The Kid Posted March 30, 2008 Share Posted March 30, 2008 I have a 93 ls 400... but the alternator is going on it... I am running kind of low on money right about now with a lot of responsibilities to handle... im only 19 but trust me, I have a lot on my plate. so I know someone selling SC 400 parts because the vehicle was crashed, I know that those and the LS have many of the same parts. and I would like to know if I should take the chance and purchase his alternator because I would most likely get it cheaper than a lexus dealer, and want to know if it is compatible with my LS thanks Quote Link to comment Share on other sites More sharing options...
bigste Posted March 30, 2008 Share Posted March 30, 2008 Might save you some money here, read on. You got the same as I had. The problem is a cheap fix. I'm 99% sure your problem is the PAS reservoir O ring, about $2 and an easy fix if you are quick. Next step is the alternator will pack up altogether. Remove the alt and take off the back cover etc and clean it up. Whilst it's off do the O ring on PAS and clean off all the mess. There's plenty of posts of how to do it but here's my version. 1. Disconnect the battery negative. 2. Remove serpentine belt by using a socket and rachet on the spring loaded tensioner pulley. Think it's 14mm and turning anti clockwise will slacken the belt enough to get it off. The tensioner pulley is the one on the opposite side to the battery and it has no grooves on it as it runs on the back of the belt. Whilst the belt is off check the idler & PAS pulley for worn bearings. 3. Remove the cover from under the engine. 10mm I think. 4. There is only one bolt and one nut to get the alternator off (14mm I think). One is undone from above and one from below. Once the nut and the bolt is out you can manouvre the alternator in order to pull out the wiring plug at the rear and then remove the main power wire from the side. 5. In order to get the pump out from below you will probably need to take out 2 small bolts from the corner of the sump that are holding a bracket containg two pipes. You'll also need to remove the bracket from the pipes by taking out 2 small screws. With these pipes out of the way you can just about lower the Alternator down through the gap. The whole job will be about 45 minutes to an hour for a first attempt. If your alternator is very oily suspect your power steering pump leaking which is above the alternator. If you've needed top ups you are advised to sort out the leak at the same time as you do the alternator or your time and money will be in vain. If you find the alternator is full of oil check there is no play in the PAS pump pulley. If if seems ok your problem is likely to be an easy fix to stop the leak. The reservoir which hols the PAS fluid is detachable from the pump and when it's detached their is a small 'O' ring that needs replacing. Here in Spain it costs 1.85€ or £1.50 to you in uk. To change it you must syphon out the fluid first then cover the alt with plenty of rags. There are 3 bolts to be removed plus the low pressure pipe. There is no need to remove the pump. You can find more details if you look round this forum or ask here and I'll give you more details. The part number from lexus or toyota is 90080-30040. I've copied and pasted from a couple of my previous posts but you should get the drift. Quote Link to comment Share on other sites More sharing options...
fiveofakind Posted March 30, 2008 Share Posted March 30, 2008 Have your current Alternator rebuilt.....or exchanged it out for one that is already rebuilt at auto electric shop....I just did that here in San Diego with my 1992 LS400....$150 for rebuilt off the shelf......gave him mine....& he gave me one already rebuilt sitting on his shelf.... Jeff Quote Link to comment Share on other sites More sharing options...
The Kid Posted March 30, 2008 Author Share Posted March 30, 2008 wait, but I need to know how rebuilt alt's work... are they rebuilt by lexus or aftermarket brands? I have looked online for some and I only see aftermarket brands my lexus mechanic always told me that I should go for a lexus alternator and not after market. and to the 1st guy who posted, that stuff all looks like french Quote Link to comment Share on other sites More sharing options...
python Posted March 30, 2008 Share Posted March 30, 2008 who is going to replace it? a friend or shop.........if its a shop then let them get the part for u, that way if its defective they are responsible for fixing it Quote Link to comment Share on other sites More sharing options...
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