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Threads in aluminum rack damaged by corroded steel fitting; what to do?

One of the small lines on the steering rack failed due to corrosion. The new lines will be here later this afternoon via UPS.

Removing the old lines involves dropping the rack down after disconnecting the two large lines as well as the steering column. All of that went well enough as did three of the four small fitting on the steel lines.

The fourth fitting did not want to come loose. I soaked it for days with no joy. Today I cut the line at the fitting and put a six point socket on it. It came loose but remained very tight in trying to remove it. I tried additional PB Blaster and then screwing it back in a bit before trying to unscrew again it but nothing was working.

When I finally got it out I found that there had been a rust build up on the end of the fitting and it damaged the threads all the way out. The rack is aluminum and the fitting is steel.

I cut another fitting off of the old line and cleaned it up. I can screw it in as it is apparently following what little remains of the threads in the rack.

I did not attempt to see if it will tighten up. I figured I probably have one shot at tightening the new fitting and did not want to do anything to lessen the chance of getting the new line tight enough so as not to leak.

Anybody have any thoughts on what I might do to increase my chances of getting the new fitting tight enough to prevent leaking?? Do you think teflon tape would be advantageous? I also thought about a few wraps of aluminum foil as a way to decrease the diameter of the hole now that the threads have been damaged.

Any ideas will be considered.

Thanks, Randy








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    New lines in place

    Thank you for all the replies.

    I decided to try the easiest route first and that was the teflon tape. After checking the damaged threads it was the crown of those threads that had been knocked down rather than torn out.

    I did a wrap of tape on the new fitting and installed it. The fitting screwed in and tightened up to a point I was comfortable with.

    I did a quick start up and bled the power steering circuit and there are no leaks at this point so I am calling it job done.

    Randy








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    Threads in aluminum rack damaged by corroded steel fitting; what to do?

    A tough spot. If I were in your shoes I'd probably take a shot at it with some high strength thread locker. I'd clean both the fitting and it's mate with acetone, and make it the first fitting assembled. I would also not move on until it had cured. The real trick will be how much to tighten it. Better to be a little under than a little over, I'd say. It's the O ring that makes the seal.

    Good luck with it, Peter








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    Threads in aluminum rack damaged by corroded steel fitting; what to do?

    I took a look at the rusty lines on my rust belt car and punted: got a rebuilt rack for some $225 instead of screwing around with those rusty fittings. Life is too short...








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    Threads in aluminum rack damaged by corroded steel fitting; what to do?

    The seal isn't made between the fitting and the housing so you can install a helicoil (or some such thing) and it will be better than new. Be careful not to damage the seat where the flare seals. Failing that, Loctite makes a thread 'restoring' kit that works at least once, most of the time.

    Greg








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      Threads in aluminum rack damaged by corroded steel fitting; what to do?

      Thank you for your reply. I would be afraid to try to install a helicoil because the seat in the rack could be damaged in the process of drilling the opening oversize to accept the helicoil.

      I am unfamiliar with the Loctite product you reference. I will look into that, thanks.

      Randy








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        Threads in aluminum rack damaged by corroded steel fitting; what to do?

        A quick google brought up
        http://www.henkelna.com/product-search-1554.htm?nodeid=8797876355073 .
        I don't believe everything I read online, but this held my cam chain tensioner bolt until I got home from California.

        Greg







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