whine noise
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Joined: Jan 2015
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From: Tulsa, OK
whine noise
I have a 2009 F-150 with 5.4L 4x4. Recently I've been hearing a whining noise when I'm driving at low speeds. I don't hear it at startup and if the truck is idling in the driveway the sound goes away after a while. Only while accelerating and turning. I can't tell if it gets worse while turning or not.
At first I thought it was an idler pulley, but since it doesn't happen when idling, I am leaning on power steering pump. Do you guys agree?
Thanks,
KC
At first I thought it was an idler pulley, but since it doesn't happen when idling, I am leaning on power steering pump. Do you guys agree?
Thanks,
KC
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Joined: Jul 2011
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From: Sioux Falls Area
Mercon V is the specified fluid for your truck, so anything labeled as such should be fine. PS systems aren't very particular in general.
here's what I did on my expedition:
https://www.ford-trucks.com/forums/1...ing-fluid.html
I like synthetics as they are a "one and done" kinda deal for stuff like this. Nothing wrong with conventional, though. If you are going to go with a conventional fluid, I'd suggest just getting the SuperTech brand at Walmart. It is usually the cheapest and it carries the official Ford approval.
I'd have 3 quarts on hand or so to do the change if you do it the same way I did. I burned 2 quarts or more with the dump and fill to get the fluid nice and clean.
if you can get the supply and return lines off, you can do it with much less fluid, but the dump and fill is about as simple as it gets.
here's what I did on my expedition:
https://www.ford-trucks.com/forums/1...ing-fluid.html
I like synthetics as they are a "one and done" kinda deal for stuff like this. Nothing wrong with conventional, though. If you are going to go with a conventional fluid, I'd suggest just getting the SuperTech brand at Walmart. It is usually the cheapest and it carries the official Ford approval.
I'd have 3 quarts on hand or so to do the change if you do it the same way I did. I burned 2 quarts or more with the dump and fill to get the fluid nice and clean.
if you can get the supply and return lines off, you can do it with much less fluid, but the dump and fill is about as simple as it gets.
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Junior User
Joined: Jan 2015
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From: Tulsa, OK
Just to be thorough I topped off the PS fluid with Mercon V. The fluid level was about an inch below minimum and I filled it halfway between minimum and maximum. Sure enough, the noise stopped. So I'm going flush the PS system anyways but I'm going to return the pump that I bought the other day! $$$
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Joined: Jul 2011
Posts: 6,509
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From: Sioux Falls Area
Sounds like a good plan. If topping off the fluid fixed the noise then a fluid exchange should keep you in good shape for a long time.
This is from a different forum, but here's another way to change out the fluid without wasting as much.
This is from a different forum, but here's another way to change out the fluid without wasting as much.
Originally Posted by Ihatetochangeoil
It's kinda messy...I use a 10 quart clear plastic salad tray cause its big and spread out to catch the fluid...Jack the vehicle up in front on both sides so the power steering system is NOT under load...undo the clamp off the bottom of the PS pump (return line)...let the fluid drain from the reservoir...Hang the open end lower... DO NOT start the vehicle...turn the steering wheel back and forth, lock to lock, until fluid quits coming out of the line and reservoir. Reconnect the line and use a small container to refill the fluid...Turn the wheel back and forth lock to lock at least 10 times WITHOUT starting the vehicle...add fluid again...turn the steering wheel again and again until it QUIETS DOWN...Start the vehicle...turn the wheels again and again and keep adding fluid as necessary...When you are satisfied that it sounds OK, start the vehicle and do it again and again...DON'T set it down off the jackstands until you LIKE the way it sounds. It probably took me longer to type this than to do it. A buddy or helper to turn the wheel while you're under it is a great help.
I've done this several times on different vehicles. The fluid costs less than $15, it takes less than an hour, and I'm sure you save $120 or more.
Unfortunately, unlike motor oil and brake fluid, I know of no empirical test for PS fluid. I DID use a veterinary syringe (available at any farm store) to pull a sample of the old fluid (prior to changing) to look at in good lighting conditions and compare to new fluid. I admit I changed the fluid simply because I didn't like how dark it looked next to the new (clear plastic) fluid bottle.
I also added ATP 205 reseal: ATP at 205 re Seal Stops Leaks 8 Ounce Bottle Free Shipping New | eBay
Wear rubber gloves, safety glasses, have a cup of coffee and fun!
I've done this several times on different vehicles. The fluid costs less than $15, it takes less than an hour, and I'm sure you save $120 or more.
Unfortunately, unlike motor oil and brake fluid, I know of no empirical test for PS fluid. I DID use a veterinary syringe (available at any farm store) to pull a sample of the old fluid (prior to changing) to look at in good lighting conditions and compare to new fluid. I admit I changed the fluid simply because I didn't like how dark it looked next to the new (clear plastic) fluid bottle.
I also added ATP 205 reseal: ATP at 205 re Seal Stops Leaks 8 Ounce Bottle Free Shipping New | eBay
Wear rubber gloves, safety glasses, have a cup of coffee and fun!
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