Air leak

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Saint.V8 said:
Regardless of everything else mentioned....25mm is quite a lot with regards to CoG stability, hence why LR installed the Motorway height reduction!

Whilst I am a decent Design Engineer and have worked on a few complex design jobs, I still wouldn't question LR on their decision to install a 25mm drop at motorways speeds, they know the design parameters and the vehicle handling behaviour far better than most of us would!

As a Design Engineer, your role is to see what can be left out as well as what can be left in....why over complicate the design for the sake of it, why go to the additional cost of deveolping and testing a motorway mode if it wasn't necessary....the P38 was designed that way, IMO let the system decide for itself its best operating parameters....and as for the compressor not having to work as hard, how many times do you go above 52mph and then drop below 30mph then back up to 52mph again??
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so all these defenders and disco with high lift up 4 inches must be accident prone .
Where I live there are a lot if short carriageways with endless roundabouts 40 restrictions ect therefore it much more use than nessary especially as I use the route to and from work daily . If I were to go on a long motorway trip then that would be a different matter.
I understand that the system has its used but then again you can also take advantage of it as well.
 
defender300td1 said:
so all these defenders and disco with high lift up 4 inches must be accident prone .
Where I live there are a lot if short carriageways with endless roundabouts 40 restrictions ect therefore it much more use than nessary especially as I use the route to and from work daily . If I were to go on a long motorway trip then that would be a different matter.
I understand that the system has its used but then again you can also take advantage of it as well.
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Yes high lifted Models are more prone to getting high centred....you have to drive those accordingly, and most often high lift models are off road trialers in anycase....

You choose how to run the EAS how you see fit, that is your choice, I am just saying the system was designed to and for a purpose!
 
defender300td1 said:
so all these defenders and disco with high lift up 4 inches must be accident prone .
Where I live there are a lot if short carriageways with endless roundabouts 40 restrictions ect therefore it much more use than nessary especially as I use the route to and from work daily . If I were to go on a long motorway trip then that would be a different matter.
I understand that the system has its used but then again you can also take advantage of it as well.
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The car should not drop that much overnight, that is doing more harm to your compressor that the drop to motorway height. since I overhauled the EAS mine drops about 5 mm a week and not noticably over night.
Sounds like you have leaking airsprings.
 
Datatek said:
The car should not drop that much overnight, that is doing more harm to your compressor that the drop to motorway height. since I overhauled the EAS mine drops about 5 mm a week and not noticably over night.
Sounds like you have leaking airsprings.
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You probably park on a road I park in my garden with big pot holes so it has to lower if I had a leak it would be on the bump stops .
 
Datatek said:
Look at the height sensor actual readings. Otherwise I have to think there is a leak under certain conditions such as when there is a lot of suspension movement. Might be worth checking the compressor temperature when you get to the horses, I suspect it's over working and cutting out on temperature.
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Hey, you're good :)

Just used the car for the first time in a week. Arrived at work. Stopped the car and checked. Not only was the suspension down a bit but the compressor was red hot. In fact too hot to touch. As soon as I started the car it jumped back up to normal height and will sit there fine now.

So what do you think. I know you said a leak under certain conditions, but where from? The bags? When you say check the height sensor readings: what am I checking?

tnx

Nik
 
NikTheGeek said:
Hey, you're good :)

Just used the car for the first time in a week. Arrived at work. Stopped the car and checked. Not only was the suspension down a bit but the compressor was red hot. In fact too hot to touch. As soon as I started the car it jumped back up to normal height and will sit there fine now.

So what do you think. I know you said a leak under certain conditions, but where from? The bags? When you say check the height sensor readings: what am I checking?

tnx

Nik
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mine gets hot bloody hot too and I have no leaks :)
It been like it for two years now so I assume its normal to get hot , bit like a fridge compressor .
 
NikTheGeek said:
Hey, you're good :)

Just used the car for the first time in a week. Arrived at work. Stopped the car and checked. Not only was the suspension down a bit but the compressor was red hot. In fact too hot to touch. As soon as I started the car it jumped back up to normal height and will sit there fine now.

So what do you think. I know you said a leak under certain conditions, but where from? The bags? When you say check the height sensor readings: what am I checking?

tnx

Nik
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Airbags are the first suspect even if they are new they have been known to leak, I had a duff one. Then the airline connections at the bags and valve block dryer etc. After that it's tank line or valve block or just possibly the reed valves in the compressor. Wammers knows more about the mechanics of it than I do.
The compressor will not run often enough to be seriously hot once it's up to height but it has a max running temperature of 120C.
 
