water left in your system. I think it is very important to only use distilled water. That is why Honda only sells premix coolant. It is because bad water can cause a lot of problems in your coolant system. Most of the build of of stuff in the radiator is due to mineral deposites from the water. Here is what I do:
Drain and refil with distilled water. Bring car up to operating temp, turn on heater. Drain system again. Fill system with enough coolant to equal 50% of your system capacity. Top up with distilled water.
Your tap water might not be too bad, but it will have some minerals that are bad. Distilled water is better and not too expensive.
Oh, it is really bad to put any antifreeze down the storm drain. Even the flush water. Recycle or put the stuff down the drain in your house. The city water treatment system can handle the small amounts of glycol that they get from homeowners.
Drain and refil with distilled water. Bring car up to operating temp, turn on heater. Drain system again. Fill system with enough coolant to equal 50% of your system capacity. Top up with distilled water.
Your tap water might not be too bad, but it will have some minerals that are bad. Distilled water is better and not too expensive.
Oh, it is really bad to put any antifreeze down the storm drain. Even the flush water. Recycle or put the stuff down the drain in your house. The city water treatment system can handle the small amounts of glycol that they get from homeowners.
