|Topic Review (Newest First)|
|08-14-2020 06:18 AM|
Yeah, the hardest part of the process on the Hemi is getting the old pulley off without breaking it, and then getting it lined back up with the other pulleys on the engine.
(I say "hardest" part, but it's really just time consuming)
|08-11-2020 01:38 AM|
Nice write up! Looks easy to get that PS pump out compared to what you have to do to the CRDs.
There is a trick I’ve used: when pulling the vacuum on the reservoir I’ve turned the wheels to both sides about ten times. That did get all the air out of my system.
|08-10-2020 08:25 AM|
Update on this problem...
I went ahead and replaced the PS pump this weekend. So far, it seems to be the cure!
I wrote about the process in my other thread for those that come down this road later.
See this thread, post #82
|08-07-2020 08:53 AM|
Originally Posted by RCS1300 View Post
Yes, the whine does increase with steering input, but again, only when the fan is engaged. When not engaged, there is no whine present, even with steering input.
|08-07-2020 07:51 AM|
|RCS1300||A power steering whine usually happens when you are turning the vehicle and putting stress on the power steering system. I would take a look at your serpentine belt and the belt tension unit. Take the belt off and examine it for cracks and wear. By hand, roll all of the pulleys that the belt contacts and check the bearings for looseness or binding, check your belt tension unit spring action and pulleys. Did you replace any of your equipment that involves the serpentine belt like the alternator, water pump, compressor, etc. If so, one of them may be out of alignment.|
|08-07-2020 06:13 AM|
Originally Posted by NevadaWheeler View Post
So in your thinking it's still a pump issue, maybe the pump isn't completely done yet, but the added stress of turning the fan is highlighting its impending doom? Sounds plausible.
|08-06-2020 08:24 PM|
|NevadaWheeler||It sounds like your pump is going out to me. When you changed out the hydraulic fluid, did you use MS-10838 spec fluid, assuming that is what your WK requires? I believe all WKs with the hydraulic fan require it, but I'm not certain.|
|08-06-2020 10:04 AM|
Hydraulic fan power steering whine but not constant
So, I've got the dreaded power steering whine coming on, but it's not low fluid and it's not constant. I've done some research here to see if there's been a case of this symptom before, but couldn't find anything exactly like mine.
Here's the story...
3 days ago, I heard a whine while driving down the highway, it only lasted for about 20 seconds, then went away. I checked the hydraulic fluid level when I got home and it was fine, actually it was slightly high (hot).
Over the next few days, the whine has happened more often. When it happens, it will whine sitting at idle at stop lights, parking lots, or while driving down the road. As before, it lasts only for a short time, then goes away. Steering effort is also increased during the whining condition.
I eventually started to notice that the whine only happened when I could hear that my engine fan was engaged. After getting home last night and parked in the driveway, I confirmed this. Engine at idle and the whine is not present until the engine fan starts to engage and picks up speed. Then the whine is really loud. Once the fans starts to shut down, the whine goes away.
My thinking initially was that the fluid was low and that the fan was drawing enough fluid to cause the whine in the power steering pump. But after checking, double-checking, and even adding a little more fluid to the system, there has been no change. Only change has been that it is happening a little more often now. The whine is definitely coming from the pump and not the fan. But it is definitely only coming from the pump when the fan is running. When the fan stops, the whine goes away.
To my knowledge, this is the original power steering pump and has 235k miles on it. A few years ago, the hydraulic fluid was changed out (mostly) when I replaced my radiator. I say "mostly" because I siphoned as much fluid out of the reservoir as I could and replaced with new. There have been no other issues, indications of failure, or other things pointing to the this system until just a few days ago. I have no signs of leaks on the hoses, and there is no loss of fluid in the system.
FSM mentions a "flow control orifice" as part of the high pressure line. It also mentions a "pressure relief valve" inside the flow control valve that has an affect on pump pressure.
Could either of these two components cause a fluid "starvation" condition in the system, which is what this seems like to me? I don't know what else to call it, except fluid starvation. There is adequate fluid in the reservoir, the pump and the fan are both running, but yet the pump exhibits "low fluid" symptoms only when the fan is running.
Are the flow control orifice or pressure relief valves replaceable, repairable, or able to be cleaned? I thought I read somewhere in here a couple years ago about a "2 orifice" versus "4 orifice" thing in the power steering system, but I can't seem to find info on that either.
Or is this just simply the pump going out and whining when under additional load of the running fan?
As it sits now, the Wk is parked until I can get more info on what the cause could be. I'm not inclined to throw a new pump on if I don't truly need it and I'm not about to replace the fan just yet. Need more information before I start tossing money at things. So, let's put our thinking caps on here and help me out, please!
Anybody got any ideas?