Member Since: 15 Jan 2014
Location: The Cotswolds
Posts: 1372
What happened to the one you fitted w/c 2nd November?
Personally I wouldn't do anything else. The valve block should be easy to change if / when the time comes and I don't think having the compressor off improves access much (from memory). I'd fit the tank as is - the current one's lasted almost 10 years. Or maybe just do the ends as that seems to be where they go?
Make sure to have new captive nuts (don't drop them when fitting - easily done) and new relay. The only thing that didn't come with my new compressor was the nuts but I don't know that all are supplied with the relay.2016 Skoda Octavia VRS Estate
<gone>2009 FF Vogue TDV8 Buckingham Blue</gone>
<gone>2015 BMW 520D SE (not my favourite car)</gone>
<gone>2009 D3 HSE Galway Green</gone
7th Jan 2015 9:39 am
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3457
MikeO wrote:
What happened to the one you fitted w/c 2nd November?
I didn't fit it. I've been toying with the idea of chopping the D3 in for something newer/cheaper but decided keeping the D3 for a bit longer is ultimately cheaper than taking out another lease on something I don't want to drive.
Only reason I asked about fitting other parts (especially the reservoir valve block) was because my Gallery Pressure seems to be constantly sitting at 96 kPa. This seems far too low to me. Sporadically, it will increase to ~900 kPa and then rapidly drop back down to 96 kPa. This is when cruising along the motorway at 70 mph.
The ride is horrendously crashy at the moment but have no fault codes logged for reservoir valve block or anything else. I'm hoping a new compressor, air tank, and AMK flash of the RHM will sort it out. Otherwise, I'm looking at a new reservoir valve block and - potentially - air springs.
I know the gallery pressure sensor is available as a separate part but I imagine it's probably not worth replacing that in isolation on a 8 year old valve block that's probably contaminated with silica dust.
Are the gallery pressure I'm seeing (~96 kPa) considered normal? Like I say, the compressor cuts in and out but the pressure seems to drop rapidly at random times. I'm guessing the fault lies with the exhaust valve on the old Hitachi compressor.
Anyway, the new parts go on at the weekend and we'll see how things are after that.
Steve2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
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2007 Discovery 3 TDV6 S Manual in Zermatt Silver with Ebony Cloth (143k) Gone, but now patrolling the Asia section of the West Midlands Safari Park!
7th Jan 2015 8:36 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
Once the system has built up to 1800kpa, the reservoir valve closes and the system dumps itself of air...My D3 Build Thread
Member Since: 15 Jan 2014
Location: The Cotswolds
Posts: 1372
I see about 150-170kPa normally since my suspension issue went away. Prior to that it was 250-350kPa and when it sits at the top end of that, it throws the "gallery pressure not decreasing" fault. See the end of this thread: http://disco3.co.uk/forum/topic121291.html where typical gallery pressures are discussed.
96kPa is atmospheric pressure though so it sounds like you're exhausting every last drop. My gallery pressure will rise to 1780kPa if I raise the car and then as soon as it hits it, drop back to 150-170kPa.
If I were you I'd fit the new compressor and see what the gallery pressures look like after that. As you're pretty certain the compressor is borked and it could be causing a number of different issues.
Mike2016 Skoda Octavia VRS Estate
<gone>2009 FF Vogue TDV8 Buckingham Blue</gone>
<gone>2015 BMW 520D SE (not my favourite car)</gone>
<gone>2009 D3 HSE Galway Green</gone
7th Jan 2015 8:53 pm
Woolmeister
Member Since: 26 Mar 2007
Location: Chandler's Ford
Posts: 3457
Atmospheric pressure should be approximately 1021 hPa this evening yet my IIDTool is still displaying 96 kPa (960 hPa) Gallery Pressure.
This suggests my suspension compressor is actually creating a small vacuum in the air tank (if it's less than atmospheric pressure, right?).
1 kPa = 10 hPa therefore atmospheric pressure should be registering as 102.1 kPa.
I have no idea where it is getting 96 kPa from. This is what makes me believe the pressure sensor is .
I shall fit the new compressor and air tank and see what's going on after that.
Steve2021 BMW iX3 Premier Edition in Carbon Black ⚡️🔌
2019 Škoda Kodiaq 2.0 Tdi 190 DSG Sportline in Quartz Grey. Excellent vehicle. Gone.
