Originally Posted by LarryBible

I'm sorry, but Oliviers method will require a TON of fluid and will never really get the system clean.

I call the following method the ASE method because it is the method around which questions on the ASE test are asked. You will need five fresh quarts of power steering fluid, a drain pan, a way to suck out the old fluid from the reservoir and enough tools to disconnect and replace the power steering return line from the reservoir. The steps are as follows:

o Remove the reservoir cap and suck the fluid out of the reservoir.
o Disconnect the return line from the reservoir and lower it into a drain pan below.
o Open three quarts of fluid and have them ready to pour in and fill the reservoir.
o Instruct an assistant that when they start the engine they should start turning the wheel back and forth lock to lock while watching for the signal to kill the engine.
o Once the engine is started, begin with the fresh fluid and keep the reservoir from going empty until all three quarts have been poured through and the reservoir is empty. At that point signal the assistant to kill the engine.
o Reconnect the return line and fill the reservoir, then signal the assistant to restart the engine and start turning lock to lock again while you fill the system until it will take no more fluid.
o Replace the reservoir cap and dispose of the fluid in the drain pan.

DO NOT USE ANY SOLVENTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! USE ONLY CLEAN P/S FLUID FOR THE FLUSHING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1


And that's all there is to it. It doesn't take very long at all to do this and as a result you will have a completely clean P/S system. If you are doing this on an MB, it would be a great time to change the filter at the bottom of the reservoir. Many other brand cars don't have a filter though.

Good luck,