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Thread: Oil Catch Can for D4

  1. #1
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    Oil Catch Can for D4

    I realise this may have been done before, but has any one instaledl oil catch cans to late model Discovery 4 ? If so, any recommendation on a suitable oil catch can. Obviously concerned with carbon build up in engine - which seems to affect many diesel 4WD's - particularly older models thou ....

  2. #2
    Tombie Guest
    Not a big issue - bigger issue is to have your EGR closed and disabled.

    (Just don't mention that on the Caravanning forum) Oil Catch Can for D4

  3. #3
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    I chatted with the bloke (Bruce, I think) from Davis, and he reckons the breather hoses are at the back of the engine, hence only easily accessible with the body off. He also reckons the space is very tight regardless, but said he would look into it when he does his next body-off with the D4.

  4. #4
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    Quote Originally Posted by Hugh Jars View Post
    I chatted with the bloke (Bruce, I think) from Davis, and he reckons the breather hoses are at the back of the engine, hence only easily accessible with the body off. He also reckons the space is very tight regardless, but said he would look into it when he does his next body-off with the D4.


    Thanks Hugh Jars . I'll be interested in what Davis Performance thinks - as there is much chat in 4WD magazines where manifolds are getting carbon up - particularly on older model diesels - which obviously affects performance. Or are the magazines just pumping this issue up to support catch can manufactures/retailers ?
    Do fully synthetic oils have less carbon ( sort ) build up ?

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    Quote Originally Posted by Garfield View Post
    Thanks Hugh Jars . I'll be interested in what Davis Performance thinks - as there is much chat in 4WD magazines where manifolds are getting carbon up - particularly on older model diesels - which obviously affects performance. Or are the magazines just pumping this issue up to support catch can manufactures/retailers ?
    Do fully synthetic oils have less carbon ( sort ) build up ?
    Synthetic oils are definitely cleaner.
    Look up Pro-Vent on AULRO,many of us fitted them to out D2/Deefer TD5's,there is lots of info posted.
    Japanese diesels are much dirtier internally than ours,probably why the mags are onto them,they are needed!!!!!
    Andrew
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    Quote Originally Posted by LandyAndy View Post
    Synthetic oils are definitely cleaner.
    Look up Pro-Vent on AULRO,many of us fitted them to out D2/Deefer TD5's,there is lots of info posted.
    Japanese diesels are much dirtier internally than ours,probably why the mags are onto them,they are needed!!!!!
    Andrew


    Yes, most of the magazines like 4WD Action, 4x4 Australia, Overlander just concentrate on the old and new Japanese 4WD's. Which new 4WDs in the current market, except Japanese and LR, have low range gear boxes ? Not many !

  7. #7
    Tombie Guest
    Quote Originally Posted by Garfield View Post
    Yes, most of the magazines like 4WD Action, 4x4 Australia, Overlander just concentrate on the old and new Japanese 4WD's. Which new 4WDs in the current market, except Japanese and LR, have low range gear boxes ? Not many !


    Think you're mixing up your 4wd and AWDs there..(as commonly defined in Australia).. Oil Catch Can for D4

  8. #8
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    Firstly, "catch cans" are largely useless on TD engines, and therefore a waste of money.

    Properly designed closed crankcase ventilation (CCV) filters however are another matter.

    Whether it is worth fitting one is another matter, and largely depends on how long you plan to keep your vehicle.

    Basically when emissions legislation mandated that heavy diesels could no longer use open crankcase vent systems they all needed CCV filters otherwise inter/after coolers would clog and turbochargers would die a rapid death.

    This is largely due to soot deposits in the turbo(s) (from sooty oil) rather than any other material in the oil.

    I have been commissioned to do a comparative test of common CCV and catch can systems on the market - I will post the results here once they have been released.

  9. #9
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    Quote Originally Posted by isuzurover View Post
    Firstly, "catch cans" are largely useless on TD engines, and therefore a waste of money.

    Properly designed closed crankcase ventilation (CCV) filters however are another matter.

    Whether it is worth fitting one is another matter, and largely depends on how long you plan to keep your vehicle.

    Basically when emissions legislation mandated that heavy diesels could no longer use open crankcase vent systems they all needed CCV filters otherwise inter/after coolers would clog and turbochargers would die a rapid death.

    This is largely due to soot deposits in the turbo(s) (from sooty oil) rather than any other material in the oil.

    I have been commissioned to do a comparative test of common CCV and catch can systems on the market - I will post the results here once they have been released.

    Thanks isuzurover. I'll be interested in the results of your tests for CCV filters. I am not an expert in this area. Do the D4 DTV6 already have a CCV filter, or can you fit one ?


    p.s. plan to keep my D4 for at least another 4 years till it runs out of warranty.

  10. #10
    Tombie Guest

    Oil Catch Can for D4

    If you're only keeping it 4-5 years don't do anything.. no point... Oil Catch Can for D4

    I would also only service it at the factory services if that's your intention..

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