Nic put in in full hieght with engine running , get out push tailgate button so its ajar close and lock car with it ajar if it drops you got a leak if it doesn't its a dodgy sensor ,

I haven't a leak as when I do above it don't move when I lock car in my very uneven garden with all doors locked including tail gate it drops a bit overnight to level . So open tailgate ajar and see!
 
defender300td1 said:
Nic put in in full hieght with engine running , get out push tailgate button so its ajar close and lock car with it ajar if it drops you got a leak if it doesn't its a dodgy sensor ,

I haven't a leak as when I do above it don't move when I lock car in my very uneven garden with all doors locked including tail gate it drops a bit overnight to level . So open tailgate ajar and see!
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Removing the relay does the same thing and that has been tried. Airbag leaks open and close with movement.
 
Datatek said:
Removing the relay does the same thing and that has been tried. Airbag leaks open and close with movement.
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When he took the relay out he said it didn't drop hope he did it a full hieght with no folds in bag ect . So that points to a irregular sensor to me . If it don't leak in full hieght it won't leak at all IMO movement or not
 
NikTheGeek said:
Thanks both. I'd heard the timer was supposed to activate every 6 hours but this can be after 10 mins. Also, I've noticed that when I come to a stop (engine still on tickover) the car is self-leveling then too). I turn it off, go away for 10 mins+ come back and start it and it raises and self-levels.

I've took it out so I'll see in the morning if it is a bag. If its a sensor playing up, I assume I can clean them with switch cleaner?

Nik
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If you go and park your car somewhere uneven turn it off and lock it if you listen its starts to self-level Immediately and every 6 hours there after that's why after ten minutes its dropped.
 
defender300td1 said:
When he took the relay out he said it didn't drop hope he did it a full hieght with no folds in bag ect . So that points to a irregular sensor to me . If it don't leak in full hieght it won't leak at all IMO movement or not
Click to expand...

There is always a fold in the bags. Even at extra extended position.
 
Sat the car on the drive on idle and the compressor is on-off-on-off all the time. In a 1 min video (that I'll post) it was on more than it was off and running hot. But the bags hold and it'll sit there holding that height all weekend.

So I guess, if I have a leak, it's internal to the compressor or somewhere between the compressor and storage reservoir? I've got Wammer's How To and assume it's best to go through it in order. But if you were a betting man, what would you guess? :)

Range Rover P38 EAS compressor - YouTube

tnx

Nik
 
NikTheGeek said:
Sat the car on the drive on idle and the compressor is on-off-on-off all the time. In a 1 min video (that I'll post) it was on more than it was off and running hot. But the bags hold and it'll sit there holding that height all weekend.

So I guess, if I have a leak, it's internal to the compressor or somewhere between the compressor and storage reservoir? I've got Wammer's How To and assume it's best to go through it in order. But if you were a betting man, what would you guess? :)

Range Rover P38 EAS compressor - YouTube

tnx

Nik
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Remember if the air tank is leaking or low it can take 5 mins to fill with a door open.
So if after 5 mins it don't stop with door open should be sooner if you haven't just raised the car .
Then you would say its your air tank feed as that's what's supposed to fill up and stop with no adjusting of the hieghts . Or your valve block diagpham pressure switch or a moosive leak.
 
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defender300td1 said:
If you go and park your car somewhere uneven turn it off and lock it if you listen its starts to self-level Immediately and every 6 hours there after that's why after ten minutes its dropped.
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If you stop and let it level, it moves very little after you turn it off. After that, the 6 hour self level will only adjust if the sensors show that it has dropped, if the sensor readings are constant it will not drop.
 
defender300td1 said:
When he took the relay out he said it didn't drop hope he did it a full hieght with no folds in bag ect . So that points to a irregular sensor to me . If it don't leak in full hieght it won't leak at all IMO movement or not
Click to expand...
There is always a fold and at full height they are less likely to drop as the leaks open and close as the folded section moves. They are most likely to leak at normal height.
 
Taken off the blue outlet pipe from the compressor. I can put my finger over the hole very easily. Its no stronger than if I blew threw a drinking straw. So I guess the compressor needs an overhaul. But would its weak output cause constant running?

Nik
 
NikTheGeek said:
Taken off the blue outlet pipe from the compressor. I can put my finger over the hole very easily. Its no stronger than if I blew threw a drinking straw. So I guess the compressor needs an overhaul. But would its weak output cause constant running?

Nik
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Yes as it would need to run longer to replace the pressure lost due to leveling.
 
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