LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Diagnosing a power steering leak

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Old 02-06-18, 07:41 AM
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scrapinls
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Default Diagnosing a power steering leak

I have a bad power steering leak and have to fill it everyday.. I've replaced the air control valve and the line that comes off of the reservoir what's next? I purchased the Hardline anybody have any experience with changing these.. it's a 96 ls400
Old 02-06-18, 08:10 AM
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Scraape
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Originally Posted by scrapinls
I have a bad power steering leak and have to fill it everyday.. I've replaced the air control valve and the line that comes off of the reservoir what's next? I purchased the Hardline anybody have any experience with changing these.. it's a 96 ls400
make sure it's not leaking on to your alternator!

it could be leaking from the pump, there are a couple o-rings that may leak with age.

Also, are you using ATF or Power Steering Fluid? I have seen power steering leaks when improper fluid is used. These call for ATF from the factory.
Old 02-06-18, 09:26 AM
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Originally Posted by Scraape
make sure it's not leaking on to your alternator!

it could be leaking from the pump, there are a couple o-rings that may leak with age.

Also, are you using ATF or Power Steering Fluid? I have seen power steering leaks when improper fluid is used. These call for ATF from the factory.
Oh that's already happened to me! the air control valve started leaking onto my alternator went out on me two of miles from the house. I use ATF. I'll check the O-rings, are they easy to replace?
Old 02-06-18, 10:01 AM
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Originally Posted by scrapinls
Oh that's already happened to me! the air control valve started leaking onto my alternator went out on me two of miles from the house. I use ATF. I'll check the O-rings, are they easy to replace?
make sure it's not still leaking on your alternator!

I haven't replaced the o-rings yet, but i've had the parts sitting in my room for awhile. I have the part numbers I could get for you. Or you may be able to find them with a quick search on here
Old 02-06-18, 04:01 PM
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You need it up on ramps or a lift and look under there for the leak.
Old 02-06-18, 08:07 PM
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Originally Posted by scrapinls
I have a bad power steering leak and have to fill it everyday.. I've replaced the air control valve and the line that comes off of the reservoir what's next? I purchased the Hardline anybody have any experience with changing these.. it's a 96 ls400
Every day?!

So this sounds really, really dangerous...you run out of fluid and the steering wheel does not respond to input.

As you have been unable to sort it out thus far, so why not ask someone who knows??

Avoid statistic status....

Last edited by YODAONE; 02-06-18 at 08:12 PM.
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