I had to repalce rack & pinion and while I was at it I replaced the pressure hose along with the pump. There is an annoying noise that sounds when driving slow and sounds like it is close to the firewall. Sounds like gulping or gurgaling. I can not figure it out. There are also some klunking noises that are more minimal at low speeds also. I did the repairs myself and I tightened the sub frame bolts along with swaybar and all others that I could find to tighten. After I replace R&M I had a 4 wheel thrust alignment and the car drives fine. Just the annoying sounds that I can't find.
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You need to first diagnose what is leaking. Most power steering leaks are in the pressure hose but not always. Pressure hoses will have screw on fittings and return hoses will usually just have spring clamps or screw type clamps on the end of the hose. Pressure hose most likely, return hoses 2nd, failing rack and pinion assy 3rd and pressure pump last. If its leaking from the bellows on the end of the rack and pinion the you will need a reman unit. Presure pumps are also remanufactured if thats what you need. hoses are replaced with new hoses or standard return hose for the return line.
A bad seal in the rack and pinion would have caused low pressure from fluid by-passing the seal. This also would have caused noticeably increased effort to steer the vehicle. Excessively high pressure would indicate an issue between the power steering pump and the rack, and since the hoses have been replaced I would focus on the pump. PS, find a real mechanic, not a parts changer.
No, the power steering is entirely a separate and sealed system, wholly external to the engine. The power steering pump pushes the fluid through a high pressure hose into the rack and pinion-the steering gear mounted below and behind the engine-and holds pressure within the rack that enables power assisted steering. At the same end where the power steering fluid hose enters the gear will be a fitting for a return line back to the fluid reservoir. These two hoses are usually routed close together at least part of the way, some may even be held together with brackets. Leaks could develop at the pump, the fluid reservoir, or the two hoses to and from the rack and pinion, or the seals inside the rack and pinion may have failed. You should be able to find the leak-it will only leak to the outside-to check the rack and pinion for leaks, right where your tie rods come out of the gear and go to the wheels for steering, will be a small rubber boot encasing the tie rod and the end of the rack assembly-on both ends is a boot and a tie rod-peel back the rubber boot from the gear ass\'y, it should be dry. If a lot of fluid, the seals in the rack and pinion are gone. It will have to be replaced. Hopefully you will find a leaking hose or fractured reservoir, but keep looking, air flow may be blowing the leaking fluid back and under the car. Good luck, hope it\'s not the rack and pinion.
Hello, Before you give up on the Power Steering pump, check out the bottom steering line that goes from the reservoir to the front of your Expedition. You will see that the fluid line has both metal tubing and rubber hose and it runs through body clips by the frame.
Over time the plastic clips hold water and salt and will eat through the metal line. This can cause pump failure, but it also can cause air to get in the lines and cause the pump to foam the fluid. The foaming reduces the efficiency of the pump. The steering pump comes out after you get everything out of the way. It should be easier than the water pump.
You want to check the line I mentioned first, before removing the pump. While you are doing that, check with your Autoparts store about the Power steering pully if you are buying a remanufacturered pump. Sometimes you need to remove the pulley before taking the pump off. Autozone, Oreilys and Advance have tool loaner programs.
A good repair shop would hook a pressure gauge up to the Power steering lines down at the rack and pinion and measure the working pressure of your pump. Then it would be a question of the rack and pinion failing to move if adequate pressure was provided. You would then know if the rack and pinion was bad. I do not have the specs for the pump available, but you will need to test within a given RPM range.
I hope this helps you. I have seen a lot of people replace pumps only to have the steering line cause the problem. The leak can draw air more than spilling fluid, and most people just automatically top off the reservoir without questioning where the fluid went.
RETURN TURN LINE GOES TO THE LEFT OF RACK PINION AND HIGH PRESSURE HOSE GOES TO THE RIGHT OF RACK PINION.LOOKING AT POWER STEERING PUMP HIGH PRESSURE HOSE THICK HOSE SCREWS INTO POWER STEERING PUMP.WHILE LOW PRESSURE HOSE HAS A HOSE WITH A CLAMP THE LOW PRESSURE HOSE HOOKS TO TOP OF POWER STEERING PUMP.LOW PRESSURE DONT SCREW INTO POWER STEERING PUMP IT IS HELD IN PLACE BY A HOSE SMALL CLAMP.
try lucas power steering stop-leak. drain some of the fuild and then pour that in. it is for surging rack & pinions, not just for leaks. if that doesn't work then you may have a defective rebuilt rack.
check power steering pump pressure, might be weak.