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streetxtreme

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  • Lexus Model
    sc400

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  1. ok, so i thought i should follow up. i SOLVED THE PROBLEM after replacing all the rubber lines and clamps, 2 power steering pumps and a steering rack the problem with the foam was the inlet tube seal the metal inlet that is attached to the pump with 2 12mm bolts on the side there is a rubber seal in there that hardened up and was sucking in small air bubbles with the fluid from the reservoir. therefore causing the foam how did i confirm that? i had a air blower and blew air near the inlet of the power steering pump and guess what i saw. it was lots of air rushing out the reservoir this was with the car off of course so there you go. if anyone has a foaming problem with thier pumps, check that inlet seal first its a 10cent part i've spent about 500 so far but oh well, you pay to learn
  2. i found myself in the same situation i just bought my car with a broken rack i replaced the rack then i realized that the car's power steering pump is dying because i would have to rev up to get power to the steering so i replaced the pump with a used one which then blew the power steering high pressure line i got my line repaired by a hydralics place they reused the fittings and the restrictor thats in the line after i installed the line, i would never be able to bleed the system i would bleed it til there were no bubbles, but as soon as the engine was started, foam would start to build up in the reservoir i thought it was the pump again so i replaced it with a rebuilt one same foaming problem so i thought it was the reservoir being clogged up, so i gutted the reservoir. same thing before the line went, there was never a foaming problem we inspected the line and realised that it was a little to short and thinner than the original i will be bringing it back to have them redo the line i believe that the line has too much restriction causing the atf to be over heated in the pump causing the foam hope i am right
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