Question about 1991 Lexus LS 400

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1991 ls400 has oil leaking from power steering reserv, how can I tell if oil is leaking on to alternator?

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Posted on Jan 02, 2017

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SOURCE: 1991 lexus ls400 power steeing slowly got hard to

Check the power steering fluid level.

Posted on Nov 11, 2009

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SOURCE: 1991 ls400, after replacing power steering pump,

may need a code put in for the computer to work

Posted on Dec 13, 2009

  • 37 Answers

SOURCE: I have a 1991 ls400. The power steering is

Check out the 2 lines that run from your power steering pump. With the engine running try moving them, and look for fluid leaking around the end of the hoses, you will probally find one of them leaking at the fitting. Of course be careful with the engine running, do not have any rags or anything in your hands around a running engine.

Posted on Jan 12, 2010

  • 20 Answers

SOURCE: I had a new water pump and timing belt put on my

could be the head gasket gone, if you take it to a garage they can do a test on it which will take about 10 minutes, if you are leaking water but not on the floor there is a good chance its going into the exhaust which will cause steam(white smoke) out the exhaust

Posted on Jun 12, 2010

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1 Answer

1990 LEXUS LS400 power steering heavy leak when making right turn. replaced high pressure hose..what's next


Steering gear(aka Rack and Pinion) look for leaks at the bellows boots over the inner tie rod ends.
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May 03, 2015 | Lexus Cars & Trucks

1 Answer

Have a 1992 Lexus ls400 the other night I was driving home and it took awhile for my heat to get hot in my car and about 15 minutes of driving I noticed my my heat when cold and five minutes later my...


Sounds like the problem WAS: out of coolant due to a leak. If there is a leak then it may not develop enough vacuum to pull coolant from the reserve reservoir. Did you open the radiator cap and look?
The problem IS: you need a new engine (or car). See a mechanic to confirm before doing this.

Feb 10, 2015 | Lexus Cars & Trucks

1 Answer

How to tell if power steering oil is leaking on alternator 1991 ls400?


You can get a dye to put in the power steering reservoir it makes the fluid glow

May 17, 2014 | 1991 Lexus LS 400

1 Answer

Where is the alternator located on a 1991 ls 400


The main purpose on an alternator is to recharge current back to the battery. One of the most common problems with the Lexus LS400 and SC400 is that power steering pump seal leak. Right below the power steering pump is the alternator. The power steering fluid will drip down and cause many electrical problems for the alternator. Therefore, its very common to have the alternator go bad along with the power steering pump, just be sure to check.awcforever.gif

Mar 07, 2011 | 1991 Lexus LS 400

1 Answer

I had a new water pump and timing belt put on my 1991 lexus ls400, but i see white smoke coming from the tailpipe and when i put coolant in the reserve tank it leaks out but not on the ground. Can someone...


could be the head gasket gone, if you take it to a garage they can do a test on it which will take about 10 minutes, if you are leaking water but not on the floor there is a good chance its going into the exhaust which will cause steam(white smoke) out the exhaust

Jun 12, 2010 | 1991 Lexus LS 400

1 Answer

I have a 1991 ls400. The power steering is atrocious. I continually have to add atf fluid or stop leak into the power steering chamber. I assume it's a leak--a very small one. Any ideas on what stop...


Check out the 2 lines that run from your power steering pump. With the engine running try moving them, and look for fluid leaking around the end of the hoses, you will probally find one of them leaking at the fitting. Of course be careful with the engine running, do not have any rags or anything in your hands around a running engine.

Jan 12, 2010 | 1991 Lexus LS 400

2 Answers

1991 lexus ls400 power steeing slowly got hard to


As mentioned check ps fluid. If it wines when turning and still no power then the pump is internally bad.. If the fluid is dissapearing fast then its a hose or most likely a leaking rack& pinion assembly..

Nov 11, 2009 | 1991 Lexus LS 400

1 Answer

Ls400 indicator lights coming on


you need a new alternator

Nov 03, 2008 | 1991 Lexus LS 400

2 Answers

Power steering


There is a loud squeak on the front of my 1991 ls 400. The squeak is near the alternator. Any one no what it is?

Aug 15, 2008 | 1991 Lexus LS 400

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