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#1
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SLS LEVELING SUSPENSION question
well, First of all I want to thank you for any kind of info you can give me.
Related to the rear suspension of the 2.3 16valve, If you drive by a bump, the car bounces up with a lot of preassure. Donīt know if not moving the car for about 8 months has something to do. With the car running, I turned the bleeder of the suspension on the back a little, and foam (like sea foam) came out. When I did this the car fall down, and when I closed the bleeder, went up again. I was making sure the system was not blocked. I donīt know if changing all the fluid could help. Originally if Iīm not wrong fluid is tellus 10 but seems to be last owner added red transmision fluid. Is there probably air in the system??? Am I suspecting correct?? Last edited by djjeant; 08-18-2004 at 06:49 PM. Reason: incomplete |
#2
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Not air, but rather nitrogen.
Sounds like you accumulators have headed south...permanently. They need to be replaced, then you need to completely flush the fluid and change the suspension filter. Use only the MB hydraulic fluid. This and antifreeze are the only MB only fluids I use. Since someone apparently used ATF, you will probably want to run an extra quart through the system to ensure all the ATF is flushed out. Normal flushing takes approximately 2 quarts...plan on using 3. A search of the past posts should bring up a how-to on flushing the suspension fluid.
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#3
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The gasket on the pump was changed so I think some air got in the system.
In the reservior there is ATF red fluid, but when I went to the bleeding nut at back, MB original fluid came out like foam!!! Isnīt this fluid supposed to recycle? they are not mixed. Is the ATF fluid keeping down the MB fluid??? Last edited by djjeant; 08-18-2004 at 07:57 PM. |
#4
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The MB hydraulic fluid is kind of green, once in the resevoir bottle it looks much darker. If the fluid is coming out of the bleeder screw at the leveling valve it is most likely nitrogen permeating through the diaphragm material. I know when my accumulators were shot my fluid came out looking like sea foam.
I think the pump is low pressure/high volume. When the motor is runniing, with the resevoir cap dipstick out you can watch the fluid flow into the bottle. It runs like a slow tap and the fluid sort of falls into the strainer filter. If the car rises and lowers quickly when you manually move the lever on the leveling valve, that is another sign of blown accumulators. Mine did the same. Afer replacement I could still manually raise and lower the car, but it was at a slower rate.
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#5
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hey thanks alot.
Sorry but my english isnīt that good. I donīt really know whatīs happening but, when I turned the bleeding nut, the car went down, and when I closed it, it went up again slowly. I only let the fluid out for 2 seconds. After this, the car felt better than before but not perfect yet. Should I flush the whole system? If so, try to specify because of my english Thanks again |
#6
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Change the nitrogen spheres, also known as accumulators. Flush the system completely using only Mercedes hydaulic fluid. Use approximately 3 quarts of fluid.
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#7
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MIKE thanks again
I want to make sure the cells are broken, because over here in south america colmbia, the cells cost 500 dolars each so, if I proof they are broken, I could have someone in the us buy them for me.
One more thing: The pump was dissasembled and put together again. Is there any chance something else is wrong besides the acumulators????? |
#8
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When bled through the back valve, what does the white foam mean??
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#9
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Mike has told you the white foam is the nitrogen in a blown sphere. The white foam happens for the same reason that soda foams when you swish it in your mouth. You most definitely have a blown sphere; you will have to disassemble to figure out which one. You need to replace both, however, unless you want this to happen again in October.
__________________
Don't ask me, I'm a shop-owner by default |
#10
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La espuma blanca significa que los esferas del nitrogeno son malos.
The white foam means the nitrogen spheres are bad (so others don't have to jump to their free translators )
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#11
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thanks again
The system is suppossed to recycle, right? how come there is no foam or clear oil in the reservoir??? |
#12
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Doesn't recycle; levelling valve will release some fluid back to the reservoir only if suspension is too high.
__________________
Don't ask me, I'm a shop-owner by default |
#13
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Correct, the fluid circulates (recycles) but by the time the fluid returns to the bottle there are no bubbles. Well, at least I never saw the bubbles there...only at the bleeder screw. I think the nitrogen is trapped between the spheres and the valve.
Again, if your fluid is not clear and clean you need to change the fluid and the strainer filter (mounted in the bottle).
__________________
Mike Tangas '73 280SEL 4.5 (9/72)- RIP Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum. |
#14
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thanks again
I think I will have to buy the cells, one more thing.................. The system is suppossed to recycle, right? how come there is no foam or clear oil in the reservoir??? It seems to be, the fluid has not been changed for 19 years, there was a leak in the hose at the pump, so last owner put ATF in the reserviour. As I bled today I found the fluid is between white and clear (foamy though). |
#15
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It does not recycle. The nitrogen is basically encapsulated in the rear lines, and released slowly enough by the levelling valve that the bubbles are dispersed.
__________________
Don't ask me, I'm a shop-owner by default |
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