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#1
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Is this normal SLS behavior?
I recently joined the cheap wagon club and purchased a wagon that had a new SLS pump - the PO had let the system run dry so I rebuilt SLS valve, replaced high pressure line and added new Mercedes hydraulic fluid (Febi) Upon start up with weight in the rear, the car's rear end rises up and then drops slowly and repeats this 2 more times and then stabilyzes at the right height compensating for the load and maintains height . . . is this normal for the SLS system? Any thoughts, seems like the car needs a few extra seconds to pressurize -??
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#2
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No. Air leaving the system would be my guess.
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#3
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Is there any air in the lines?
How are the accumulators?
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#4
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system is self bleeding, no leaks and accumulators appear to be original and car does rise . . . .might be time to change out accumulators regardless
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#5
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How long ago did you reseal the valve? If it hasn't been too long, I'd give it a few times of being loaded down. There may still be air in the system and it needs to be bled out.
__________________
Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#6
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How does the car ride?
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Current cars: 2000 ML55 AMG, 174k miles 2003 C240 T-Modell, 202k miles 1995 S320, 207k Miles |
#7
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Car rides good though I notice when I come to a stop car lowers and raises . . hey man, I am an official low rider now! there seems to be a pressure loss somewhere. . . .
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#8
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The only thing that can cause the rear to raise and lower like that is the SLS valve. The pump supplies the pressure to the valve but it's not going to change the ride height. Are you sure you got it put back together correctly and/or non of the o-rings got damaged while putting them in.
I reworked the SLS Valve O-ring PDF here it is again. http://oregonstate.edu/~lindgrea/DIY/PDFs/w123_sls_valve_seal_inst.pdf
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#9
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Can you make it junp up and down at stop lights?
__________________
" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century OBK #55 1998 Lincoln Continental - Sold Max 1984 300TD 285,000 miles - Sold The Dee8gonator 1987 560SEC 196,000 miles - Sold Orgasmatron - 2006 CLS500 90,000 miles 2002 C320 Wagon 122,000 miles 2016 AMG GTS 12,000 miles |
#10
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Quote:
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#11
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Accumulators generally cause bouncy or harsh ride. They aren't going to cause the rear to lift and lower randomly. When they go bad the big rubber diaphragm inside tears and the whole sphere fills with fluid. Ride height is only affected by the pump and the valve. I still suspect the valve. You might have a valve that isn't working right.
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#12
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Quote:
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#13
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Quote:
Do you suppose you might have an adjustment problem with the pull rod that connects the SLS Valve lever to the sway bar lever? I don't know this - its just a thought. Joseph |
#14
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Quote:
Summit in the linkage to the valve from the anti-roll bar.... On my Citroen Xantia (Same basic idea, fully hydopneumatic suspension) the valve is connected by a small plastic link that used to pop off its ball-joints... The back end of the car would sink or rise depending on where/what position the valve had come adrift from the linkage.... VERY common fault on Xantias....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... |
#15
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I hadn't thought about the rod from the valve to the sway bar. Definetly check that before buying a new valve.
I've had a couple shops tell me the same thing about rebuilding the valves. A lot of shops don't rebuild parts because it's not worth the money to do it. It's cheaper and easier for a shop to slap in a new part, rather than deal with the headache of rebuilding certain parts.
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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