My PS pump has been a little noisier than my other 4.7 pumps were since I bought this vehicle, but within the last 6 months the whine has increased a little every month or so. It is still not noisy enough to be heard with the windows up, but I am sure that if the weather was colder it would be. I used my mechanic stethoscope to pinpoint that its definitely the PS pump.
Rack was replaced with OEM at 160k. 15k after that steering rack replacement the pump started making a little bit more noise. Fluid was serviceable, but I did pulled the reservoir and made sure it was clean (it was), and exchanged all of the fluid. Pump didn't get any quieter. I did another exchange on it recently (185k) prior to a short trip to the San Juan's and fluid was serviceable and did not need to be changed.
Pump still making noise. Zero leaks. No modifiers in the fluid. I did try a tablespoon of downy prior to the most recent fluid exchange but didn't notice any change in noise.
We knocked out about 100 miles of trail, with the pump getting angry on one short section of trail while at full lock for over 3 minutes. After a few minutes idling to cool back down it was fine.
I've known the pump needs to be replaced for awhile but wanted to get a bit more info from folks on here:
1. Who's needed to replace a pump? This seems like a component that has a long service life if fluid is exchanged and the rack replacement is tackled as soon as it starts leaking. P.O.'s maintenance records show a rack leak was found at 130k. He elected for a fluid modifier to be added vs. the rack replacement at that time. 30k later the rack needed to be replaced - I'm sure it was run low occasionally before fluid was added.
2. OEM pump prices are now at $270+ shipping. If there is a good alternative I'd love to hear about it.
3. Other items to tackle with this pump out - alternator brushes seem to be the only one that comes to mind. I am at 186k now, on track to be doing my TB/WP etc. at 212k and would prefer to mess around with the alt. at that point.
Rack was replaced with OEM at 160k. 15k after that steering rack replacement the pump started making a little bit more noise. Fluid was serviceable, but I did pulled the reservoir and made sure it was clean (it was), and exchanged all of the fluid. Pump didn't get any quieter. I did another exchange on it recently (185k) prior to a short trip to the San Juan's and fluid was serviceable and did not need to be changed.
Pump still making noise. Zero leaks. No modifiers in the fluid. I did try a tablespoon of downy prior to the most recent fluid exchange but didn't notice any change in noise.
We knocked out about 100 miles of trail, with the pump getting angry on one short section of trail while at full lock for over 3 minutes. After a few minutes idling to cool back down it was fine.
I've known the pump needs to be replaced for awhile but wanted to get a bit more info from folks on here:
1. Who's needed to replace a pump? This seems like a component that has a long service life if fluid is exchanged and the rack replacement is tackled as soon as it starts leaking. P.O.'s maintenance records show a rack leak was found at 130k. He elected for a fluid modifier to be added vs. the rack replacement at that time. 30k later the rack needed to be replaced - I'm sure it was run low occasionally before fluid was added.
2. OEM pump prices are now at $270+ shipping. If there is a good alternative I'd love to hear about it.
3. Other items to tackle with this pump out - alternator brushes seem to be the only one that comes to mind. I am at 186k now, on track to be doing my TB/WP etc. at 212k and would prefer to mess around with the alt. at that point.
