- Feb 8, 2012
I recently replaced my Original P/S pump with a Reman unit from AcDelco (3132), the one with the reservoir. Flushed the entire system at the cooling return hose with New fluid (Prestone)... manually primed the pump, and bled/purged the entire system for almost 10 minutes, front on car stands, turned wheel left and then turned right, after fluid level stayed constant, fired'er up and continued the purging process, topped off the fluid level to appropriate level.... took it out for a spin and noticed a hum/whine that is RPM dependent, steering to me seems good.... no whine or sounds when turning and or holding at lock. I've read as much as I could using Google, but haven't found much information that would sound like the problem I may have. All I've read is many people have had trouble with power steering pumps and having to exchange them twice or even 3 times before they luck out and get a good rebuilt unit, I thought I could avoid all that by buying an AcDelco, but well here I am.... I already made sure it was the P/S pump using a stethoscope that is causing this sound as the sound is present when you first start'er up in the morning or after a few hour nap... btw, I used the proper tools to remove and to install the pulley... anyone out there have a similar issue? Another thing, the sound seems to appear around 1500 rpm and continue, changing in tone as the engine revs... Tonight I bought a bottle of Lubegard, hoping it will take care of this nuisance...