I am driving 2005 Civic Oriel with about 40,000Km running. Its power steering hydraulic pump is making excessive humming noise. The pump is, usually, fine when I start but after a few minutes drive and some turns it starts the noise. The noise increases as I increase the engine RPM (which obviously increases pump’s RPM) and when I make deeper turns. I have once changed the pump with a used (kabuli) pump. The new pump worked fine for 2-3 weeks but then it also started making noise. Initially it was not very loud but has increased tremendously with time. Thus I think there is some other problem in the power steering system which is in-turn causing the issues with power steering pump. Moreover, I also think that my steering is bit harder than the other civics.
I need help/suggestions from you guys about following:
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Any experiences about this issue and/or any tips/help in the diagnosis.
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Recommendation about how to fix it.
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Any good mechanic that you guys can recommend for this issue in Islamabad, or even Pindi.
I am counting on you guys so please do help. This noise ruins my drive everyday.