trailing arm bushes

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garyinwestoz
Posts: 390
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
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trailing arm bushes

Post by garyinwestoz »

1980 528i
since the previous inspection report said that the trailing arm bushes were perished, I set about changing them.

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Using the FAQ quide http://www.firstfives.org/faq/trailing_ ... g_faq.html I got the required parts together and set about removing the trailing arm.
I got 4 boxes of bushes from FCP Euro @ $15 each

Because this sort of as simple thing to do, it naturally led to bracket creep - ie R + R to: sway bar, trailing arm and half shaft boot.

Removing the trailing arm as per the guide was fairly simple and took maybe 45 minutes to remove - the most difficult part being to remove the lower spring from the hand brake assembly to pull apart the assembly and release the hand brake cable ( I left the cables attached to the car) from the back of the hub.

I used an old brake line to direct the dripping black fluid. There was quite a build up of grease and dirt near the inner bush bracket, from the split half shaft boot. I had better fix that up as well.
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Comparing these old bushes ( 3 x old on left - new on right) , seemed to me to suggest there were still in fairly good condition - except for the outer rib which was perished.

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Installing the new bushes was interesting in that the initial flap wanted to bend over and , which tended to make the whole bushing a bit fatter and thus need more force on the ratchet to turn the bolt. I tried fish oil as my first lubricant, which worked part of the way, Dishwashing liquid, worked so much better on the 2nd bush!

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The railing arms was looking rather rusty, so I cleaned it, then sanded it , then treated with rust converter, then sanded it again, then sprayed some cold galv primer, then brush applied epoxy enamel - which I didn't like the finish of , so then sprayed some flat black paint over. All this took 3 days, mostly waiting for the paint to dry - epoxy enamel required min 16 hrs!

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Once paint was dry and I had cleaned up the car underbody a bit more, including removing the half (drive) shaft- which had a split boot, I set about reinstalling the trailing arm.

Wasn't too hard, but the bushes created a bit of offset to the brackets, which need some forceful banging to get them in - so took maybe 15- 20 mins of mucking about till I could finally get t 3 bolts back in ( 2 tailing arms bolts and 1 spring strut bolt). I then set about reinstalling the hand brake components (I had cleaned them by then) - that lower spring is a real bugger to get in. then reinstall the brake disk ( removed a couple of times to adjust the hand brake adjuster, until I got enough free play on hand brake - renutted the the hand brake cable at the interior, the reinstalled the caliper , pads and retainer clip , and brake lines, then wheel.

All looks good now.

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I've left the sway bar connection off until the other side is done
74 525 auto
76 525 - 4 speed, LPG and holley carb- restoring
77 528i- 4 speed manual
77 528i -4 speed manual getting rusty
79 528i auto - a SA car?
80 528i auto - ready to relicense
81 528i +3.5ltr - auto - restoring
86 525e 5 speed manual- dd
canada karl
Posts: 1058
Joined: Tue Jan 06, 2009 3:50 pm

Re: trailing arm bushes

Post by canada karl »

Well done. Looks great. :D
1976 530i. BMW 59 Triumph TR3A(rolling resto). 67 Triumph TR4A(salvageable). 86 900S Winter car
garyinwestoz
Posts: 390
Joined: Thu Jan 29, 2009 9:05 pm
Location: perth, australia
Contact:

Re: trailing arm bushes

Post by garyinwestoz »

The other side was of similar procedure.
Trailing arm was quite dirty - so cleaned, prepped and painted that as well.

trailing arm after a bit of wire brushing

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After sanding, priming and painting
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rubber bush installing - liquid dish soap made this a a sinch
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Arm with new bushing installed - this took a while, as the bushes offset the arms a little, so a bit of squeezing was needed - I used a clamp to pull the arm into the crossmember bracket

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After reinstalling the trailing arm, I noticed that the fuel pump hoses were all cracked - so I took the whole fuel pump assembly off to replace hoses and also clean the underbody too.

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Fuel was not good on the freshly painted trailing arm - kinda dissolved the paint !, so im going to have to try and repaint that now .

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fuel pump and underbody all cleaned - makes quite a visual difference being able to see the underbody, pump and bracket colours.
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74 525 auto
76 525 - 4 speed, LPG and holley carb- restoring
77 528i- 4 speed manual
77 528i -4 speed manual getting rusty
79 528i auto - a SA car?
80 528i auto - ready to relicense
81 528i +3.5ltr - auto - restoring
86 525e 5 speed manual- dd
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