Question about 1990 Toyota 4Runner

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Power Steering Leak

I have this problem also. We've replaced the pump and hoses and it still leaks and has for a long time. I don't even put fluid in now as it's pointless! Therefore, it is very difficult to make tight turns.

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  • Richard Scordino May 11, 2010

    So, what's the question? You know it leaks, you know you ran it without fluid (likely destroying all hydraulic parts except the hoses) and without fluid it dosen't work right? It can't!!!!

  • yadayada
    yadayada May 11, 2010

    what is the question here? it is obvious that you replaced the wrong parts, have a pro look at it.

  • Ned C Cook
    Ned C Cook May 11, 2010

    where is it leaking from?

  • Dar
    Dar May 11, 2010

    And you can't tell where it's coming from? Is it coming from the steering box, or near the pump?

  • bilalinmd
    bilalinmd May 11, 2010

    Check to see where it is leaking from. Have your local repair shop put some fluorescent dye in the power steering fluid and check with a UV light. It could be your steering rack that is leaking.



    Bilal Hassan

    Clarksville, MD

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  • Toyota Master
  • 358 Answers

Check the boots on the rack and pinion. they will hold fluid and then start leaking on the tie rod adjustment arms.

Posted on Jun 03, 2009

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Power Steering Pump Noise


As you turn your steering wheel it is this fluid pressure that aids in turning the wheels of your car. ... If the pump impeller is trying to move power steering fluid and starts catching air bubbles it can cause whining noises and vibrations to occur.
Maybe you've heard it at a stop light. Maybe you've heard it as you pass a car on the freeway. Or maybe you've heard it in the parking lot at work when someone is leaving. The unmistakable whine of a power steering pump can make even the most confident mechanic wonder when that car will breakdown.
Power steering pump noise is a unique noise that your car may make and once you've heard it you always know what it is. The noise is a mix of a whirring and a whining and will always vary with the speed of your engine whether your car is driving or in park. This whining noise can be subtle or extremely loud and may be worse in colder weather, or right when you first start your car.
Power steering pumps are most often vain style centrifugal pumps that are tasked with pressurizing the power steering fluid and pushing it down to your power steering gear or rack. As you turn your steering wheel it is this fluid pressure that aids in turning the wheels of your car.
There are a few reasons why you are hearing power steering pump noise from your car. First, it may simply be due to the design of the pump. Sometimes, noisy power steering pumps can continue to work flawlessly for years after they start making noise. This may simply be due to the manufacture's design or a tight tolerance in that particular pump. In this case, you would hear the noise but not see any other adverse effect like a loss in power steering, leaking fluid or a wobbly pulley. In this case, you may be able to help reduce your power steering pump noise by choosing a different type of power steering fluid, like a synthetic fluid.
Your power steering pump may also be making noises due to air trapped in the system. If the pump impeller is trying to move power steering fluid and starts catching air bubbles it can cause whining noises and vibrations to occur. Even tiny air bubbles you cannot see that are trapping in the power steering fluid may be causing the whining you are hearing. In this case, the best thing to do is flush your power steering system to try and remove the air from the system. Having air trapped in your power steering system can be difficult to diagnose so you may need to simply try a power steering flush to see if it solves your problem.
Power Steering pump noise may also be due to a failing power steering pump. As the bearings on the impeller go bad it will start to make noise as the pump is turning. If you have a bad power steering pump you usually will also experience leaks from around the pulley, a wobbly pulley, or difficulty turning the steering wheel when you are stopped. If you have multiple of these symptoms together, it is probably time to replace your power steering pump.
Lastly, and most usually, a whining power steering pump is an indication of a low fluid level. Your power steering fluid is probably something you have rarely if ever checked, so it often comes as a surprise if the level is low. Your power steering fluid reservoir is also relatively small so even a slow leak will cause a low fluid level relatively quickly. To confirm this is your problem it is as simple as checking your power steering fluid level. Some power steering reservoirs are clear so you can see through them to check how full they are. You may have to wipe away some dirt and grime to find the "full" line, but it should be easy to check. If you have an opaque power steering fluid reservoir there should be a small dipstick under the cap that will help you measure the fluid level. If it is low, then you have a leak somewhere and topping off the fluid should quite down your power steering pump.
If you discover a power steering leak, rather than simply continuing to add fluid every time it gets low, you should fix the problem permanently so you don't have to continue to check your power steering fluid level. Replacing lines or seals can be a surprisingly difficult task due to the location of your power steering pump and steering gear or rack. The easiest way to seal your leak is to do it from the inside out!

try this link out for more power steering problems.
Power steering whining sqreeching Google Search

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Steering hose leak


use this it will never leak again and works great Lucas Oil UK Power Steering Stop Leak usa website is the same address as im in uk puts up uk. use the right amount that is in your system owner manual or check SUV web info on systerm.

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Power steering leak


with power-steering it could be one of three problems. 1- power steering pump could be going out ( normally with the pump the car will whine but will not normally leak and still hold fluid) 2- a leak in your power steering lines ( and can normally be resolved with new lines or sometimes you may be able to bypass and clamp the leak on the line) 3- you may have busted the O rings in your powersteering pump and that will actually cause the pump to leak

hint- alot of people will tell you that you may also use transmission fluid for power-steering this is true you can its that same thing as power-steering fluid just a different color (but dont put power-steering fluid in a transmission, but at the same time if you plan on replacing the pump i would use transmission fluid due to it being cheaper but it will cause the O rings in the power-steering pump to go out quicker to cause a worse leak) so i would recommend to locate the leak first before using trans fluid due to if its in a line you wont have to replace the pump but if its already the pump this is the cheapest fix until repaired

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Noise when terning and while just going straight plus losing fluid


You've got a power steering fluid leak. The noise is the power steering pump low on fluid. I would put some Lucas Power Steering treatment in the system and refill the fluid. It won't fix the leak forever, but it will recondition the seals and rubber and buy you a lot of time.

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I refill and it leaks out even if engine off. have to refill by 25 miles. cant find the leak but puddles are under car around pump area. cant figure if it is hose or pump. looked at picture of powercraft...


Well don't know exactly what vehicle you are working on but it is very possible that if is a car then the inner seals on the rack-n-pinion are worn out causing the fluid to leak out. If it is the rack seals leaking then you will need to replace the rack-n-pinion. Good luck.

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All depends what is leaking. For power steering leaks there is not much to do but replace the leaking part. If it is a hose it is not a big deal. If it is the power steering pump itself check autozone, etc for availability. They'll probably have to order it in for you. Sometimes you luck out and the leak is due to a seal where a hose is screwed into the pump or the rack and pinion unit. I believe some auto parts places carry stop leak for power steering units but I have no experience with them. One last thought is if the car is pretty old and the leak a slow one, you just check your power steering fluid periodically because you can buy a whole lot of power steering fluid for the price you'll pay for a power steering pump. You can also consider a replacement from a junk yard. Generally power steering pumps out last the cars they are put in.

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