What is the method for bleeding power steering fluid?
2 Answers
When replacing the power steering fluid, first start the car and use a fluid extractor to completely remove the old fluid. Then, turn the steering wheel back and forth to allow the new fluid to penetrate, which also helps with cleaning. For thorough penetration, it's best to turn the steering wheel sharply from left to right. Next, extract the fluid from the power steering reservoir again, then refill it with new power steering fluid. After that, turn the steering wheel once more. The purpose of this repeated operation is to ensure that the old fluid is completely removed. Then, fill with new fluid. Experts remind that no fluids should be mixed. You may hear a slight "whooshing" sound, but don't worry—this is the fluid circulating, and the sound will gradually fade away.
I've driven for many years and encountered situations where power steering fluid needed to have air bled out quite often. The usual method is to start the engine first and let it idle for a minute or two. Then turn the steering wheel fully left and right several times, about three to five cycles. This forces the air bubbles out. During the operation, you must check the fluid level in the reservoir, keeping it between the minimum and maximum marks - add standard-grade fluid if it's low. I always do this on level ground like in a garage to avoid any risk of vehicle movement. When there's too much air, the steering becomes noticeably heavier and may produce squeaking sounds - addressing it early is much safer. Incidentally, air usually enters the system due to low fluid levels or worn seals, so I change the fluid regularly to minimize this. After completing the procedure, the steering wheel becomes much lighter, immediately improving the driving experience.
