My steering is making a loud groaning noise in the cold mornings. Do I need more PS fluid? Where would I find the fill cap? I looked in my owners manual and it does not show a fill place? Is this what I need? Thanks 2001 C320
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more than likely it is just low on power steering fluid. system might have air in it now. so after fill power steering unit to proper level driver the car and check fluid level again. and add more if needed . I believe car should have motor running for when checking fluid, same as transmission.
he filled the PS fluid? it was low? If so it has a leak somewhere, usually the high pressure line. the rattle could be anything, have the front end and steering linkage checked. tie rods, sway bar links, ect.
I had this same problem and the dealer could not reproduce the noise when I would take it in to get looked at. (during the day when the temperature was warm) So I decided to leave it over night and they test drove it in the morning when the temperature was cold and they heard the noise. It ended up bing the steering rack.
You need to describe the problem better. Does it groan only when moving and turning, or will it make the same noise just sitting there turning the steering wheel. If it only makes noise when moving, that rules out a ps problem, the ps doesnt know if you are moving or not. Does it make different noise if you are going to the right or left, same noise, different? I dont know about the reservoir, some of them have filters, but I dont know if Buick does or not. If it was, it would cause a whine, not a groan.
The power steering leak is creating bubbles in your power steering pump which gets strained more when turning, which causes it to be louder when turning. If you know where your leak is, then fix that, then try to bleed your ps system by filling up with the cap off the resevoir and turning the steering wheel max left to max left with trans fluid. if the noise is still there then your ps pump needs to be replaced along with the ps vsv located on the side of the pump.
The first thing to check would be to make sure the power steering reservoir is not running near empty, locate the filler cap for the power steering pump it should be marked and then add the appropriate amount making sure you don't over fill, that may make the sound go away if not we must move on to the next possibility, by the way if the noise gets louder when you turn the steering wheel it is most likely the power steering pump or fluid level is low.
If the groaning sound is still happening, you are probably low on power steering fluid. I suggest starting there. Remove the cap and check the dipstick attached to the cap. The reason the sound would go away at high speeds is that you don't turn the wheel as sharply at higher speeds so the pump is not trying to pump air ( that's the groaning sound ).
If you are low on PS fluid, fill it but check for leaks for a while. Look under the car in the morning for fluid. If you spot a leak, take it back to whomever replaced the hose and have them fix it.
As far as the engine light goes, first make sure the gas cap is on properly, meaning all the way. Turn it till you hear it click several times. If that is all it was, the light should go off after 20-30 miles or so. If it stays on, try changing the gas cap. That is probably one of the cheapest routes to go.
The groaning noise is the power steer pump operating under duress. I would suggest having the front suspension checked for any seized or failing ball joints or control arm problems. Most suspension guys will give the undercarriage a look over for you for free to check for any failing/unsafe parts. The engine belt driving the power steer pump should also be checked in case it needs adjustment.