I’ve used a syphoning method to change the ps fluid. I really want a more complete method for this. Watching some yt videos it seems there are some similarities among power steering systems. One, the return path appears to be low pressure. Two, if this return connection is separated it seems possible to either pump or drain fluid continuously thereby replacing old w new fluid. Do people do this more complete fluid exchange or is the trouble not worth it? The baster or syphon method enables old fluid to be removed and new fluid added. Is this similar to changing transmission fluid in that each drain and fill one could assume that each time about 1/2 the total of fluid is replaced? Does the ps system circulate enough to keep sediment from building in the lowest points of ps system?
John F
2005 Impala Base (KIA), 2008 Impala LT (KIA) 2002 Chevrolet TrailBlazer LTZ 4.2L
Joined
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852 Posts
When I did mine, I first jacked up the front end to get the wheels off the ground. I removed the low pressure line from the reservoir and capped the nipple. I used a barbed union to attach the low pressure line to a length of 3/8" OD clear hose and put the other end in a drain pan.
I opened the reservoir cap and started to turn the wheel lock to lock. After 2 or 3 of these, I topped the reservoir with new fluid. I used Lubegard 23232 Power Steering Fluid. The benefit to this is it's clear in color and I was able to visually see the change. Repeated the lock to lock turning and topping off several times until the fluid ran out clean.
Reinstalled the low pressure line, topped off to the cold line, lowered the vehicle and went a few laps around the block, alternating lefts and rights. Topped off as needed (which wasn't much at all) and never had an issue since. 2 quarts was more than enough for a flush and to have some left if needed.
Didn't have to start the vehicle once during the process and the only spill was some dripping when removing and replacing the low pressure line.
Did the same procedure again a few weekends ago on my 2002 Trailblazer with the same results.
I opened the reservoir cap and started to turn the wheel lock to lock. After 2 or 3 of these, I topped the reservoir with new fluid. I used Lubegard 23232 Power Steering Fluid. The benefit to this is it's clear in color and I was able to visually see the change. Repeated the lock to lock turning and topping off several times until the fluid ran out clean.
Reinstalled the low pressure line, topped off to the cold line, lowered the vehicle and went a few laps around the block, alternating lefts and rights. Topped off as needed (which wasn't much at all) and never had an issue since. 2 quarts was more than enough for a flush and to have some left if needed.
Didn't have to start the vehicle once during the process and the only spill was some dripping when removing and replacing the low pressure line.
Did the same procedure again a few weekends ago on my 2002 Trailblazer with the same results.
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