I've been doing a drain and fill of the PS fluid and coolant on my 2007 V6 6 speed Accord Coupe every three years when I replace the brake fluid. I have a vacuum fluid extractor that I use to thoroughly bleed the brake system, but for the power steering, I just use the extractor to empty the reservoir and fill it back up with about 10oz of fresh fluid. Takes less than five minutes. After 13 years the fluid that comes out looks nice and clean. Pump is quiet and no leaks. For the coolant, I open the radiator drain cock and extract the coolant out of the overflow tank and then refill. I also drain and fill my wife's Acura Wagon automatic transmission every fourth oil change which takes three quarts. Her PS is electric.
I know draining and filling leaves much of the old fluid in the system, but it is just so easy to do a drain and fill when I'm set up to do other routine maintenance. With brakes, I'm concerned about flushing the old fluid that's been sitting in the calipers. With the transmission, power steering and coolant, I figure the pump mixes up the old and new fluid pretty quickly.
I know draining and filling leaves much of the old fluid in the system, but it is just so easy to do a drain and fill when I'm set up to do other routine maintenance. With brakes, I'm concerned about flushing the old fluid that's been sitting in the calipers. With the transmission, power steering and coolant, I figure the pump mixes up the old and new fluid pretty quickly.
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