Acura MDX power steering makes whining noise. Replaced o-ring twice. The noise went away for two weeks. Then it came back.
First time I replaced o-ring (orange color), the noise went away for a few weeks, then noise came back. Then i replaced power steering pump with a re-built one and o-ring. The noise went away again. Then came back. 5 months later, i put in the original pump back with new o-ring, noise went away for 2 weeks. then came back again. Now i believe both original pump and rebuilt pump are fine. Leak happened somewhere else. I am baffled why for 2 weeks right after change o-ring, there was no noise.
no. i don't fill the fluid to "FULL" line. If i do that, i will lose fluid because of foaming.
i know the foaming is caused by air leaking into the system. However i don't understand why leakage was not present right after i changed o-ring (2 weeks), then it re-appeared. Could the o-ring be damaged so quickly?
what's the part number for the hose and o-ring?
forgot to mention mine is 2003 MDX
i got the info from your first post. here are the part numbers:
i am able to find the o-ring on http://www.hondapartsunlimited.com/parts-catalog/acura/mdx/2003/5dr-prem/ka5at/chassis/ps-lines, but not hose. Are you sure the first part only has 4 digits?