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Discussion Starter · #1 ·
So finally did my PS Pump O-Ring and Fluid Flush..

Man cheapo Honda of México delivered the O-Ring on a simple plain plastic bag with the Part No written in sharpie... Well the MDX flush requires around 2.5 bottles of PS Fluid I ended up sucking part of it after the flush so I could use all 3 bottles and keep a single spare. The cyringue is for sucking the PS fluid out of the reservoir.










Flush went smoothly and my steering is now way lighter than before.. The oil was not dirty it's just the color of the AUTOZONE branded fluid I have been using for months due to my leak.. The leak was caused by a faulty O-Ring which to my surprise it was a Red replacement O-Ring not the OE black one so I dunno how that went bad.

Now I am all leak free and with a smoother steering.
 
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Discussion Starter · #2 ·
Yup went for a ride and definitely the steering is lighter with better assist at low speed and not a single drop of fluid leaked out beneath the PS Inlet so its a Win-Win!
 

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Good job :29:

The (2nd gen. MDX) Power Steering Fluid Change/Flush has definitely got to be one of the easier DIY maintenance items that anyone should be capable of doing- I (sort of) did mine during last Winter '16....

I whipped out my debit card and watched as the Stealership's (fresh outta high school) cashier/phone greeter eagerly sucked $130 out of my Bank of America checking account- took about an hour for them to complete this job and while the complimentary 'Starbucks' coffee was average at best (definitely not worth $130)- I do appreciate having checked this off of my maintenance to do list while not having to return to it for at least another 30,000 miles later (please correct me if I'm wrong on this recommended power steering fluid change interval?).

In the end- I also noticed the overall smoother steering immediately afterwards! :wink:
 

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Discussion Starter · #5 ·
Priscilla
Honda say the fluid is basically lifetime but every 100K sounds enough for me for a flush.

Logical
The syringe took AGES not only the needle was too small making the suction hard and slow. But the damn thing could only suck 10ml at a time!!! So I ended up ditching the needle and sucking as much as I could inserting the body of the syringe.. The bottom fluid required the needle so yeah it took forever, The upside was there wasn't any spills so no mess until I removed the Reservoir to clean it.
 
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My 07 with almost 120k miles on it has some really low assistance on the steering, engine bogs way to much in my opinion.. Would you say that this is something I should do to fix it? Haven't looked at it in the reservoir, but probably would look pretty gross...
 

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Discussion Starter · #7 ·
Definitely do it! I was looking at better assist at low speed since I bought it, It felt under assisted in parking lots. When I added my 265s it only made it worse.

Now it has a little bit more assist at low speed but it felt very improved at high speed. Since I have been leaking since months I think my system was running healthy there wasn't any sludge or dark fluid on it. Perhaps the Autozone fluid was thicker or who knows? Now I am running almost pure Honda PS fluid and it does make a difference.

I will say go for it but do not use a stupid syringe.... Turkey Baster for the win!
 

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When you replace the o-ring on the PS fluid inlet, how did you manage to remove that 10mm bolt hidden below the hose? Which tools did you use and how exactly did you use it?

I did mine two years ago. But it took me forever to deal with that bolt. I am thinking that I probably need a half moon wrench to get it done easily.
 

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When you replace the o-ring on the PS fluid inlet, how did you manage to remove that 10mm bolt hidden below the hose? Which tools did you use and how exactly did you use it?

I did mine two years ago. But it took me forever to deal with that bolt. I am thinking that I probably need a half moon wrench to get it done easily.
I just did this oring about a month ago, used a simple 10mm open end wrench thru the power steering pulley. Make sure the closed end has an angle to it.

Sent from my SM-G950U using Tapatalk
 

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Last Winter, I used my handy 3 by 2 tool (as in inches) to complete the power steering fluid flush on my '09 MDX :laugh:

<center><img src="http://4.bp.blogspot.com/_7UOpW9vAyIE/TTfb0kfrkdI/AAAAAAAAEdg/gQWdnsJNBEo/s1600/hello_kitty_credit_card.jpg" width="60%" height="60%"></center>
 

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I just did this oring about a month ago, used a simple 10mm open end wrench thru the power steering pulley. Make sure the closed end has an angle to it.

Sent from my SM-G950U using Tapatalk
That is the same as I used. But it made me very miserable. Maybe my wrench is slightly less suitable for this job, or my hands are not so skillful? Anyway I am still searching for a miracle wrenches. (I have bought a deep offset wrench and a stubby wrench. Both worked less well.)
 

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Discussion Starter · #15 ·
My tools for changing the O-Ring where these:


Like doubleot said the trick is not using a straight angle wrench, It needs an angle to fit correctly though the belt and PS pulley..
 

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bumping this thread as SPRING is here, and this will likely be on my TO DO LIST for my next independent Acura mechanic visit...

in addition to flushing out the power steering fluid, may also have the mechanic swap out the steering pump o-ring set

POWER STEERING PUMP O-RING SET 91345-RDA-A01 / 91370-SV4-000
https://www.ebay.com/itm/NEW-GENUIN...-SET-91345-RDA-A01-91370-SV4-000/183383819218

Genuine Honda Power Steering Pump O-Ring SET
Whats Included?
1x 91345-RDA-A01, P/S Hose O-Ring Inlet nipple to pump body.(13x1.9). 1x 91370-SV4-000, P/S Hose O-Ring Power steering pump outlet to pressure hose inlet.(14.8x1.9mm).

<center><img src="https://i.ebayimg.com/images/g/RAwAAOSwRDFbdq9V/s-l1600.png" width="60%" height="60%></center><br>
 

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Discussion Starter · #18 ·
The kit comes with 2x O-Rings.. One for the outlet and one for the inlet..
The leak comes from the INLET aka RED O-RING.. I didn´t touch the Outlet (High Pressure) O-Ring which is the black one.
 
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Looks like Mr. AcuraAddicted ended up replacing both O rings (both the BLACK and RED one at about 8:04 into in his video below) :nerd:

*good to know however that the leak only comes from the RED ring...I may just have my independent Acura mechanic go ahead and replace both rings (also the BLACK one) for the heck of it- hopefully its not too much additional labor (aka higher $BILL$) for him to do so. :29:

Acura MDX Whining Power Steering Pump fix DIY
 

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I replaced both as well.

Since you get 2 new O- rings, and you're already in there, you may as well replace both so that you don't have to worry about going back too soon for replacement of the other O-ring.

There is a reason they send you 2 O-rings. ;)
 
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