SLS driving me nuts

[Racing]

AS you know i picked the "new" astralsilber 92 16V up.
Have spent a little time working it over to make it pass our TUV.
Indeed...the work as payed off,and by now it´s a remarkably well running car...even with the KE i installed.

Now..when i bought the car the ASD lamp didn´t work and so on...
When i got under it,the "reglerstange" for the height adjustment valve was broken,and some idiot had strapped it back on in false position with common steel wire just to make it stay in place i guess.

So...picked a new one up and installed it.
After i did...i´ve had a pulsating force in the hydraulic system of the car that makes this "ploing" sound for every cycle it goes through,so..i thought that it would be air trapped somewhere OR that the adjustment valve was broken(spring loaded "uberdruck ventil" for instance).
So..i changed the reglerventil without any change in beaviour of the car/sound.
Funny thing is that the rear suspension works just as it should and the ride is as good as it´s supposed to be.

Now,both the automatic gearbox and the rear axle are mercedes "tauch aggregate",and somewhere along the line the idiot that installed the hydraulic pistons for the ASD installed the passenger side one in the wrong direction making the air nipple point backwards/downwards.
This of course means that it has been impossible to get air out of the ASD system.
So..i bridged pole 8 and 10 in the ASD relay socket after having made up a new hardline for the hydraulic cylinder of the passenger side..and went for the air nipple...and out came...nothing.
Turned out that one of the hardlines was full of dirt.
So..assembled it all again..hit the airnipple...and VOILA...oil.

Down the car came...out the door..."ploing,ploing,ploing...."
Ok.

So..back in the shop with teh car again..and hoisted the rear of it up in the air.
Unhooked the "reglerstange" and de-areated the system according to the book this time.
"Regler fullen...regler leeren"...for approx a couple of minutes at each end...
Nope..still that sound..

So..bridged the ASD relay socket again...and...
Here´s the funny thing.
When in "fullen" the sound goes away.
..and with the ASD socket bridged..it goes DEAD SILENT.

Ok..now..the system was silent..so..down the car came,and out the door..
I´m a happy camper...and...ONE hard hit on the brakes..."ploing,ploing,ploing..."

GAAAAAAAHHHAAAAAAAAA!!!!

Now..the thing is...when i bought the car the ASD lamp at the instrument was disconnected.
I connected it again..and the whole thing worked,just this sound.
Now...now you can make the ASD lamp light up by simply mashing the throttle hard!!! IN NEUTRAL!!!

Tomorrow i´m going to take the " ASD magnetventil" down that´s behind the front right tire...take it apart as far as i can to see what´s at fault,because it HAS to be something within it that it acting up!!!

Any ideas would be greatly appreciated as i´m trying to get to understand this SLS/ASD stuff..

Jesper

[Racing]

Btw.
At least i´ve got a well working sperr differential now

[Chris Martens]

Jesper,

as always: thanx for the writeup.

Your problem sounds familiar, a bad ASD accumulator produces this repeating ploing, it's a common fault.
Even the pressure hose from the pump to the hardline will pulsate with every ploing, doesn't it?

good luck,
Christian

[Racing]

Yes.Exactly.
What i did was release the slightest of tension on the bolt for pressure testing and the "ploing" went away.
IOW..now its working as it should.

Thanx Christian..i suspected that.

[Dragon]

Hi, ich habe auch dieses Ploing bei mir, und das nervt gewaltig! Das geräusch kommt von rechts, der Hochdruckschlauch an der Asd pumpe pulsiert zu dem Geräusch, und wenn man den Niveauregler anfasst dann merkt man an dem auch etwas immer son Tick, dann wenn das geräusch auftritt. Ist bei mir allerdings nur bei warmem Motor und tritt momentan im Winter nicht auf, außer auf der Bahn. Ich hab das bei mir auf den defekten Niveaudämpfer geschoben (innere undichtheit o.ä.) aber hier hört sich das anders an, kann leider nich so gut englisch...

viele Grüße!

[Rouven036]

hi! deine beanstandung trifft genau auf das auch von jesper (racing) beschriebene problem zu.
chris martens schreibt hiezu fogendes:
ein defekter asd druckspeicher ist die ursache fuer dieses wiederkehrende "ploing" und ein bekannter fehler.
die (hydraulik-) hochdruckleitung die von der pumpe an die rohrleitung geht muesste ebenfalls bei jedem "ploing" pulsieren.
btw. der asd druckspeicher sitzt mit dem asd regelventil im rechten vorderen schwellerendstueck,d.h. musst die radhausschale ausbauen um den druckspeicher zu tauschen.den gibt es einzeln.
teile: druckspeicher: 1245530010 1x
dichtring : 0199977048 1x

[Chris Martens]

cool,

jetzt werden meine Beiträge schon ins Deutsche übersetzt.

Dragon,

ganz recht, ein neuer ASD Druckspeicher wird das Problem beheben.

bis denn,
Christian

[Rouven036]

haha klar gutes training für mich....

[Racing]

Chris.
There has to be a first for everything doesn´t it?

Speaking of something completely else...DAYUM i´m impressed by the general condition and state of the new astralsilber 92...
Going to be a downright joy cutting it up to become what it´s not though.

Fast....

[Henger]

cool,

jetzt werden meine Beiträge schon ins Deutsche übersetzt.

Na ja, ausgerechnet auf einen Beitrag von Jesper hier auf dem Board in Englisch zu antworten, der versteht besser Deutsch als manch anderer.
Wollt ich nur mal so erwähnt haben

Gruß Fränk

[LUDE]

Chris.
i´m impressed by the general condition and state of the new astralsilber 92...
Going to be a downright joy cutting it up to become what it´s not though.

Fast....

Hi Jesper,

are you sure that the your new car is astral silber?
It is from 1992 so it must be brilliant silber!

735 is astral
744 is brilliant

[Racing]

Oops!
You´re correct Lude,cause the chassis tag indeed says 744.
Didn´t even know that the 16Vs were made in that colour?

Did the 744 replace the 735 for 92?

Here´s the story.
Found the "buildsheet" under the pass seat.
Car rolled off the line @ 13.35 on the 28th of june 1991-which according to my knowledge would make it an early 92 model?

Chassis number is 2010351F 880311

Options say
221
240
260
261
751
869

..and written by hand to the left on the buildsheet it says
"Sport".

[Racing]

Frank..you´re right..what can i say
Actualy...thanx..the lot of you,cause my german is really improving..bit by bit...but as with anyone over 30 can attest to...i get pissed a little by the improvments taking their fair time to be honest..

[London-16V]

I had a similar problem with my SLS, but all i did was flush the system completely and replace the ZHM oil and filter, and bled the system. Its fine now.

But yes, the accumulators/spheres are fairly inexpensive and should be replaced if the ride becomes too bouncy or hard...

[Racing]

Yup.
Up here it was approx 80 euros.
Not the end of the world exactly.

[London-16V]

thats a great price...viva la euro! LOL

[Dragon]

Jaja, son neuer Druckspeicher ist was Feines!!