JaredL

1985 4runner 22re. My middle power steering pump hose was cracked at the rubber portion so I discarded and bought a Duralast shorter hose from Autozone considering Toyota doesn't sell the original hoses anymore. There isn't much of a difference between the 2 hoses...the Toyota one was longer and had a weird metal bend in it that the Duralast does not have.

Not sure if that is contributing to my issue but ever since draining the fluid, replacing the hose, and filling back up with Dextron III ATF (I can't find Dextron II), there is a noticeable whine coming from the pump. I checked the fluid level and that looks good....no bubbles only a steady flow in the reservoir.

I read on this site that some folks have had success mixing (or completely using) hydraulic fluid to cure PS pump whine. Thoughts on this?


Thanks,
JARED

dropzone

iTrader: (6)

sounds like you may have some air still in the line and it is cavitating

JaredL

Thanks. I ended up taking out the reservoir, cleaning it out thoroughly, and refilling with Dextron III Valvoline High Mileage. Just like before, I jacked up the front of the 4runner and turned the steering wheel back and forth while filling it. There were no bubbles that I could see. The whine is still there (not while jacked up but put back on the ground) but it doesn't seem as loud. So, I will drive it around a bit and report back as progress is made.

Thanks!

Terrys87

iTrader: (1)

With the wheels off of the ground it can take quite a few times to get the air out. I have not heard of adding hydraulic fluid to stop whining. I have used a tablespoon or two of brake fluid for softening up seals and stopping minor leaks.

JaredL

Thanks everyone for your help. Following your advice and other posts I took out the reservoir and thoroughly cleaned it and the inside screen. I lifted the front end and refilled with Dexron III Valvoline all while moving the tires back and forth. Like last time, I didn't notice any bubbles but unlike last time, this combination of actions seemed to do the trick. The sound is dramatically decreased and the steering seems to be much easier.


Thanks,
JARED

Terrys87

iTrader: (1)

Great to hear you got it fixed.