How hard to tighten rear of anti-roll bar?

J

johanaxelson

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That is the long screw with four red rubber bushings at the rear:

http://www.sehlin.com/cscoupe/tech/autobooks/chapter9/autobooks_manual_097.htm

I have no idea as to how hard to tighten them and have not found any info. Is it too hard when they start to deform?


Also, how straight are yours? Is the picture indicative?

Mine is at a bit of an angle and the bushings don't fit anywhere near as neatly into the holes.
 
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The bolts connecting the roll bar to the trailing arm should be vertical or close to it. I don't think it is a critical requirement...a few degrees off vertical isn't going to hurt anything. I tightened the nuts just enough to make the bushings deflect a little. Again, not a critical thing. Dumb question: is the roll bar from another coupe? Not sure if there were differences in roll bar geometry/sizes between Coupes, Bavarias, 3.0 Ss. Perhaps that is an issue?
 
interesting question !

but no idea of the answer, i was prepared to do that work, because my bushings were almost destroyed, but i have not considered this issue:confused:

remark: the picture you present is from the FRONT ASSEMBLY, not the rear one, take care, maybe there is a different angle in the rear !
 
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The The preload on the link bush is around 15, the main bar bush- 35 according to what other cars are.( E24, etc.)
 
thanks 61porsche. but since I am a bit of an idiot I am not 100% sure what the means :) Does it mean it is under tension for x kg?

@dQ - by rear I meant rear of trailing link. Not car.

@bill - good question, it came with the car :) Not sure how to tell it is original. Would need exact measurements for that I guess.
 
The 15 and 35 refer to torque in lbs. This isn't a lot.

Early coupes did have a smaller diameter bar - 17 IIRC, vs 23mm.

Im pretty sure the Bav front would work, but the Bav rear has a wider track.

If I misunderstood what you're trying to make sure is tightened correctly, please by all means let me know and I'll do my best to answer if I can.
 
No no, that is great thanks, I was just not sure about the term pre-tension as I know some things do need to be but under pressure while mounting. I.e. never really at rest.

What I am trying to tighten is the long screw that is in your pic as well with the 4 rubber "cushions".

And yes, I think it was 17.
 
I would suggest that the front bar be tightened a little more than the rear bar figures I quoted. Add 5lbs torque.

I'd also suggest you find a used 23mm bar which should make a difference you can feel in cornering.
 
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