2017 Discovery Sport HSE Auto in Carpathian Grey and Ebony Leather. Modern JLR Junk. Gone.
2007 Discovery 3 TDV6 S Manual in Zermatt Silver with Ebony Cloth (143k) Gone, but now patrolling the Asia section of the West Midlands Safari Park!
All done thanks very much Pot Noodle Challenge Winner 2011
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15th Jan 2015 4:44 pm
LX0850
Member Since: 28 Apr 2010
Location: Luxembourg
Posts: 62
Hello Everybody,
I've just had the compressor replaced on our MY05 D3 and asked the garage to give me the old one.
The garage said the D3 was blowing a fuse and producing all the normal errors because it couldn't build enough pressure. It is a company car so we fitted a new compressor.
How do I test the old compressor to see if it works at all?
I could put power to the red/black power socket but the other socket has a lot of connectors and I suppose they do something......
Thanks!
-Graham-
PS: If anyone sees this twice - sorry I'm cross-posting.
(Didn't know which thread was better)
25th Jan 2015 12:44 pm
crwoody
Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109
12 volt power to the thick red/black wires will tell you if the motor is working, the other smaller wires are for the temperature sensors and exhaust valve solenoid, they can be ignored for a bench test such as this.
The compressor motor running does not tell the full story though, it's quite possible the drier is blocked or the end cap is cracked, or even the reservoir tank on the car could be porous, any of which could prevent the system reaching full pressure.Clive
25th Jan 2015 1:14 pm
LX0850
Member Since: 28 Apr 2010
Location: Luxembourg
Posts: 62
Thanks Clive,
I didn't think it was going to be rocket science - I just wanted to be sure because I wanted to offer the used unit for sale on the forum.
The motor turns when I connect it to a battery and sounds like a lab. vacuum pump so that's good.
Anyway here's what I want to do:
I'll take a few photo's and put it up for sale (by auction) in the For Sale & Wanted section.
All proceeds go to the forum.
- Whoever "wins" the auction donates the money to disco3.co.uk and when Martin mails me to say the money has arrived I send the compressor off by UPS, at my cost (sorry - Europe Only).
A strange idea but the forum gets a donation and someone gets a compressor to "play" with....
Watch that space !
-Graham-
PS: The UK was in Europe the last time I looked
25th Jan 2015 10:13 pm
Black_64
Member Since: 21 Feb 2012
Location: Limburg
Posts: 47
Thanks to this excellent write up, it was easy to replace the Hitachi compressor with the new AMK !!
I used heating gun for heating the airline a bit (because it's still cold in the morning here) so i could put the bras insert in the airline. This went smooth.
It toked me about 1 hour. Then i replaced the relais and flashed the AMK firmware with the IID Tool.
No faults anymore and i hope they stay away.
Big thanks to Disco_Mikey!! 2006 Discovery 3 TDV6 Buckingham Blue -- IIDTool V3.0
8th Mar 2015 11:38 am
SimonH
Member Since: 29 Apr 2006
Location: North Yorkshire
Posts: 161
Update on my new AMK being noisy.
There is a self tap bolt that goes up thru the bottom plastic plastic housing into the one piece bracket.
I had done mine up too tight and it was pressing the plastic up hard against the compressor bracket and amplifying the sound very effectively.
A few turns out on the bolt so the there is a little space between the housing and the compressor assembly and all is near silent humming.
Sorted. Though why I didn't try this earlier, I don't know NOW SOLD: 2006 TDV6 SE Auto Zermatt silver with Alpaca Leather
Tow Pack, PTI, Full Size Spare
21st Apr 2015 7:50 pm
rovervirus
Member Since: 31 Oct 2012
Location: behind the sun
Posts: 92
today my compressor did die in the morning.
question: does the compressor from the ffrr fit?
I mean this one:
I could get a nearly new one for low budget and I am wondering if it wold fit.
the compressor itself looks very simiar to the D3 one (ignore the black tubes beside the
compressor, they are filters).
would be wonderful, if anyone has made some experiences with this option. tanks a lot.Engineering is the perfect partnership between physics and design
8th May 2015 8:58 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
FFRR is different, and I don't.think it is compatible with D3/D4...My D3 Build Thread
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This seems far too low to me. Sporadically, it will increase to ~900 kPa and then rapidly drop back down to 96 kPa. This is when cruising along the motorway at 70 mph.
.
