boaterboy Posted February 2, 2022 Share Posted February 2, 2022 When I move the steering wheel from side to side I can hear a 'hiss' at each change of direction. It occurs when the vehicle is stationary and when in motion. Please could somebody help me understand what might be the cause and how to remove it? The noise has only started very recently. Thank you for any help in anticipation. Quote Link to comment Share on other sites More sharing options...
bear Posted February 3, 2022 Share Posted February 3, 2022 Hi, Is the PAS fluid level ok? Also can you see it circulating in the resevoir when the engine is running? Griff Quote Link to comment Share on other sites More sharing options...
elbekko Posted February 4, 2022 Share Posted February 4, 2022 Has your power steering gotten harder to operate since? Sounds to me like the overpressure valve opening, although I've never heard of them failing tbh. Quote Link to comment Share on other sites More sharing options...
boaterboy Posted February 5, 2022 Author Share Posted February 5, 2022 Bear - the PAS fluid level is ok and the fluid looks to be 'churning' around the reservoir. When I saw this happening I was a bit concerned but since your comment I take it that this is an indication that the fluid is circulating and all is in order? The fluid is pretty hot when felt through the reservoir wall - I assume this is in order? elbekko - no the power steering feels as normal. Very oddly, the hissing has now disappeared. It was there for the duration of a trip of about 5 miles and then it went away. I did try moving the steering wheel from one extreme to the other in an attempt to remove the hiss. Is it possible for air to have got into the system somewhere and was being forced through a valve in the system? I'm sorry but I don't know the exact configuration of the hydraulic system to know whether or not that last comment makes sense. Many thanks to you both for taking the time to reply. I appreciated it. Quote Link to comment Share on other sites More sharing options...
bear Posted February 6, 2022 Share Posted February 6, 2022 See it circulating is normal. There shouldn't be air in the system unless you've done work on it. Glad it's gone away Griff Quote Link to comment Share on other sites More sharing options...
boaterboy Posted February 9, 2022 Author Share Posted February 9, 2022 I haven't done any work on the system but for a period there was a distinct hiss immediately on moving the steering wheel from one side to the other. The noise sounded like air being forced through an orifice in a valve (say). I suppose for air one could read fluid? Quote Link to comment Share on other sites More sharing options...
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