Does CHS11S.....Change Color Over Time?
Discussion
Hey Folks,
I'm diagnosing some Power Steering foibles on my '13 DB9....namely, that I feel a slight judder when turning the wheel. I know that can be a failing power steering pump, but I've literally never heard of that happening on a DB9, so I'm looking at other options first.
I noticed that my power steering fluid was a couple ounces low in the reservoir........but when going to fill it up, I saw something more odd:
My car should have CHF11S from factory (at least, the cap indicates that), which is usually GREEN. But the fluid in my reservoir is ORANGE.
The CHF11S fluid in my old E46 M3 was still green after 20 years....did someone put the wrong fluid in my car during a flush at some point in recent history?
I'm diagnosing some Power Steering foibles on my '13 DB9....namely, that I feel a slight judder when turning the wheel. I know that can be a failing power steering pump, but I've literally never heard of that happening on a DB9, so I'm looking at other options first.
I noticed that my power steering fluid was a couple ounces low in the reservoir........but when going to fill it up, I saw something more odd:
My car should have CHF11S from factory (at least, the cap indicates that), which is usually GREEN. But the fluid in my reservoir is ORANGE.
The CHF11S fluid in my old E46 M3 was still green after 20 years....did someone put the wrong fluid in my car during a flush at some point in recent history?
Edited by andratch on Tuesday 4th November 04:05
That's very strange.
My early DB9 uses CHF11S and it is green.
I carried out a full flush a couple of years ago,the old fluid tends to go black when old not orange, look at Aston 1936.
Steering wheel judder does point to a defective pump, but I would dump all that orange fluid and refill with CHF11S.
My early DB9 uses CHF11S and it is green.
I carried out a full flush a couple of years ago,the old fluid tends to go black when old not orange, look at Aston 1936.
Steering wheel judder does point to a defective pump, but I would dump all that orange fluid and refill with CHF11S.
Edited by paulrog1 on Tuesday 4th November 06:26
paulrog1 said:
That's very strange.
My early DB9 uses CHF11S and it is green.
I carried out a full flush a couple of years ago,the old fluid tends to go black when old not orange, look at Aston 1936.
Steering wheel judder does point to a defective pump, but I would dump all that orange fluid and refill with CHF11S.
I'm hoping that the fluid was filled wrong at some point - standard ATF and CHF11S are quite different, so maybe that is enough to get things back functioning properly. The fluid that's in there is 'clean,' so it's not like it turned dirty-brown with use over time, but it's definitely not green in any way. My early DB9 uses CHF11S and it is green.
I carried out a full flush a couple of years ago,the old fluid tends to go black when old not orange, look at Aston 1936.
Steering wheel judder does point to a defective pump, but I would dump all that orange fluid and refill with CHF11S.
Edited by paulrog1 on Tuesday 4th November 06:26
If not, the power steering pump doesn't seem too terribly difficult to access, assuming there aren't any hidden bolts that require half the engine to come apart. There are no noises or other indications of issue from the pump yet, so perhaps it just doesn't like the viscosity or whatever.
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