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Thread: Thrust Arms

  1. #1
    Join Date
    Jan 2006
    Location
    New Milford, Ct
    Posts
    271

    Default Thrust Arms

    After having dealt with clunking noise in the front end, I just finished installing new arms and bushings on both sides. This task is easy as long as you have a pitman puller that will fit in there.

    Followed the commonly given advice on this forum to use 750 bushings.

    No more "clunk". But noticed that the boots on the tie-end rods are torn.
    Another item for the "TO DO" list.
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  2. #2
    Join Date
    Mar 2005
    Location
    Hockinson, Washington
    Posts
    2,499

    Default

    Congrats! I installed new 750 bushings on my thrust arms, and i think i will have to replace another suspension part soon, only im not sure which one :s
    Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
    southwest WA

  3. #3
    Join Date
    May 2004
    Location
    San Joaquin Valley CA
    Posts
    264

    Default What will you do for the torn boots?

    Quote Originally Posted by Kobe Diesel
    noticed that the boots on the tie-end rods are torn.
    Another item for the "TO DO" list.
    Mine are torn and the parts store POS boots just don't seem pliable enough to do anything. What are you going to do on yours?

  4. #4
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    Quote Originally Posted by Kobe Diesel
    After having dealt with clunking noise in the front end, I just finished installing new arms and bushings on both sides. This task is easy as long as you have a pitman puller that will fit in there.

    Followed the commonly given advice on this forum to use 750 bushings.

    No more "clunk". But noticed that the boots on the tie-end rods are torn.
    Another item for the "TO DO" list.

    My 750 bushings lasted a whole 7k miles before shimmying again. I switched to Grunts polyurethane bushings.

  5. #5
    Join Date
    Mar 2004
    Location
    So Cal
    Posts
    290

    Default

    Hey Jon, how long have you had the Grunts in? How are they holding up?
    Last edited by Mendozart; 01-23-2006 at 10:42 AM.

    Greg Mendoza

  6. #6
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    I think about 20k miles. Holding up perfectly. Car drives dramatically different than my sisters '95 530 on 750 bushings, but I like it.

  7. #7
    Join Date
    Jan 2006
    Location
    New Milford, Ct
    Posts
    271

    Default Boots

    Quote Originally Posted by 93 525 Paul
    Mine are torn and the parts store POS boots just don't seem pliable enough to do anything. What are you going to do on yours?
    For the price of new tie rods being reasonable, Im going to change them out for new. In the mean time, I filled the boots up with some grease just to keep some lubrication in there until new parts arrive later this week.
    Support your American Flag Merchant Marine
    No BMW at this time, eyeing a 91 318iS. 00 Saab 9-5, 89 Bronco XLT, 05 Kawi Z1k, 00 Ducati 748S Bip

  8. #8
    Join Date
    Jan 2006
    Location
    New Milford, Ct
    Posts
    271

    Default

    After taking a close look at the front suspension geometry, you will notice it is a trapezoid shaped system. You have the control arm and thrust arm both tieing into the steering plate at two different points, rather than one pivot point as found on other vehicle makes. So where does the strain end up at? The bushings - they will take the beating. The passenger side bushing was squeezing out of the arm in little strips. The driver side bushing was just starting to go.

    Jon K, after your comment on the 750 bushings only lasting 7k miles, I will keep a close eye on them in the miles to come. Being that I only drive the vehicle maybe 6k miles per year it might last longer, but all things do come to an end. Ill keep it in my notes to try the polyeurethane bushings when replacement is needed.

    Thnx.
    Support your American Flag Merchant Marine
    No BMW at this time, eyeing a 91 318iS. 00 Saab 9-5, 89 Bronco XLT, 05 Kawi Z1k, 00 Ducati 748S Bip

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