My SLS

[TJ 450]

Hey Oscar,

If you can find the cause of the high back end, I would love to know. I've tried a second valve on my 450, and it never wants to come down.

Tim

[oscar]

I actually thought it might have been you that said there was a rebuild kit for an sls valve? But that might be just a gasket kit.  Ages ago I posted about the problem and after bleeding and adjusting the rod it just kept pumping up.  The red 280's valve OTOH has a missing linkage and I reckon it's been missing for a while.  The difference in the movement of the 350's valve arm and the 280's is that in one direction the 350's feels like it's grinding whereas the 280s feels smooth in both directions, so I'm hoping a swap will cure it though I'll be pulling apart the old one to see if there's anything obviously wrong.  It's a problem I've grown use to and wasn't as noticeable with the cheap 14" soft wall tyres that didn't make the rise as pronounced.  If the replacement valve doesn't work i'll be mildly upset and will open both and put a third one on as a stop gap.  Will let you know how I go.  Saturday is spanner day.

[Big_Richard]

Hey Oscar,

If you can find the cause of the high back end, I would love to know. I've tried a second valve on my 450, and it never wants to come down.

Tim

I hypothesize that you have non SLS springs in the rear, I suggest this because your car is fitted with a towbar. I also witnessed complete depressurisation of your SLS system and the car remained high at the rear - doesn't matter what you do to the SLS system if the springs are holding the car higher than where it should be

[TJ 450]

Sounds reasonable, but the SLS was sagging when I got the car. It's a bit odd.

Tim

[Big_Richard]

Sounds reasonable, but the SLS was sagging when I got the car. It's a bit odd.

Tim

maybe you need to drive around with more than 3 ounces of fuel in the tank for a change, and give that reserve light a rest

[TJ 450]

I doubt that has anything to do with it.

Perhaps I just need to replace the spheres.

Anyway, that's another topic for another time.

Tim

[Big_Richard]

I doubt that has anything to do with it.

Perhaps I just need to replace the spheres.

Anyway, that's another topic for another time.

Tim

Remember the valve was totally removed on my front lawn, the car didn't miraculously sink, the springs still held it up as high as it was before

[TJ 450]

I do remember that, but the first time I bled the SLS on that car, it came right down. I simply don't get it.

Tim

[koan]

There used to be a rebuild kit for SLS valves years ago, it might be NLA now.

I was hoping the valve was the same as 6.9 valve but soon found out they are completely different.

Here's a link to SLS valve rebuilding on peachparts that you have probably seen already.

koan

[oscar]

That's the first time I've seen inside a levelling valve, thanks koan.  I haven't had a chance to take mine apart because the car's being used all the time atm but the way my actuating lever grinds I'm guessing the cam and the back of the main piston are rooted.  By that post though I'm still not 100% sure how the valve and cam works.

[koan]

That's the first time I've seen inside a levelling valve

I can't see any pictures

koan

[oscar]

Just checking again and they come up on my computer. 

Not to worry, it's these three.  I'm going to have to sit down and re read his thread again tomorrow.  It looks simple enough but I've a habit of breaking open things and watching springs fly out only to read warnings afterwards.

[npk]

No sure if problem is solved...but I experience this MANY years ago on W124 TE...the mechanic fitted the lines wrongly at the leveling valve...worth checking if the lines are connected to the right ports at the valve

[TJ 450]

The problem's not solved on my car, but I suspect it is because the spheres are flat. I'm confident that the valve works on my car.

BTW MT, remember when my 450 was on the ramps depressurised, the rear suspension dropped to the normal level (no negative camber).

My 450 had a bouncy and sagging rear end when I got it, and I think the spheres were on the way out.  Now the rear suspension is rock hard with negative camber.

Tim