W108 hydropneumatic compensator questions - Page 3 - Mercedes-Benz Forum

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post #21 of 33 (permalink) Old 03-18-2013, 06:15 AM
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What about me

My problem is similar. I have positive rear camber. I just got my 4.5. While I have the Boge compensator, the car came with the replacement spring installed with one rubber pad. For some reason, I ordered and installed another replacement spring with both pads. It seems the positive camber has gone more pronounced.

My question is if I remove both pads from the lateral spring and I still have positive camber, what would be the next thing to do? Where cutting, torching or locating weaker springs are not options.
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post #22 of 33 (permalink) Old 03-18-2013, 08:37 AM
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Switch out the compensator spring(horizontal) with a dealer one or use a 190D spring. I've read posts that the compensator springs purchased from online stores or non dealer parts stores only carry the heavy duty compensating spring.
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post #23 of 33 (permalink) Old 03-18-2013, 08:39 AM
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we have replaced those compensators with springs for decades , why fight it . this work for ever , the other overprice thing dies quickly .be happy . the ride is same .
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post #24 of 33 (permalink) Old 03-18-2013, 09:08 AM
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Originally Posted by agillot View Post
we have replaced those compensators with springs for decades , why fight it . this work for ever , the other overprice thing dies quickly .be happy . the ride is same .
Can I get confirmation that are 2 types of compensating springs that fit w108's? I have positive camber and have no other problems using the spring instead of the hydropneumatic device..
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post #25 of 33 (permalink) Old 03-18-2013, 09:55 AM
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No you can't, because there is only one type that fits 108s.

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #26 of 33 (permalink) Old 03-18-2013, 03:18 PM
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Here is my 2c worth.
I have a W111 finny with 4.5 running gear in it - so it has the W108 diff and springs. My car sits too high. So I bought a whole W110 190D last weekend - it was sitting level with the correct camber.
W108 hydropneumatic compensator questions-wp_000426.jpg
So I removed the spring and fitted it to my finnie. The spring from the 190 was a different part number to the 108 one. I reckon the car may have lowered by 5-10mm, that is it. So it is still a tad too high. So all three springs must be controlling the height of the rear of the car - so I will need to swap the 2 trailing arm springs over too.
And here is how the 190 loooked with no compensating spring at all.
W108 hydropneumatic compensator questions-wp_000454.jpgW108 hydropneumatic compensator questions-wp_000455.jpg
Lower than correct, though I quite like it. Can anyone tell me what would be the impact on the dynamics of the car if I did not refit the spring? Would it be dangerous to drive, or just lower?
It only took about 15 minutes to change the spring over. You jack the car up and put jack stands under there. Put a jack under the right hand edge of the bracket as shown below, slacken the left bolt a it and take out the right, then lower the jack. Installation is reverse of removal.
W108 hydropneumatic compensator questions-wp_000449.jpg

Quote:
what would be the next thing to do? Where cutting, torching or locating weaker springs are not options.
If you rule out those options, then put 10 bags of cement in the boot.
Cheers,
Drew

Last edited by drew56cus; 03-18-2013 at 03:21 PM. Reason: spelling
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post #27 of 33 (permalink) Old 03-18-2013, 04:25 PM
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Can you zoom out so I can see exactly where you position the jack stands under the car. I can see that both ends of the compensating spring are flat so cutting is not an option. I thought that at least one end of the spring would be uneven. When the car is jacked at the rear is most of the tension on the rear compensating spring relaxed? That would make it less scary to loosen..
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post #28 of 33 (permalink) Old 03-18-2013, 04:28 PM
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Actually, why can't I cut a coil or two on the Comp. spring. All I need is one flat end to hold it steady, right?
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post #29 of 33 (permalink) Old 03-18-2013, 04:43 PM
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Hi,
I put the jackstands under the jacking points in the sills. This is the only pic I have but it doesn't quite show it. When you jack the car up under the body and let the wheels hang, there is not too much pressure on the horizontal spring - so it is easy to control with a floor jack and block of wood as shown in my earlier pic.
W108 hydropneumatic compensator questions-wp_000447.jpg
Both ends of the spring are flat, so if you cut it, the spring may want to come off the mount as it flexes. You could try, but I have my doubts. Maybe you could carve a chunk of rubber as a spring mount like mini versions of the trailing arm spring rubbers? Sounds like hard work though compared to getting a suspension shop to re-temper the spring for you.

Last edited by drew56cus; 03-18-2013 at 04:43 PM. Reason: more spelling. D'oh!
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post #30 of 33 (permalink) Old 03-18-2013, 04:59 PM
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Do you loosen the 2 bolts to the comp.spring bracket first then completely remove when wheels are off the ground?
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