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KY350

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  • Lexus Model
    LS400

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  1. See http://www.lexls.com/tutorials/lubrication/oilchange.html for explanation and pics
  2. Time to conclude this little sqeeling noise. I had time to check my rear brake pads again. Took off the outside pad on the left rear of the car and while the pad material is low, its still useable. In fact, I noticed that there is a metal wear indicator on the pad and the pad material was still a couple of millimeters above the wear indicator. When I checked the inside pad, I noticed that the pad was worn down to the metal indicator tab and the tab was freshly worn. However, the pad material on this inside pad was as thick as the outside pad, which was still 2mm away from the wear indicator. So I simply pushed the metal wear indicator tab on the inside pad back away from the pad surface by approx 2mm to even it up with the outside pad. Reinstalled pads and test drove the car - no noises. Summary - if you have a constant squeeling noise on acceleration / desceleration, turning left or right, then check your pads as one or more are likely worn down to the metal wear indicator tabs, which cause a horribly loud squeeling noise to notify you to change pads. BTW - does anyone know what the thickness of a new rotor for a 91 LS 400 is supposed to be (front and rear)? Also, what thickness on a worn rotor would be considered out of spec and necesitate replacement rotors?
  3. Thanks for the response nc211. I've had the car for 2 years and not replaced the rotors or the pads in that time. I think i'll take the car to the mechanics shop for a diagnosis as I cannot even tell if the noise is coming from the front or rear left of the car.
  4. I'm getting a squeeling noise coming from the left hand side of the car. Due to Lexus noise insulation, I cannot hear the nosie when the windows are up. But when the windows are lowered, I can clearly hear the noise and it occurs at low speed, higher speed and turning left or right. I checked the brakes last weekend and while the pads are lowish on material, they are still useable. So I don't suspect any noise from the pads. All the wheel nuts are on tight. It doesn't sound like a wheel bearing noise either as that is usually a growning type of noise and this is a high pitched squeel. Any ideas on what may be causing the noise?
  5. Thanks for the response 99lsguy. Last Feb I was going to do the PS fluid flush following the tutorial that appears on lexls website. However, my RHD model does not allow easy access to the inlet hose (have to remove several other components to get to the reservoir inlet), so I simply sucked out fluid from the reservoir and topped up with new fluid. Repeated about a dozen times and called it a day. This time however, I will take the car to the mechanic and have him do a complete flush and see if that gets rid of the groaning noise.
  6. Well I have the exact same problem as choiboyogg. I get a slight groaning noise when I turn the steering wheel to the right and slightly less so when turning to the left. I check the power steering fluid level which was at the low mark with the engine cold. So I topped it up to the high tide mark with ATF and the noise was still there. Then I removed the power steering fluid resevoir cap and looked for bubbles in the fluid when turning the steering wheel. I could not detect any bubbles. Continued turning the steering wheel right and left, then took the car for a short drive. When I got back home, it was still making the same noise so again I removed the resevoir cap and turned the wheel. After all that, the noise still persisted. Could it be a problem with the actual power steering pump?
  7. Sounds like you are doing everything correctly to get the best mileage out of the car. One thing that I have noticed is that my mileage suffers by at least 10% if I run the air conditioning system continuously. So my suggestion is to only use it when needed to maximise your fuel economy. Futhermore, try to us the air conditioning system at least a couple of time a week, even if just for 10 minutes at a time. This will ensure that the air cond system remains in good working condition and you will avoid regassing / leaks in the future.
  8. I've had my 91LS for 2 summers now. Last summer I did not notice any discrepencies with the AC system, but this summer I have noticed that only the passenger side centre vent (that would be the driver side centre vent in the US models) is the only vent that blows cold air when I have the upper air vents selected. The other three dash vents seem to blow air that is significantly warmer than the passenger side centre vent. Is this normal? Furthermore, when I select the foot / upper vents button, the both the centre dash blow cool air and the side dash vents / foot vents blow warmer air. No I have read that the side dash vents are considered part of the "lower" air conditioning vents and are designed to blow ait that is approx 20F higher than the centre vents. But I cannot understand why cold air will not blow from all 4 vents (or at the very least from both the centre vents) when the upper dash vents are selected. Any suggestions?
  9. maniek LS - lift up the bonnet and you will notice that on the underside of the bonnet there is some insullating material. This became lose at the front and flopped over the air intake, blocking / reducing the flow of air to the plenum, causing the above mentioned problems.
  10. Yep - my 91 4 spead holds each gear just that little bit longer in the mornings for the first few minutes untill all the fluids at at optimum operating temperatures.
  11. Aside from generating more posts for yourself, what exactly is the point of this post????
  12. You can add either coolant or water as the amount that you would be adding would be so small as not not have a great effect on the ratio of coolant to water (ratios can vary anywhere between 50:50 and 70:30 coolant - if you live in a freezing environment, then go for the 70:30 coolant ratio). If the coolant is very red you are safe to just add water. If the colour is a light red / slightly pinkish, then add coolant. Actually, your coolant looks quite red, so I'd just add water. Also, I don't like to mix different coolants when I don't know the original coolant formulation.
  13. Not sure that my response will be of much value to you as I am in Australia. But I paid about $30 (approx USD 22) for a 5L (approx 5 quarts) bottle of red. I purchased it from an auto store, not Lexus / Toyota, who I suspect would have charged a little more.
  14. Wow! Can you please expain how does this procedure adjust the footbrake? Sure beats jacking the car up and taking wheels off.
  15. Go here: http://www.lexls.com/tutorials/brake/fbpad.html See picture 5 onwards for shim plates. Note that there are 2 plates per pad.
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