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wierd LSPV noise 90 4Runner

Old 06-06-2012, 05:03 PM
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wierd LSPV noise 90 4Runner

I have a 4Runner in my shop right now with a very strange "knock" noise when the brakes are applied .

blead the brakes . old fluid was nasty !! but now have a "knock" noise in the LSPV . not sure why . any others have any insite into this ?


Very specific , and ONLY happens when brakes are applied .



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Old 06-06-2012, 05:49 PM
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Sure it's not coming from the passenger drum?
Old 06-06-2012, 05:53 PM
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Shop diagnostic flat rate is $50/hr

How bad do you want to know?

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Old 06-07-2012, 06:50 AM
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positive it's the LSPV . I'm going to replace it , I think this is the safest course of action , and then when I have some time , I will disect it to see whats going on

I was just wondering if anyone else had run in to this .. I have never seen this before


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Last edited by slacker; 06-07-2012 at 06:51 AM.
Old 06-15-2012, 02:58 PM
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Re did the brake line in the rear of my rig recently, and had to re bleed the whole system, and got a funny noise from the lspv afterwards as well.
I bled and bled the brakes over and over and finally it stopped. Had to get that last little bubble out of there.
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