D4 MY11 Air Compressor Failed

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Originally Posted by ~Rich~

The air intake for the compressor is actually from within the cabin space of the vehicle.

I wonder if those who use climate control and of course A/C rather than driving around with the windows down actually get better life of their desiccant / dryer because the A/C removes the moisture from the air in humid / damp temperatures?

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Got me to thinking... has anyone added a "pre-dryer" to the head of the air intake in the cabin? (maybe it has one already?) It would make sense to have a cannister of desiccant to absorb moisture before air enters the air intake tube leaving the inbuilt dryer to take care of any small amounts of remaining moisture.

Something like this:
[ame="http://www.amazon.com/Disposable-Mini-Line-Desiccant-Dryer/dp/B002DLYOGU"]Disposable Mini In Line Desiccant Dryer [Made In USA] : Amazon.com : Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/315RPwsHdBL.@@AMEPARAM@@315RPwsHdBL[/ame]


It would also make for simple maintenance as it would be easily accessed and the change in desiccant colour is easily visible through the sides so you would know when to put a new one on.

GOE Air Compressor Protection Plate fits. The Newer compressor fits in the original space and within the original plastic covers

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Originally Posted by AGRO

GOE Air Compressor Protection Plate fits. The Newer compressor fits in the original space and within the original plastic covers

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According to the pictures in the Disco3.co.uk thread, the new compressor comes as a kit with a reshaped cover but that's not to say the cover hangs significantly lower.

Wot Graeme said.

Looked luke that to me.

I finally got around to taking apart the compressor from my old D3 which failed a couple of years ago a while after a Simpson Desert trip. The dessicant in the dryer was not wet but had some of it had discoloured. Also some had broken down into a powder and I think had caked up on the 2 filters at either end of the dryer. Whether this was the cause of the failure I don't know.
Am tempted to buy the repair kit which am I right in thinking consists of a spring valve and the the stuff to go in the dryer. I suppose there is no way of testing the unit on the bench is there? Would do it on my D4 but a bit nervous of getting the pipes off as other people have had trouble. Or is there a knack to get them off?
Heres a few pics of the dryer and stuff.

The compressor is easily tested by supplying power and earth to the pins in the motor power connector, perhaps using jumper leads as I did. With the pump running there may or may not be any pressure at the outlet from the dryer that goes to the reservoir valve block. If there's no pressure with the dryer refitted empty then the compressor isn't pumping, in which case the valve for which there's a kit could be dismantled and inspected to see if its worthwhile getting the valve repair kit.

I had my EAS compressor replaced yesterday under warranty (MY11 HSE). I use my EAS daily (often multiple times) to enter my garage and had noted a gradual decline in compressor efficiency moving between the different heights. Last weekend l took the cover off and the compressor was red hot and running for too long before cut out.

Contacted the guys down at Hunter Land Rover and the compressor was indeed 'not to specification'. New AMK compressor fitted. It comes with new covers and sits at a similar height to the old compressor (l have photos to attach of 'old' and 'new' when l get home from work). Performance wise it seems similar to the Hitachi compressor when new and slightly louder. Perhaps Gordon can answer if the GOE compressor cover fits the new unit.

Regards Trif.

When I used to own an 08 D3, my service manager sheepishly said to me, "well' you've had the air compressor replaced and the EPB replaced, there's really only the front bushes and that's pretty much all that goes wrong with the discos".

Mind you, having forked out $1300 for the compressor and something ridiculous for the EPB ($2500 i think) all just outside the warranty period, on top of the constant brake pad changes, I wasn't going to wait for the next thing to happen so flogged it off (at quite a loss, obviously, being a LR).

I think it's a shame LR know about these faults and fail to do anything about them. I'm looking for another tow vehicle to tow our boat and did entertain the thought of a D4, but it seems the reliability issues have not been ironed out...

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Originally Posted by discojools

I finally got around to taking apart the compressor from my old D3 which failed a couple of years ago...

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You should be aware that once an AMK compressor is fitted, the 3 hoses that connect to the compressor are re-worked, hence Hitachi compressors cannot simply be refitted.

Photos comparing position of the compressor.