I have a 08 Sonata 2.4L The power steering pump is whining and the fluid is circling in the reservoir. I put a remaufactured pump on and it sounded worse than the original and after I put pump the old pump back on it was even louder than before. I talked with freind and he said it's the reservoir the screen is stopped up. Does anyone know of this problem?

 

TSB for resevoirs on older models... cant picture a 2008 having issue already..

If the screen was restricted, it would typically froth oil out of the cap.

Check your idler pulleys for similar noise.. V6 is common for idler pulley to mimmick P/S hydraulic whine.. can hear them in the aisle while back in the shop

 

Thanks for the info. I tried spraying the pulley's while the car was running to see if the noise would quiet down some but nothing changed so I purchase the reservoir through NAPA will install this weekend to see if it works. Also can you tell me if I flushed the P.S. system and put Valvoline ATF+4 instead of purchasing PSF-4 through the dealer which is high $ do you think it would be ok with all new fluid and not mixing the two. Thanks

 

I would stick to what Hyundai says to use just for the protection of the seals used if there was some kind of material used that would justify the need for the synthetis based PSF-4 oil...

Kia sells PSF-4 in qt bottle for better price than Hyundai does on the 12oz bottles.. and I think you can use the kia number at Hyundai..

 

I wanted to say thank you for the info. The fluid by the way was frothing but didn't notice until after reinstalling old P.S. Pump then it was real bad but not coming out of the cap. After installing the new reservoir and flushing out the old fluid, the pump got real quiet. The Sonata only has 47,800 miles just in case you come across it again. After doing some investigating on the fluid it turns out that valvoline makes the fluid for the power steering unit's on the Hyundai's. It's just full Synthetic Trans. fluid. I flushed out the old and put AFT+4 the pump makes less noise than it did before this problem occurred. If I have problems with the P.S. pump do to fluid problems I keep you up-to-date. Thanks