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  #16  
Old 08-24-2011, 04:52 PM
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Quote:
Originally Posted by ForcedInduction View Post
Actually constant flow is required. Even slight changes in suspension height (road bumps) will consume fluid since there is no delay buffer as with air suspension systems.
For an electric pump to work it must be 100% duty cycle rated.
The way I understand the system is that the pump is always pumping fluid to the valve in the rear, when the car is running. But when the rear is in a steady state, the fluid being pumped from the pump to the valve is just diverted back to the reservoir. All the pump does is supply pressure to raise the rear. It's not maintaining the height. The valve directs the pressure to raise the rear when needed or directs it back to the reservoir when not needed. If the pump was needed to maintain height then the rear would always sag when the car was turned off.

The SLS is a slow acting system. it takes several seconds for a low rear to raise up. I'd argue that a bump will not cause a major change in fluid flow. There isn't enough time for anything to happen when you hit a bump.

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  #17  
Old 08-24-2011, 04:54 PM
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Quote:
Originally Posted by vstech View Post
death rattle, may not have damaged the head. best to pull it and take it to a machine shop and have it tested.
don't junk that block with the TD head on it!
.
Lordy, you guys are gonna make me pull this head before I send it to the crusher..
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  #18  
Old 08-24-2011, 04:57 PM
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Originally Posted by ashedd View Post
Lordy, you guys are gonna make me pull this head before I send it to the crusher..
Come on everyones doin' it!

Peer pressure's a ***** eh!
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  #19  
Old 08-24-2011, 05:46 PM
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Quote:
Originally Posted by neumann View Post
anyone tried the kit at slsconversion.com? it deletes the sls but I have more options for engine replacements

with this kit I can run the 100K engine I have
There are threads on that whole issue both here and on BW. There is also a guy who claims that w116 shocks will work, and someone who sourced a replacement non SLS shock in Europe.

It doesn't sound like a cut and dried works or doesn't issue for any of these fixes. Put it this way... when I got my wagon people started the "oooh SLS badbadjuju" stuff on me so I researched the thing.

I decided to start accumulating (no pun intended) used SLS replacement parts. I just don't see ringing endorsements from anyone except the guys who are promoting the fixes....
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2002 e320 4matic estate│1985 300d│1980 300td
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  #20  
Old 08-24-2011, 06:35 PM
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Quote:
Originally Posted by Biodiesel300TD View Post
The way I understand the system is that the pump is always pumping fluid to the valve in the rear, when the car is running. But when the rear is in a steady state, the fluid being pumped from the pump to the valve is just diverted back to the reservoir. All the pump does is supply pressure to raise the rear. It's not maintaining the height. The valve directs the pressure to raise the rear when needed or directs it back to the reservoir when not needed. If the pump was needed to maintain height then the rear would always sag when the car was turned off.

The SLS is a slow acting system. it takes several seconds for a low rear to raise up. I'd argue that a bump will not cause a major change in fluid flow. There isn't enough time for anything to happen when you hit a bump.
x2
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
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  #21  
Old 08-24-2011, 06:58 PM
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Spend the money to do a proper valve job, surface head, etc . . . . your head is fine I am sure with 260 on it, but foolish to not do valve job, new stems seals and timing chain with head off -good for another 300,000 miles!
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  #22  
Old 08-24-2011, 09:13 PM
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Quote:
Originally Posted by kerry View Post
I had driven about 75 miles with that busted hose before I stopped and the system held its pressure perfectly well with six people and a 1500'lb trailer hooked to the back bumper.
Your level valve had failed. There is NO hysteresis in the level system operation.
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  #23  
Old 08-24-2011, 09:21 PM
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Quote:
Originally Posted by ForcedInduction View Post
Your level valve had failed. There is NO hysteresis in the level system operation.
No indication that was the case. Car adjusted level just fine both before and since.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
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1993 GMC Sierra 6.5 TD 4x4
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  #24  
Old 08-24-2011, 09:21 PM
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Quote:
Originally Posted by neumann View Post
anyone tried the kit at slsconversion.com?
Garbage. Shocks and springs can't handle the load changes of both the 1000lb capacity cargo area and a 21 gallon fuel tank behind the axle.

Quote:
Originally Posted by Biodiesel300TD View Post
If the pump was needed to maintain height then the rear would always sag when the car was turned off.
The car isn't moving when its turned off.
Bounce it several times and watch the level go down and it become bouncy.
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  #25  
Old 08-25-2011, 03:12 PM
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Gotta admit, I was skeptical about the SLS system but I really do like it. I didn't realize what a good idea it was until was moving to a new apartment. I packed the back end full of stuff and the car rode exactly the same -- it didn't wallow or bottom out.

Watching the back end jump up and then slowly settle down to level every time I unloaded a heavy box of books was amusing.
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  #26  
Old 08-25-2011, 04:31 PM
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Quote:
Originally Posted by ForcedInduction View Post
The car isn't moving when its turned off.
Bounce it several times and watch the level go down and it become bouncy.
When you push the rear down with the car off you are moving the valve from the neutral (returning flow back to the res) to a fill position. Since the pump is off fluid can flow out of the rear back up to the front. Causing sagging. It has nothing to do with the pump.
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  #27  
Old 08-25-2011, 05:16 PM
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Anyone have a w124 ps/sls pump they want to sell? I want to see how it bolts up and what is involved for brackets and such...

With the overall ratio of of available engines heavily in favor of non wagon engines I see a need for an sls work around. I know you can swap heads and all that but the ease of pulling an engine and swapping in another without engine disassembly is very appealing.
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  #28  
Old 08-25-2011, 05:55 PM
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Quote:
Originally Posted by neumann View Post
Anyone have a w124 ps/sls pump they want to sell? I want to see how it bolts up and what is involved for brackets and such...

With the overall ratio of of available engines heavily in favor of non wagon engines I see a need for an sls work around. I know you can swap heads and all that but the ease of pulling an engine and swapping in another without engine disassembly is very appealing.
A good DIY on making this change is sorely needed on this forum. Go for it man.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #29  
Old 08-25-2011, 08:33 PM
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Quote:
Originally Posted by neumann View Post
I looked at an 80 wagon that needs an engine. What are my options for installing a non wagon engine so that I can keep the sls? I have access to another 80 non wagon engine and possible access to a turbo engine.
Hey, low mileage wagon motor on SF craig's list!
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  #30  
Old 08-25-2011, 09:40 PM
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Quote:
Originally Posted by Zacharias View Post
There are threads on that whole issue both here and on BW. There is also a guy who claims that w116 shocks will work, and someone who sourced a replacement non SLS shock in Europe.

It doesn't sound like a cut and dried works or doesn't issue for any of these fixes. Put it this way... when I got my wagon people started the "oooh SLS badbadjuju" stuff on me so I researched the thing.

I decided to start accumulating (no pun intended) used SLS replacement parts. I just don't see ringing endorsements from anyone except the guys who are promoting the fixes....
Really?
I find it amazing you are not getting ringing endorsements from everybody that has a working SLS... it's simply the most amazing feature in ANY car or truck I've ever driven, and that's saying something...
I've put over 1500lbs in my 79 wagon, and the vehicle rode perfectly level, and without sway. I was worried about my tires with that much load, but it handled it perfectly.
every wagon I have the SLS is the first thing I tackle to make sure it's working. and it's usually very simple to repair.

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