GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

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Old Sep 8, 2016 | 04:43 PM
  #26  
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a2j,
If you dont mind sharing, where did you order the compressor from? I checked with www.oediscountparts.com and they told me they would ship out a reman and requires the core back. Thanks
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Old Sep 8, 2016 | 10:32 PM
  #27  
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eBay. There are sellers direct from Germany last time I checked a few months ago.
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Old Sep 30, 2016 | 03:30 PM
  #28  
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GL 450, 993TT, Cayenne Diesel, 964C4
Originally Posted by a2j
Ordered a new AMK pump, for little over $300. Not from Arnott. Took the old one out, it wasn't difficult. Pump is located right under left headlight. Have to remove front part of the wheel well liner. 10mm nuts accessible from the bottom. Disconnect 2 air hoses and 2 electrical connection, remove those 3 nuts and drop it down.
There was something inside of the pump when I shook it so I decided to open it up. Some bearings fell out of there and piston had a play of about 1 mm.
It would be nice to know if we can get parts to rebuild these.
Can you clarify "left headlight?" I hear the pump on the front passenger side.
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Old Sep 30, 2016 | 03:56 PM
  #29  
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Pump is front pass side behind the wheel liner at 3 o'clock as you are facing the wheel
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Old Sep 30, 2016 | 05:01 PM
  #30  
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Thank you Alex
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Old Oct 5, 2016 | 11:45 AM
  #31  
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2008 GL320CDI (310k), 2017 GLS450 (170k), 2024 Sprinter 2500 (40k)
Originally Posted by nsx78
a2j,
If you dont mind sharing, where did you order the compressor from? I checked with www.oediscountparts.com and they told me they would ship out a reman and requires the core back. Thanks
Originally Posted by alx
eBay. There are sellers direct from Germany last time I checked a few months ago.
Yep. I got mine on ebay. I don't think it has to be from Germany (mine was), as long as it's AMK (oem).

Originally Posted by chsu74
Can you clarify "left headlight?" I hear the pump on the front passenger side.
Originally Posted by alx
Pump is front pass side behind the wheel liner at 3 o'clock as you are facing the wheel
Sorry, alx is right. I should have said passenger side.
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Old Oct 5, 2016 | 02:00 PM
  #32  
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GL 450, 993TT, Cayenne Diesel, 964C4
Originally Posted by a2j
Yep. I got mine on ebay. I don't think it has to be from Germany (mine was), as long as it's AMK (oem).Sorry, alx is right. I should have said passenger side.
Thanks!

I ordered from Arnott and paid extra for fast and reliable service. Appears to have plenty of options on eBay new and rebuilt. eBay also offers new Arnott at $100+ cheaper than price on Arnott's website. This is all found after I ordered from Arnott.

I have a leak in the reservoir on the pump and discovered the leak early. Wonder if I can find the housing to rebuild it myself to keep as a backup. The eBay rebuild kits for sale seems to be parts for the piston and not the plastic air reservoir housing.
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Old Oct 5, 2016 | 02:20 PM
  #33  
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2008 GL320CDI (310k), 2017 GLS450 (170k), 2024 Sprinter 2500 (40k)
Originally Posted by chsu74
Wonder if I can find the housing to rebuild it myself to keep as a backup. The eBay rebuild kits for sale seems to be parts for the piston and not the plastic air reservoir housing.
I wanted to do the same, but I can't find any rebuild kits for the AMK compressor.
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Old Oct 5, 2016 | 06:48 PM
  #34  
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Originally Posted by chsu74
Thanks!

I ordered from Arnott and paid extra for fast and reliable service. Appears to have plenty of options on eBay new and rebuilt. eBay also offers new Arnott at $100+ cheaper than price on Arnott's website. This is all found after I ordered from Arnott.

I have a leak in the reservoir on the pump and discovered the leak early. Wonder if I can find the housing to rebuild it myself to keep as a backup. The eBay rebuild kits for sale seems to be parts for the piston and not the plastic air reservoir housing.
the crack in the reservoir is common. I have tried (out of curiosity) to epoxy a couple and they all leaked shortly after. the plastic is just one of those that does not like epoxy, but i am no chemical engineer so ymmv.
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Old Oct 5, 2016 | 08:32 PM
  #35  
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GL 450, 993TT, Cayenne Diesel, 964C4
Originally Posted by alx
the crack in the reservoir is common. I have tried (out of curiosity) to epoxy a couple and they all leaked shortly after. the plastic is just one of those that does not like epoxy, but i am no chemical engineer so ymmv.
Plastic and rubber molecular compounds breaks down and crack due to age and fatigue from pressure exerted. I have not taken apart the plastic air compressor reservoir yet but I predict that it is probably too thin...
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Old Oct 7, 2016 | 07:10 PM
  #36  
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GL 450, 993TT, Cayenne Diesel, 964C4
I spent about 1.5 hours installing a new air compressor today. Few tips learned when installing that wasted about 45 minutes. The one bolt closest to the radiator is a pain and I ended up bolting it by feel sitting instead of on a creeper.

Get the two bolts closest to the wheel bolted up first without the spring and washer and align the one bolt closest to the radiator done first. After the hardest one is done, then the other two is easy..
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