Power steering pump is an easy 1 hour R&R. If just the seals are bad then yours can be rebuilt by as the seal kit sells for $40.00 or so at Lexus. Power steering pumps have always been a sore spot on Lexus V8's. Procrastinate and if leaking it can also take out the alternator as it sits directly below it.
I highly recommend a 6 point socket to remove the bolts holding the pump to the block. They are on there tight and once stripped are a PITA to remove.

 

Lee,

Well when I was supercharged one of the power steering lines started leaking at a connection which I think damaged the pump. I had a new line made for it but it was too late. When I installed the new line it was whining. I tried some steering fluids to fix it but it didn't help. I am getting ready to put the car up for sale so I want to fix it prior to selling it. I would be wary to just get the deals rebuilt and it not be the problem. Trying not to dump anymore money into the car now it is for sale

Your thoughts?? Thanks man,

Jonny

 

Jonny,

If you are hearing whining from the system it is not seals but rather a restriction ,bad valve (unlikely) , or dirt in the sytem preventing the valve from operating properly (very likely).
Now I have had a line repaired in the past and it was very solid, however the welder (brazer) restricted the line on the inside so much from the brazing that the pump was starving. I simply drilled out the restriction and all went well. This could be one issue you are running into. To view this will mean to remove the line and look inside at the opening.
New PS pumps are $400.00 or so. Used ones on Ebay go for around $75-$125. I would first check the line and then if a not go, replace the pump.