Flush Power Steering Fluid - MKII - How To - MR2 Owners Club Message Board
 
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post #1 of 6 (permalink) Old September 30th, 2017, 16:01 Thread Starter
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Flush Power Steering Fluid - MKII - How To

I've been having some PS issues of late, the PS pump seems to quit after a minute or two for some reason. So today I decided to replace my 23-year old PS fluid on my 1994 US MR2 MKII Turbo. Here's what I did.

There may be other or better ways to do this but this is what I did. Feel free to add your tips or other suggestions if there are improvements or short-cuts.

First, the parts I used;
1- A hand-held vacuum pump
2- RAVENOL J1B1022 Electro-Hydraulic Power Steering Fluid - E-PSF Full Synthetic 1-liter.

Both the pump and the Ravenol are widely available from Amazon and other friendly MR2 suppliers. These little pumps are handy for jobs like this and for bleeding brakes. Also, you don't need 1 liter of PS fluid, you only need about 200ml, so get a smaller bottle if you don't want to spend as much.




The vacuum pump makes this all pretty easy. I just used the little tip on the end of the hose, then put the hose into the PS reservoir, and then just pump. The pump sucks the old PS fluid out into the attached plastic container. In all I pulled out about 200ml of old PS fluid. Using a flash light I could see the reservoir was empty.

You can see the color of the old PS fluid that came out, it was dark like Coca Cola, only thicker.



I then put in the Ravenol fluid and filled it to the top of the "cold" indicator on the cap-stick. The Ravenol is very light and clear, almost like water. Comparing the two fluids it looks like the old PS fluid is a little thicker than the Ravenol, but that is likely because of 23 years of use.

I put some Ravenol in the plastic container to show the difference in color. The old fluid is in the water bottle next to it.



Once filled, I then started the car, and turned the steering wheel lock to lock, holding for 3 seconds at each end. Do that a few times, and then check the fluid level. When I checked it was about half-way up the "Hot" indicator. That is it.

Unfortunately, the pump still quits after a couple of minutes, but I feel better having fresh PS fluid.

Last edited by sflmr2; September 30th, 2017 at 16:17.
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post #2 of 6 (permalink) Old September 30th, 2017, 21:43
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Well done! How many miles on that fluid out of curiosity?
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post #3 of 6 (permalink) Old September 30th, 2017, 23:51 Thread Starter
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Well done! How many miles on that fluid out of curiosity?
74,500 miles.
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post #4 of 6 (permalink) Old October 1st, 2017, 08:17
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Originally Posted by sflmr2 View Post
Unfortunately, the pump still quits after a couple of minutes, but I feel better having fresh PS fluid.

I had your same issue a few years back. The power steering was intermittent. It turned out to be a bad ground. I just cleaned up the connection and it worked fine. I can't remember he details, but I learned about it by searching the MR2OC forum. Apparently, it is a common problem with the electric assist.



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post #5 of 6 (permalink) Old October 6th, 2017, 10:45 Thread Starter
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Thanks Dr. Pete. I tried the search feature and looked for about 25 minutes but either I'm lousy at searching, or it's not easy to find. If you have any pointers or suggestions about how to attack this problem with EHPS cutting out after a couple of minutes I would greatly appreciate it.
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post #6 of 6 (permalink) Old May 19th, 2019, 22:21
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My 94 has original fluid
45k miles

Will change it
Thanks
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