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Honda Pilot P/S Hose O-Ring Replacement Guide
How to change the o-ring gaskets for the power steering pump hoses in a 1st generation 2003 to 2008 Honda Pilot.

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2006 Pilot VTEC 3.5L V6
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Pull Off Plastic Engine Cover
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P/S Inlet Hose Joint
This automotive maintenance tutorial was specifically written to assist owners of the first generation (2003, 2004, 2005, 2006, 2007 and 2008) Honda Pilot SUV in changing the rubber o-ring gaskets for the power steering pump hoses to resolve the whining, groaning or moaning noise during cold start up as specified in TSB 07-060 (MDX or Pilot) and TSB 07-086 (Accord 2 door coupe or 4 door sedan).

Owners of other Honda or Acura vehicles such as the Accord, Civic, Crosstour, CR-V, CR-Z, Fit, Insight, Odyssey, Pilot, Ridgeline, ILX, TSX, TLX, TL, RLX, RDX, NSX and MDX may also find these DIY instructions to be helpful.

The updated orange rubber o-ring gaskets are genuine Honda part number 91345-RDA-A01. You'll also need a bottle of OEM Honda P/S fluid which is part number 08206-9002.

The tools needed to complete this procedure include a 10mm wrench or a 10mm socket with a universal swivel joint, a wobble extension bar and a 1/4" or 3/8" drive ratchet.



 
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Inlet Hose & Joint Removed
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P/S Fluid Leaking Out
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The first two steps are to open the hood and then gently pull off the plastic engine cover.

Set the engine cover aside in a safe place.

The power steering pump is located on the left (passenger) side of the engine.

The P/S inlet hose and joint are located at the bottom front edge of the power steering pump.

It is held in place by one 10mm bolt.

Place a shop towel or some paper towels below the hose to catch the power steering fluid that may leak out when you remove the joint.

Loosen the bolt by turning it in the counterclockwise direction with a small 10mm wrench.

Alternatively, you could use a 10mm socket with a wobble extension bar and/or a universal swivel joint and a 1/4" or 3/8" drive ratchet.

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Old Black Rubber O-Ring
Once the bolt is loose, spin it out the rest of the way by hand to prevent from having it fall down into the engine bay.

Set the 10mm bolt aside in a safe place.

Pull the old black rubber o-ring gasket out of the opening in the power steering pump.

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Old O-Ring Removed
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New Orange O-Rings
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Honda P/S Fluid 12 OZ
The newer orange rubber compound o-rings that prevent air from entering the inlet line and causing the moans, groans and whines from the power steering system are Honda part number 91345-RDA-A01.

A bottle of genuine OEM Honda power steering fluid is part number 08206-9002.

You will only need a few ounces of new P/S fluid to replace the fluid that leaks out when the hoses are disconnected.

(If you would like to change the P/S fluid, check out my Acura MDX Power Steering Fluid Replacement Guide.)



 

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Install New Orange O-Ring
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Re-Insert Inlet Joint
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Replace 10mm Bolt
Insert the new orange rubber o-ring into the inlet port in the power steering pump.

Push the inlet hose joint back into the power steering pump.

Re-insert the bolt and tighten it a few turns by hand in the clockwise direction to prevent it from becoming cross threaded.

Then tighten the bolt in the clockwise direction with the 10mm wrench to just past hand tight.

If you have a torque wrench that will fit in that tight space, the service manual specifies that the inlet joint bolt should be tightened to 8 lb-ft (11 Newton meters) of torque.

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Tighten To 8 lb-ft (11Nm)
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High Pressure Line - Top
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Loosen Two Bolts
The instructions for TSB 07-060 and TSB 07-086 (technical service bulletin) do not require replacing the rubber o-ring gasket for the high pressure outlet hose connector.

We went ahead and replaced it any way since the o-rings came in a pack of two and it only took an extra few minutes to replace it.

Loosen the two bolts on the high pressure power steering pump hose connector by turning them in the counterclockwise direction with a 10mm socket and a 1/4" or 3/8" drive ratchet.

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Loosen Counterclockwise
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Hose Connector Removed
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Black Rubber O-Ring
Pull the outlet hose connector straight out of the top of the power steering pump.

Carefully pull off the old black rubber o-ring.

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Replace With Orange O-Ring
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Push On Engine Cover
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Engine Cover Replaced
Install the new orange rubber o-ring to the outlet hose connector.

Push the connector straight into the top of the power steering pump.

Tighten the two bolts in the clockwise direction with the 10mm socket and a 1/4" or 3/8" drive ratchet.

Line up the rubber friction fasteners on the underside of the plastic engine cover with the pegs on the top of the engine.

Push the plastic engine cover back into place.

Check the level in the power steering fluid reservoir and top if off with new fluid if necessary. Replace the cap.

Start the engine and turn the steering wheel back and forth from lock to lock a few times to "burp" any air from the system.

Remove the cap again and check the level. Add more fluid if necessary to bring the level up to the "MAX" line. Replace the power steering fluid reservoir cap.

Be sure to record the o-ring change in your vehicle's service records.

For more, check out all of my 2003-2008 Honda Pilot DIY Repair & Maintenance Guides.
 

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