: New noise this morning

05-05-10, 09:42 AM
On my way to work this morning I heard a loud whining sort of noise from the front while making a right at a stop sign. I thought it was tire rubbing at first but it was doing it at a stop when turning the wheel. It seemed to get a lot quieter as it warmed up. Is this a power steering pump issue? Thoughts?

05-05-10, 09:53 AM
sounds like it

05-05-10, 10:31 AM
So, how's the color of the fluid looking?

05-05-10, 11:03 AM
So, how's the color of the fluid looking?

I'll check at lunch. Is this curable by fluid change you think?

05-05-10, 11:05 AM
This happened to me. It turned out to be the power steering fluid.

05-05-10, 04:21 PM
Well since the labels under the hood assume the average cadillac buyer is illiterate I have to presume that the vaguely steering wheel looking emblem with a squiggly line underneath denotes the power steering fluid resevior. I see fluid, and it's very dark. The noise seems to have totally disappeared though. How do I drain the fluid?

05-06-10, 04:16 AM
All credit goes to Darkman for these good instructions:

This is the procedure in the Service Manual:

1. Turn off engine.
2. Raise the front wheels off the ground so that the front wheels turn freely.
3. Place a large container under the fluid return hose in order to collect fluid.
4. Remove the fluid return hose at the power steering pump reservoir.
5. Plug the reservoir return hose inlet connection on the power steering pump.
This procedure may require 4 quarts of power steering fluid until the draining fluid appears clear.
Do not run the engine without the power steering fluid level at FULL COLD.
6. Run the engine at idle while an assistant maintains the fluid level at FULL COLD in the reservoir using new approved power steering fluid.
7. Turn off engine.
8. Turn the steering wheel fully to the left and right.
9. Remove the plug from the pump reservoir inlet connection.
10. Install the fluid return hose to the pump reservoir.
11. Maintain the fluid at FULL COLD.
12. Operate the engine at idle approximately 15 minutes.
13. Repeat Steps 3-5.
14. Inspect the power steering fluid for the following indications of contamination:
a. Milky Fluid water
b. Brown Fluid burnt
c. Plastic debris or dirt chunks.
15. Remove the plug from the pump reservoir inlet connection.
16. Remove the plug from the pump reservoir inlet connection.
17. Clean any spilled fluid.
18. Bleed the power steering system.

Another procedure is to:

1. Jack up the car.
2. Remove the apron pins and apron underneath the front bumper/radiator.
3. Remove the bolts holding the PS cooler and let the cooler drop.
4. With a catch pan in place - remove one of the cooler hoses and drain.
5. Reattach the hose.
6. Top off the reservoir with fluid and run the engine 2-3 minutes making sure the reservoir is full.
7. Repeat Steps 4-6 until you are draining clear fluid. (The OEM fluid is crystal clear-some other brands may be red like ATF).
8. Reassemble everything.
9. Recheck the reservoir periodically in case you had an air bubble.

06-04-10, 03:43 PM
Whoa! Thanks for the write up guys! I ended up getting it inspected and had him check the steering fluid, if he flushed it he didn't charge me for it, all I know is it hasn't made a sound since. This is a shop owned by a close friend's father who I recently bought several cars from, so it could have been a freebie.

06-04-10, 04:49 PM
Thanks for the instructions, I've been meaning to do this, as my power steering fluid is a gross brown color. Is there anyway that a power bleeder could be used to make this a one person operation?

I don't have one yet, but was planning on buying a Motive power bleeder to do the brake and clutch lines.