I have a 2003 -Hyundai Santa Fe. 2.7 with 146,000miles

After a day of city driving and temp in the 70’s the fluid starts to froth and I hear a wining sound turning into a straining sound when turning right. There is no oil leaking and I had the system flushed about 6 mt ago and there was no sound until just recently.

Would air in the system cause that problem?

 

Bubbles are typically formed by one of three things:

Air in system
Water in fluid
Wrong fluid

Since you had the fluid changed 6 months ago, it is unlikely that you have water in the fluid. It is also unlikely the wrong fluid was used, as you would have seen the problem right away.

I suspect air in the system. Check the clamps that hold the low pressure hoses that connect to the reservoir from the rack, and the reservoir to the pump. Quite often these clamps lose their 'springiness' and hold looser than when new. Also, as hoses get older, they get harder, and old clamps and hard hoses often let in air.

Although I haven't seen this in my wife's Santa Fe, I have seen it in many Subarus, especially the turbo cars that get hot under the hood.

You will need to bleed the system of air after replacing the clamps. The easiest way is to put the front of the car up on jackstands and steer back and forth a dozen times or so, or until you see no more bubbles in the reservoir. Be nice to the PS pump - don't steer too hard at the limits of the steering, as this puts undue stress on the pump.

Let us know the results!

 

I will check this out I did have 1.5 years ago the hoses. I was under the car Sun and the only leak I saw was a little oil from the drain plug very little

Thanks I will get back to you

Scuba Paul

 

Thanks twkd it was the upper hose there were cracks in the inner top hose to the fluid well. The short curved hose. Went to a couple hydrilic shops to make a hose but it was a strange size so I had to get it at the Dealer

once again thanks

 

Thanks for posting an update. Glad to hear your power steering is working well again!