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EAS issues - parking on blocks

3606 Views 22 Replies 7 Participants Last post by  RogerB.
Happy new year all

Not entirely sure if I'm being a bit dim here, but here goes....

I have a EAS leak in the front drivers side – the collet won't seal properly. I've re-piped the bag to the valve block to no avail. The leak is intermittent, sometimes its fine for ages, then troublesome.

So, as she's wearing oversize tyres, I park her on full height, and put blocks under the bump stops, leaving a small gap. As she senses the drivers front air bag going down, she settles the other 3 to rest on the blocks, lowering about an inch or so.

My theory is the pump is only then having to inflate the bags a small amount instead of empty to full (as she would lower to bump stops trying to level against the leaking bag), and the oversize tyres don't end up sitting on the body (no extended bumps yet)

When parked, I leave the switch in extended height, and there's a trickle charger keeping the battery nicely topped up. Quite often when I come back to her after a week or so, I will have one completely deflated bag, and 3 nice firm bags

Now I reckon that is not doing the EAS any harm being parked like this, but she won't come up at all unless I remove the blocks and lower the car on the jack – this seems to trigger a reaction, and low and behold, up she comes – I noticed this a while ago and was pointed to the fuse box, but is it too consistent for a fuse box fault? Am I actually hurting the EAS leaving her on blocks? When parked, is she trying to level up and getting confused? - there's no saying my blocks correspond to the calibrated heights, so she might never think she's actually level.

The cars a 4.6 HSE Gems, on Arnott Gen 3 bags – the pump is new, the valve block and sensors seem ok (like I say, once woken up, the EAS works fine) – she does have sparodic door/alarm issues at the moment, so often isn't going to sleep properly.

Also, any tricks to sealing an airbag collet before my new pump gets worn out trying to keep up?

Appreciate any assistance,

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I have got Arnott Gen III's on mine. Collets are the same as Dunlop/OEM collets. Cheap to buy and always good to have a few as spares.
Remember there are two o-rings in the air bag same as the valve block has. Also if the nylon tube is worn, shorten it back an inch or so and put a chamfer on it with a pencil sharpener. Put a bit of dish washing liquid on it to help push it fully home.
Arnotts leak, usually around the top clamp ring. Mine did.
I found the leak by taking it off, then blowing it up with compressed air with a valve in the air line and then dunking it in a tank of water.
Arnotts don't have a lifetime guarantee in the UK. They only give 2 years.

edit: RRTH slipped in before me with pencil sharpener tip
The rear height sensors need to be modified to get the extra height that Gen III air bags give. The front sensors are OK as they are. The rear need extending about 1" longer and the arms also need to be bent to bring them back into range. From memory I think the max is 160 front and 150 rear (I might have got it the wrong way round). More than this it goes out of range.
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