Engine/Transmission (1998.5 - 2002) Steering pump, Hydra-boost, or both?

[billjackson]

I have an 02 FWD automatic. While on cruise at 65 mph, I had a sudden loss of power steering and brake boost. Power steering fluid was leaking from the steering pump, although it was impossible to determine exactly where the leak was coming from. I made the 30 miles home and washed the engine compartment down so I could have a better look to determine what had failed. No lose or broken hoses, although the steering pump is empty. I suspect that the hydraulic brake boost discharged and forced the fluid out through the fill cap. Now the questions:



1. Would driving the 30 miles or so have damaged the steering pump? If so, is there a better replacement unit available (the factory unit seems to be over worked).



2. Is it really necessary to remove the brake lines from the master cylinder to get the boost unit out for replacement? Just seems like additional work to have to bleed the entire brake system.



3. Where is the best source for getting the necessary parts? Steering pump and hydra-boost unit.



If anyone's aware of specific threads that might be helpful, please point them out. I've searched until tired.



Thanks, Bill

 

[B.G. Smith]

If the pump went completely dry, yes 30 miles will do it in. Put some fluid in the pump and start the engine and see if the pump is working. If the accumulator lost it's charge it may not have completely emptied the steering pump reservoir. If the pump takes the fluid and you see no leaks, fill the reservoir and try turning the wheels side to side, this will fill the system and expell any air trapped inside. If steering works then try the brakes with engine running, if boost works, kill engine and try brakes, if you have boost for first try then the booster still has some/all it's charge. I doubt you can get the booster out without disconnecting the lines. To keep from having to do a lot of bleeding you could go to NAPA or some good supply and get plugs for the master cylinder fittings. You won't get appreciable amount of air in the lines as they will basically be upright. Advance auto has the booster for like 229. 00 and pump for 85. 00 Should not be too hard to find. bg

 

[billjackson]

B. G. Smith,

Thank you for your wise advice! Followed it and found that the leak was actually a loose high pressure hose to the hydra-boost unit. Pump survived and seems to be working well. Had a sticky dump valve in the hydra-boost unit that caused self braking while trying to purge the system of air, but a few light taps with a small hammer on the unit's housing freed the valve and allowed the complete purge of the system. All is good!

Thanks again, Bill