Question about 1991 Lexus LS 400

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1990 Ls 400

I have a 1990 Ls 400, my drive belt popped yesterday. I pulled into a gas station to try and get a new one. they said that one of my pulleys is not turning. I'm trying to figure out what this piece is called...they said its a dealer's item. Its the Pulley that connected to the fan clutch housing with four bolts. its the only pulley that doesn't have the grooves in it. I couldn't find a diagram for it..can someone help me out...thanks

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That should be your tentioner they have bearing's that go out

Posted on Nov 25, 2008

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Try lexls.com. This site has awesome tutorials with pictures for each repair step. I believe there is a tutorial for the drive belt repair as well.

Posted on Sep 22, 2008

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1 Answer

My 1990 Lexus LS 400 made a loud pop noise and now seems to have less power??/


It is really hard to say what this could be, please have the dealer or a shop that knows this make and model look at the problem.

Jun 17, 2012 | 1990 Lexus LS 400

1 Answer

I was driving my 1999 Saab 9-5 today, it was raining, right after going through a puddle, my power steering stopped working, the battery light came on, so I pulled into a gas station, turned the engine...


LOL, nooooooo. You didn't hurt anything. In fact, you identified a problem by going through that puddle. You need a new serpentine belt and/or tensioner pulley. It sounds like the spring in your tensioner pulley may be worn, and not pulling your serpentine belt tight enough. Now, THAT being said, there MAY be yet another issue going on. While I don't doubt for a minute that you need 1) a new serp. belt, 2) a new tensioner pulley, and 3) a can of belt dressing, you may also want to check (while the old serp belt is off during the changing) that all your pulleys are spinning freely. Especially your AC compressor pulley. If your AC is low on refridgerant, it can lock up the pulley. The serp belt drives your power steering pump, your alternator, your AC pump, water pump, etc. If one pulley siezes up, the tensioner is weak, and the belt gets wet, NOTHING will turn. Hence the dead battery (alternator not turning), no power steering (pump not turning), and more importantly no coolant circulation (water pump not turning), which can cause serious overheating problems.

Nov 04, 2010 | 1999 Saab 9-5

1 Answer

The serpentine belt on my 1990 Lexus LS400 snapped. Does this belt have anything to do with the water pump?


Yes it runs the water pump,the car will over heat almost as soon as the belt breaks wile driveing down the road.Thanks for using Fixya.....Ray

Jun 22, 2010 | 1990 Lexus LS 400

1 Answer

Front strut replacement 1990 lexus ls 400


u will need to remove tires and support car on jack stands under the hood u will find three nuts holding the strut up u can only pull strut off once u hav removed all other bolts from below car... go to auto zone.com and look up repair manuals they will be free after u sign up which is also free

Apr 21, 2010 | 1990 Lexus LS 400

1 Answer

What size gas tank does 1990 lexus ls 400 have?


Fuel tank: 22.5 Gls.

More details in Lexus LS400

I hope helps with this (remember rated this help) Good luck.

Jan 04, 2010 | 1990 Lexus LS 400

3 Answers

My 1990 Lexus LS 400 stalls unexpedly (at any speed).When put in neutral, it starts up and runs fine for a few minutes then stalls again. Why?


Your fuel pump or fuel pressure regulator are not supplying constant fuel pressure. Too much or too little is causing it to kill. You can pull the vacuum line from the regulaor and check for gas. If there is none, you need a pump, it is weak.

Sep 05, 2009 | 1990 Lexus LS 400

1 Answer

1990 Lexus Ls 400. What tempture is my car suppose to run at?


your car should not be near that, it should stay at the middle line or a little under. You need to keep an eye on your radiator fluid level. I just changed the radiator and thermostat in my wifes car. DO NOT DRIVE YOUR CAR IF ITS RUNNING THAT HOT, IT WILL BLOW YOUR MOTOR!!!

Jul 25, 2009 | 1993 Lexus Ls 400

2 Answers

Belt replacement


there should be an idler pully, one that doesn't drive anything mounted to a flat black bracket that is then bolted to your engine. That pulley has a 14 or 15 mm nut in the middle of the pulley. loosen it, but don't remove it. Behind the pulley on the bracket is a small bolt head. that will loosen the pulley shaft, allowing you to remove the belt. The bolt also may be on the underside, but it's there around that pulley on the bracket. Also be careful the bolt isn't seized, if it snapps you will have a very hard time getting the tension back on the new belt. You may want to spray it first when you find it. You may also need to remove another belt if there's one infront of it, like an a/c belt or alternator belt, loosening the alternator to remove the belt. It's very tight, and it may help to remove the wheel and plastic inner fender sheild, using a pair of needle nose pliers to gently remove the pop snaps.

Dec 14, 2008 | 1990 Acura Integra Hatchback

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