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Thread: replacement front diff breather Disco 3 and 4

  1. 11th December 2017, 12:42 PM #1
    Aussie Jeepster
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    replacement front diff breather Disco 3 and 4

    For those new to owning D3's and probably some D4's, did you know that Land Rover issued a bulletin about replacing the front diff breather????
    I found the thread on the weekend and have just ordered the new version from the local dealer in Adelaide for $73. I could probably get it cheaper on the net, but they have been good to me for other bits, so I'm supporting them
    Seems an easy 5 min job when the part arrives.
    Info here DISCO3.CO.UK - View topic - How to change front diff breather valve/filter/vent
    And this is the new replacement item.
    normal_Breather_Cap_Front_Differential_LR019450.JPG
    2012 L320 Range Rover Sport Fuji White
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  2. 12th December 2017, 07:29 PM #2
    Aussie Jeepster
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    Changed over my old breather tonite.
    Took 5 mins.
    When I checked the old breather, it was blocked solid with whatever crud the filter used to be made of!
    I would urge EVERYONE to check your breather and do this mod BEFORE oil starts to weep from your front diff.
    Alan
    2012 L320 Range Rover Sport Fuji White
    REMLR 012
    No 5 Trailer ARN 177-295
    2006 Disco 3, 4L V6 Petrol SE Deceased Feb 26 2023
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    SOLD RAAF 231194 Perentie 110 GS - SIR ANGUS
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  3. 12th December 2017, 07:41 PM #3
    DiscoJeffster
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    I just checked mine, disappointed to find the old one. $73 for that though. Brings a new name for the term stealer. Tempted to DIY a cheaper alternative.
    2010 TDV6 3.0L Discovery 4 HSE
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  4. 12th December 2017, 08:18 PM #4
    Aussie Jeepster
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    Anything will be better than a blocked breather - just cut the bloody thing off and stick a bit of sponge over it.
    If I'd known about this when I purchased mine, I'd have just cut it off until I got a replacement.
    And if your are unsure, cut it off and try breathing through it, or digging the white crap out of the inside of it.
    2012 L320 Range Rover Sport Fuji White
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    No 5 Trailer ARN 177-295
    2006 Disco 3, 4L V6 Petrol SE Deceased Feb 26 2023
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  5. 12th December 2017, 08:26 PM #5
    remoman
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    Just changed mine tonight. Easy job. Old one was completely blocked.
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  6. 12th December 2017, 09:48 PM #6
    specwarop
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    Why do you need the expensive replacement? Its just a one-way valve right, to prevent water ingress.
    But if you never submerge the breather, is there an issue?
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  7. 12th December 2017, 10:11 PM #7
    DiscoJeffster
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    Quote Originally Posted by specwarop View Post
    Why do you need the expensive replacement? Its just a one-way valve right, to prevent water ingress.
    But if you never submerge the breather, is there an issue?
    It is not a one way valve, it is a filter. The issue is the line is very fine and the filter too small and blocks leading to the diff breathing through the seals and causing premature failure.

    It needs to allow expansion and contraction of the air within the diff, an action that it two way.

    And yes though, for a plastic filter it’s just slightly overpriced!
    2010 TDV6 3.0L Discovery 4 HSE
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  8. 12th December 2017, 10:21 PM #8
    specwarop
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    Can almost buy the ARB Diff Breather kit for that price anyways...
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  9. 13th December 2017, 06:27 AM #9
    Aussie Jeepster
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    Quote Originally Posted by specwarop View Post
    Why do you need the expensive replacement? Its just a one-way valve right, to prevent water ingress.
    But if you never submerge the breather, is there an issue?
    The main issue is that the material Land Rover put in the old filter deteriorates over time and blocks the breather totally.
    You can replace it with whatever you like, but you need to get the old piece of crap off the line to let the diff breathe.
    Alan
    2012 L320 Range Rover Sport Fuji White
    REMLR 012
    No 5 Trailer ARN 177-295
    2006 Disco 3, 4L V6 Petrol SE Deceased Feb 26 2023
    SOLD Engineers Trailer - no id
    SOLD RAAF 231194 Perentie 110 GS - SIR ANGUS
    SOLD 4MP COY Series 3 FFR 30-209
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  10. 13th December 2017, 08:13 AM #10
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    Disco-tastic
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    Might be a dumb question, but are the rear diff and tc breathers a larger size?

    And would it be suitable to use a cheap fuel filter, a length of hose and a couple of clamps? The parts $90 from my local dealer.

    Cheers

    Dan
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