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  1. #1
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    Default Disco 1 Auto: flexible cooler lines?

    As you guys know, the Disco 1 has metal cooler lines that join the Auto gearbox and the gearbox oil cooler. There is a small flexible high-pressure hose in each section. What do you guys think about having these replaced with (for example) braided or just fully-flexible high-pressure hoses?

    Mine has sprung a leak in the metal section near the gearbox - must be a cracked pipe. It could have been caused during the recent gearbox removal, but also since I drive a corrugated road every day. I'm thinking of just replacing the lines with fully flexible hoses.



  2. #2
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    Default Re: Disco 1 Auto: flexible cooler lines?

    The hydraulic shop can help you with new hose. They either put new connectors on re-use the old ones.
    Jakes Louw
    2012 Jeep Sahara Unlimited 3.6 V6
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  4. #3
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by jelo View Post
    The hydraulic shop can help you with new hose. They either put new connectors on re-use the old ones.
    Thanks for the input, jelo. My question, however, is not about where to get new hoses. It's whether you guys think there are any pitfalls from going flexible the whole way. As far as I can see, you know quite a bit about Landys, but not sure if you know the Disco setup. I might post a pic later if you need - but it's basically solid metal lines from the gearbox to the end of the front crossmember near the radiator... then it's a short section of flexible hose, then another section of solid metal lines. I want to take it off and replace it with a long flexible hose.



  5. #4
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    Default Re: Disco 1 Auto: flexible cooler lines?

    I would lengthen the flexible hoses without worries.
    Current - 2009 Mazda BT50 3.0CRDi 4x4 d/c
    Previous - 2005 Ranger 2.5 tdi 4x2 d/c (277 422km)

  6. #5
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Yep, just secure and protect.
    Jakes Louw
    2012 Jeep Sahara Unlimited 3.6 V6
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  8. #6
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by jelo View Post
    Yep, just secure and protect.
    Stainless braided hoses?
    Current - 2009 Mazda BT50 3.0CRDi 4x4 d/c
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  9. #7
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by Spiceman View Post
    Stainless braided hoses?
    Absolutely
    Jakes Louw
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  11. #8
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by Spiceman View Post
    Stainless braided hoses?
    This is what I'm thinking. Someone on this forum did it recently for their engine oil cooler lines. Can't remember who. These solid steel lines are extremely rigid and I suspect are giving more and more trouble as the car ages. If you feel how inflexible the flexible part is, you realise how much strain they are put under.

    With flexible lines, I can clamp them in a few places, route them away from the exhaust, and will probably be a lot easier to remove and refit the gearbox in future.



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  13. #9
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Looks like this will not be cheap, but worth it for peace of mind. Since the rubber section of the hoses is old anyway, I would have had to invest in replacement soon in any case.

    Perhaps I'll just leave a short metal elbow at the gearbox side; will cannibalize the gearbox ends of the metal hoses to make these. Then it will be braided hose all the way until under the radiator where the original rubber section joined the metal. It's not worthwhile messing with the bit from there to the oil cooler, since that doesn't need to flex at all and there are some tight bends which would cause more problems with chafing.



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  15. #10
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    Default Re: Disco 1 Auto: flexible cooler lines?

    One of my R380 pipes chafed through and it cost me a new gearbox, and I went the flexible route, too.
    I cut the ends of the pipes off at the radiator side and just past where they go under the gearbox at the back and replaced with oil resistant hose.
    I think going with full braided hose, while certainly worthy of bragging rights is a bit OTT, but what ever you use, it can be done.
    The cooler circuit is not high pressure on the R380, I'm not sure of the auto.
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  16. #11
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    Default Re: Disco 1 Auto: flexible cooler lines?

    So I hope we see some pics of this mod. Might be a worthwhile investment.
    HENK


  17. #12
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    Default Re: Disco 1 Auto: flexible cooler lines?

    You can use standard high pressure rubber hydraulic pipe, but I'd then make 100% sure that you have them out of the way say at the upper side of the chassis rail.
    Jakes Louw
    2012 Jeep Sahara Unlimited 3.6 V6
    Percivamus

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    Default Re: Disco 1 Auto: flexible cooler lines?

    Just do not use nipple and rubber hose with clamps, they do not last and make a spectacular smoke screen behind you as 5 liters of gearbox oil gets dumped on the exhaust, will make James Bond proud, I got the T-shirt. There is quite a bit of pressure in that line.

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  20. #14
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    Default Re: Disco 1 Auto: flexible cooler lines?

    All we use on are autos is push lock hose as it is not high pressure
    We use TAK-FLEX push lock and it is Max WP 28Bar
    you don’t need the hydronic high pressure hose
    we also use proper FTF fittings
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    Last edited by clivemd; 2021/09/10 at 10:27 AM.
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  21. #15
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by faniedup View Post
    Just do not use nipple and rubber hose with clamps, they do not last and make a spectacular smoke screen behind you as 5 liters of gearbox oil gets dumped on the exhaust, will make James Bond proud, I got the T-shirt. There is quite a bit of pressure in that line.
    I've always been impressed by the US AN type reusable couplings:

    Jakes Louw
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  23. #16
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Now this is something I could use! Just need to find a place to buy them.

    This means that I can simply buy a length of hydraulic pipe and make up my own. The advantage is, that one can get the lengths exactly right. Would be useful for the oil cooler and power steering lines too (hydraulic places never seem to get the length quite right, always add on a centimetre or two, and then the things don't fit back together again).

    Quote Originally Posted by jelo View Post
    I've always been impressed by the US AN type reusable couplings:




  24. #17
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by antvz View Post
    Now this is something I could use! Just need to find a place to buy them.

    This means that I can simply buy a length of hydraulic pipe and make up my own. The advantage is, that one can get the lengths exactly right. Would be useful for the oil cooler and power steering lines too (hydraulic places never seem to get the length quite right, always add on a centimetre or two, and then the things don't fit back together again).
    my brother sells the fittings at rocket88 hoses and FTF
    those fitting are used with SS braided hose as well as normal hose
    fittings are made for certain hoses and so on you also get push lock fitting
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    Last edited by clivemd; 2021/09/10 at 01:54 PM.
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  26. #18
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    Default Re: Disco 1 Auto: flexible cooler lines?

    I just did this for both engine oil cooler and gearbox oil cooler lines.
    FTF did the welding on the actual coolers for the male threaded adapter to receive the AN fitting.
    We ran braided dash 8 hoses on both cooling systems.

    On the gearbox and engine it takes an M20x1.5 to -8 adapter

    Can try get more and better pictures if interested.
    I did this because I lost one of the steel lines on my ACE system and did not want this to happen on gearbox or engine lines - that and im OCD with plumbing lines and could stand the look of the steel lines.

    Click image for larger version. 

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  28. #19
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Doing my 300TDi all fittings are FTF and push lock hose,
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    1995 300TDi Defender with VGT Turbo (stolen by my son now )
    2002 Defender with LS1 MS3 ECU, 4L80e, LT230 1.222, Lockers and HD CW&P, 35" with 4" Lift
    2005 Defender TD5

  29. #20
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    Default Re: Disco 1 Auto: flexible cooler lines?

    Quote Originally Posted by clivemd View Post
    Doing my 300TDi all fittings are FTF and push lock hose,
    Very nice, just finishes everything off so much nicer and cleaner looking.

    I was in the FTF shop recently and they now have the AN fittings for coolant hoses, my mind got running until I found out the pricing.

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