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Thread: Coolant Loss - Engine Overheating

  1. #1
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    Coolant Loss - Engine Overheating

    Hello All

    I've written up my recent saga regarding inlet manifolds here and no sooner were they replaced but the coolant crossover assembly under the throttle body split while towing a 2 tonne camper into Springsure, Central QLD today. Warnings were 'low coolant' and then 'engine overheating' (the latter briefly at least). With the use of some bailing wire and zip ties I managed to hold the assembly together enough to fill and hold some water and limp into town (albeit the water leaking quickly out again).

    Will now source a new assembly from MR Auto tomorrow and get it shipped, fitted and filled with coolant ASAP. I don't plan to start the car again unless I absolutely have to (the campsite we are on can only accomodate us for 2 nights!)

    Engine sounded OK with no further dash warnings other than 'low coolant' on the limp into town but after reading some horror stories on here I'm worried about any damage yet to be identified. Does anyone know what I should be checking for on pre or post repair? I've got an IID but haven't pulled any codes as yet.
    Discovery 4 2014 Ipanema Sand SDV6 HSE
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  2. #2
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    There won’t be anything to check.
    It will all depend on how much “engine overheating” took place, how hot it actually got etc.

    Don’t drive it until you can fit the part. It’s an easy job.

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    BradC is offline Super Moderator
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    Quote Originally Posted by Tombie View Post
    It’s an easy job.
    Which is not something often heard in relation to a D3/4.

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    Quote Originally Posted by BradC View Post
    Which is not something often heard in relation to a D3/4.
    Often....ever.
    2010 TDV6 3.0L Discovery 4 HSE
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    I carry one of these fittings as a spare as people have reported them failing before. But I'm wondering whether I should just fit as a precaution now based on time / ks travelled.

    What are people's thoughts - when's it time to change it out as preventative maintenance?
    2011 D4 3.0 SDV6
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    Quote Originally Posted by Ferret View Post
    I carry one of these fittings as a spare as people have reported them failing before. But I'm wondering whether I should just fit as a precaution now based on time / ks travelled.

    What are people's thoughts - when's it time to change it out as preventative maintenance?
    Just fit it. If you change it every timing belt then you’ll be all ok.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

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    Coolant Loss - Engine Overheating

    Quote Originally Posted by DiscoJeffster View Post
    Just fit it. If you change it every timing belt then you’ll be all ok.
    Agree, 7 years or less. There is also a plastic fitting where the hose connects to the engine block. I’ve also got this for next belt time but it’s a single piece whereas the top unit is joined / glued and splits there. The block fitting a real bugger to access.

    For my second timing belt change (half life of car) I’m thinking to go the whole hog on new radiator, condenser, thermostat, water pump, top and bottom hose, oil cooler and these plastic fittings since you are pulling things apart once and once only.

  8. #8
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    i had the exact thing happen to mine the only code that came up was coolant overheated. i has able to put it on a flat bed and take it my my local indy, they did a pressure test on the system, i guess to make sure no other damage to the cooling system, but all good refilled replaced the damaged part and no issues for the last 25000 km.
    2010 D4 3litre twin turbo brand new motor 5km old on a 100,000km car. Kaymar rear bar, ARB front bar, Hannibal roof rack, Hella Predator Spot lights, long rand fuel tank, Traxide battery management. touring weapon.

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    Yep, seems like a common issue but of course I didn’t know that until it happened and read the numerous posts. Preventative seems to be the way to go if you’re on a long trip, especially towing.

    MR Auto are sending one today and hopefully fitted and fixed in a day or two.

    Praying there’s no further issues or over-cooked motor.
    Discovery 4 2014 Ipanema Sand SDV6 HSE
    Defender 110 2022 Fuji White D300 SE
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    Coolant Loss - Engine Overheating

    Quote Originally Posted by Sol View Post
    Yep, seems like a common issue but of course I didn’t know that until it happened and read the numerous posts. Preventative seems to be the way to go if you’re on a long trip, especially towing.

    MR Auto are sending one today and hopefully fitted and fixed in a day or two.

    Praying there’s no further issues or over-cooked motor.
    Fortunately it seems to emerge as a small split, slow leak therefore slow manageable loss of coolant before letting go big time. Ignore any coolant loss at your peril

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