Is it possible to suck air in to the power steering system from steering rack shaft seals?

My 2008 Honda Civic is making whining noise and I can see air bubbles in the steering fluid reservoir.

I have replaced the o'ring in suction side. However, I'm still seeing air bubbles (only when turning) and hearing some tapping noise when turning left (drr drr noise from the reservoir like pushing air through the reservoir. like a rattling noise).

Also few drops of fluid also dripping from the right side of the steering rack. I'm assuming when turning left, air is entering to the system from the right side seal.

Is this possible?

  • Where is the pump located? Is it high up on the engine? Is the reservoir located on the pump or separate to the pump?
    – HandyHowie
    May 10, 2021 at 11:47
  • Is this your engine? Does the video help - youtube.com/watch?v=Q72M8fUNzXw
    – HandyHowie
    May 10, 2021 at 12:07
  • @HandyHowie it is R18A engine. Pump is located at the middle of engine and the reservoir is in a seperate location. Yep. that's my engine and I already replaced those seals. May 10, 2021 at 12:20
  • I would have thought that everything after the pump would be under pressure, so air wouldn’t be sucked in. Therefore I would be looking at the low pressure side of the pump still.
    – HandyHowie
    May 10, 2021 at 13:38
  • 1
    You should write an answer to your question.
    – HandyHowie
    May 12, 2021 at 8:11


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