96 LS400 Power Steering Fluid Leak - ClubLexus - Lexus Forum Discussion


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96 LS400 Power Steering Fluid Leak

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Old 01-17-14, 12:04 PM   #1
aymaddemir
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Default 96 LS400 Power Steering Fluid Leak

There are some oil leaks, if any one can give suggestion, how it occurs, and how to fix them, I am from Dubai.. And there mechanics are not well trained to do it, i have gone couples of time, but the problem is still there, so i want to diagnose and do it myself repaired if possible in home...

Anyone plz get me out of this misery, i fuchin' love my queen, cant see her in this situation...
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Old 01-17-14, 12:20 PM   #2
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I don't know if this is relevant or not for your case - but you may want to see if there's anything applicable in this thread: The First Gen Power Steering Bible - https://www.clublexus.com/forums/ls4...ing-bible.html
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Old 01-17-14, 12:58 PM   #3
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most common place a 96 LS400 leaks is the $3 o-ring between power steering reservoir and pump - make sure to get the real Toyota o-ring - part number 90301-11016

if the o-ring doesn't stop the leak, high pressure hose is next most likely - ignore the places where you see fluid, because with a PS leak, fluid migrates EVERYWHERE, confusing the mechanic!

that leak at your PVC valve is no big deal, just replace PVC valve and grommet and clamp Toyota part# 12204-50011 and 90480-18001 and 90467-15021

the PVC leak is not urgent, but the power steering leak will quickly ruin your expensive alternator!
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Old 01-17-14, 01:13 PM   #4
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is repacing the pvc valve a easy job?
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Old 01-17-14, 01:24 PM   #5
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Quote:
Originally Posted by LScowboyLS View Post
most common place a 96 LS400 leaks is the $3 o-ring between power steering reservoir and pump - make sure to get the real Toyota o-ring - part number 90301-11016

if the o-ring doesn't stop the leak, high pressure hose is next most likely - ignore the places where you see fluid, because with a PS leak, fluid migrates EVERYWHERE, confusing the mechanic!

that leak at your PVC valve is no big deal, just replace PVC valve and grommet and clamp Toyota part# 12204-50011 and 90480-18001 and 90467-15021

the PVC leak is not urgent, but the power steering leak will quickly ruin your expensive alternator!
LSCowboy - does this advice apply to 93 LS's as well?
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Old 01-17-14, 01:39 PM   #6
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Quote:
Originally Posted by bubs View Post
LSCowboy - does this advice apply to 93 LS's as well?
yes - all years, that is pretty much the order of things, occasionally the problem is in low pressure return line or even pump itself, and I have never seen an LS400 rack that was truly leaking (more than just the slightest seep, which is a "who cares?" )
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Old 01-17-14, 01:40 PM   #7
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Quote:
Originally Posted by OMAHA View Post
is repacing the pvc valve a easy job?
well that depends on if you have somewhere to be in the next 90 seconds - lol

PS - the key is to have a set of these (every backyard mechanic needs them!)

Last edited by LScowboyLS; 01-17-14 at 01:45 PM.
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Old 01-17-14, 04:01 PM   #8
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The PCV valve is very easy to do like LSCowboy Said, but just check the condition of the hose running to the intake and order another one if need be before getting started!

When i took mine off, the hose broke in half because it was totally dry rotted, and i had to ghetto rig it with generic PCV hose and a 90 degree plastic bend. Looked aweful, but held up until i got the new hose from Lexus. It's a rather tight bend and it won't clear the plastic engine cover if you have a 95 or up.
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Old 01-18-14, 10:48 AM   #9
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The PCV is easy unless the grommet has hardened to a plastic like state. If that's the case its annoying. That grommet broke into several pieces and fell inside the valve cover when I did mine. Make sure you have some small needle nose pliers or a tool that can get in and grab those small bits.
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Old 01-18-14, 10:53 AM   #10
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Quote:
Originally Posted by dc893 View Post
The PCV is easy unless the grommet has hardened to a plastic like state. If that's the case its annoying. That grommet broke into several pieces and fell inside the valve cover when I did mine. Make sure you have some small needle nose pliers or a tool that can get in and grab those small bits.
yikes! - very good warning!

never had that happen but any bits left inside the valve cover would be very bad indeed!
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Old 01-19-14, 12:14 PM   #11
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'93 LS400 I just very recently saw the same thing, but only leaking around the steering fluid canister. The steering has been a little tight. This is next on my list to take to the mechanic. I've read quite a few posts, on this site, concerning this. Thanks all.
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Old 01-19-14, 02:56 PM   #12
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A good precautionary measure is to buy the hose and grommet. All the heat exposure makes these once flexible fittings brittle so no sooner than you get it out, you'll find broken pieces of he grommet and a split hose.

Of course, don't do start this on a Saturday past 4 pm. Do it on a weekday early in the morning so that after your string of swear words, you call the dealer and hopefully find it is in stock for immediate pick-up.
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Old 01-19-14, 03:28 PM   #13
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I would recommend treating the grommet with something to soften up the rubber (or whatever it's made of) for a day or so, to prevent the breakage upon removal
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Old 01-19-14, 04:03 PM   #14
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I had that happen with mine too come to think of it.. Had a bit of an "Oh s--t" moment when i pulled it out and it broke in half with only a little sliver holding the top and bottom half together.
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Old 01-20-14, 12:40 AM   #15
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Default One more fix to add to the list

As I have had to add power steering fluid twice to my LS since my purchase 6 weeks ago I'm going to add this to next weekends to do list.

Thanks again everybody... <--As this might be getting old... not only do I truly appreciate all of this advice, I'm also trying to hit my 30 posts in 30 days.

Sammy
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