03 KJ Air in power steering, no leak, no power

Discussion in 'KJ General Discussion' started by Steven Renich, Jan 11, 2021 at 10:45 AM.

  1. Steven Renich

    Steven Renich New Member

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    I have an 03 KJ 3.7 project

    I just replaced the engine and a leaky power steering pressure side hose. The pump and hose were disconnected and sitting in the garage for a couple of months while I messed with the engine.

    When I put everything back together, I tried to burp the power steering and I can't get the air out. I put the front end up and turned the wheel (per the Jeep manual). I also used a vacuum pump. The fluid level doesn't drop and there are no leaks, but there are always more bubbles. And there is no power assist.

    I also pressure tested the system with a hand pump. No leaks found.

    I could replace the pump with a reman unit, or I could replace the reservoir o-ring and the return line. The return line on the original is integral to the cooler, but that assembly is pricey. Can I just cut the hose crimps and replace the hoses?

    Any suggestions would be helpful particularly in diagnosis before I start throwing parts at it.
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Definitely sounds like air is still entering the system somewhere. When front wheels were off the ground, did you try lock to lock like 25 times?
    Are you using ATF+4 in the PS unit?
    I wouldn't be cutting the return line hose.
     
  3. Steven Renich

    Steven Renich New Member

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    Oops - I just noticed that I posted this in the KK General Discussion, It should be in the KJ forum. Sorry.

    I tried lock to lock many more than 25 times. I am using power steering fluid.

    From the Jeep manual "CAUTION: Use MOPAR Power Steering Fluid or equivalent. Do not use automatic transmission fluid
    and do not overfill."

    I would really like to figure out where the air is getting in.
     
  4. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    No worries, moved now to KJ Gen Discussion.
    I think the next move is to install a new pump.
     
  5. Billwill

    Billwill Full Access Member

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    Last edited: Jan 12, 2021 at 9:49 AM