Front EAS leak -

Howski

Well-known member
Oct 19, 2009
1,067
46
Greenville, S.C.
I have a small (1/2” per day) leak coming from the front suspension. With EAS fuses pulled it drops evenly across the front end, the rear doesn’t drop at all. Rebuilt valve block, same result. Had read several places valve blocks can leak back into the system so I put in a new block. Again, still the same small drop. Eliminating the valve block as the problem I’m assuming this is downstream of them in the system. Have sprayed down air bags, top and bottom, and have not found any leaks. Anything else I need to look at? These are original bags so wondering if I just have pinhole leaks in them
 

discostew

Well-known member
Sep 14, 2010
5,360
203
Northern Illinois
Well you more than likely have a corner valve leaking air back to the reservoir. Not sure what you mean when you say rebuilt valve block.
The correct way to start diagnosing it would be to either disconnect the battery or leave a door open overnight to narrow down if it's right or left side. The car will wake up and level the truck out, so you want to disable that.
 

jymmiejamz

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Dec 5, 2004
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Los Angeles, Ca
It doesn't really make sense that both front springs are leaking down evenly. There is an air line to each air spring that connects to the valve block and an air line that goes to the reservoir valve. The front valve block isolates the front springs and lines from the rest of the system when functioning normally. For both springs to leak down you would have to have a bad valve block or multiple leaks in the front springs/lines.
 
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Howski

Well-known member
Oct 19, 2009
1,067
46
Greenville, S.C.
Stew, the method I mentioned in removing the fuses for the EAS accomplished this in isolating the front portion of the system and disable the ‘auto-leveling’. My initial thought was the front block was leaking back into the reservoir. The rebuild involves replacing all the O-rings inside the block itself.

jimmy, that’s unfortunately what I was thinking as well. I believe these are the original air springs so wouldn’t be surprised if it’s one of those, though there are no obvious leaks. Where are some other common areas of leaks on the springs or lines? Have already looked at the ‘body’ of the spring and air fittings which I understand are the most common areas
 

discostew

Well-known member
Sep 14, 2010
5,360
203
Northern Illinois
The springs do leak sometimes. But not very common. I would replace that corner valve. The problem with them is they stick internally and cause air to leak back to your reservoir. Not externally thru the seals you replaced. I've had some, but not great, luck lubing them up internally.

I'm not sure what fuse your pulling, I would just leave the door hanging open, the truck won't make an adjustment if a door is open. If you park someplace thats not secure enough to do that then disconnect the battery. I think if you do that you will find that its only one corner. At that point I pinch off the air line coming out of that spring and retest it. If you do end up needing springs Atlantic British had some old part# original struts for really cheap. My friend is running them on a sport with no problems.
 

Howski

Well-known member
Oct 19, 2009
1,067
46
Greenville, S.C.
I think we’re referring to the same thing in the ‘corner valve’ and ‘valve block’ for the front which I rebuild then replaced with a brand new one and had the same result.

The fuses I am pulling are F35, F3e, F26e which control EAS and disable the ‘self leveling’ while sitting. It’s my understanding this cuts any power to the valve block too
 

jymmiejamz

Well-known member
Dec 5, 2004
5,655
132
32
Los Angeles, Ca
jimmy, that’s unfortunately what I was thinking as well. I believe these are the original air springs so wouldn’t be surprised if it’s one of those, though there are no obvious leaks. Where are some other common areas of leaks on the springs or lines? Have already looked at the ‘body’ of the spring and air fittings which I understand are the most common areas
I don't think I've ever seen a spring leak on an LR3. I've seen the line run through under the radiator, but that was a large and obvious leak. The spring rolls on itself inside of a metal sleeve, so I don't think you would visually see it leaking unless it was a pretty big leak.
 

discostew

Well-known member
Sep 14, 2010
5,360
203
Northern Illinois
I think we’re referring to the same thing in the ‘corner valve’ and ‘valve block’ for the front which I rebuild then replaced with a brand new one and had the same result.

The fuses I am pulling are F35, F3e, F26e which control EAS and disable the ‘self leveling’ while sitting. It’s my understanding this cuts any power to the valve block too
I bet it does. I just don't like pulling fuses to do this sort of thing because they don't always end up back in the correct slots. I have seen a few struts leak on these cars, but also see more lines leaking. I would take a pair of pliers designed to pinch off hoses and gain access to the air line coming out of the struts. Then pinch them off to see if you can stop the sinking.

So when you pull your fuses the whole car still sinks down, not just one corner?
 

Howski

Well-known member
Oct 19, 2009
1,067
46
Greenville, S.C.
Think I solved my problem due to my own stupidity. Went for a drive yesterday and got an EAS light, ‘Pressure increases when system inactive’. Did some digging and determined I installed the two lines wrong on the side of the block. Installed the lines correctly and didn’t drop a bit in 24 hours. Hopefully that’s the end of it and I’ll pay better attention next time