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Thread: Overheating Defender 300 Tdi - Did I damage it?

  1. 8th September 2010, 11:01 AM #1
    GyroLandy
    GyroLandy is offline Master
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    Overheating Defender 300 Tdi - Did I damage it?

    I have just replaced my engine with a newer one with less km's so I drained the coolant etc. and refilled.

    In driving it today I was checking the temp guage the whole time to ensure it remains in the middle. My attention must have gotten distracted because when I looked down again I saw the needle was just shy of the red. I stopped the vehicle immediately and could not have been driving it at that temerature for more than 2 minutes so what are the chances that I have picked up some damage? Where should I check to see whether any damage occurred?
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  2. 8th September 2010, 12:28 PM #2
    tab
    tab is offline Fossicker
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    Mine did the same thing,I think it just had some air trapped in the system, it came good. Perhaps I should have bled the air out with the plastic inpection plug at the top of the thermostat.
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  3. 8th September 2010, 12:47 PM #3
    Offender90
    Offender90 is offline ChatterBox
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    If just shy of red, then I wouldn't expect any damage occuring.

    When you checked under thr bonnet, was there any coolant spewing out of the expansion bottle? this would indicate coolant temps above 115 deg - if none i wouldn't lose any sleep over it. Even if there was, it doesn't mean theres damage to the engine. steel engines aare muchmore resilient than alloy

    If it's been cooking for longer, and at higher temps theres a chance the head gasket would be blown - check for coolibg system pressurisation when cold. Next in severity would be the head being warped (same symptoms).

    that said it doesnt sound like you have anything to worry about. below red is normal operating temperature. i would bleed the coolant properly and possibly invest in a high temperature engine alarm (engine monitor or the like)

    cheers

    bojan
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  4. 9th September 2010, 06:54 AM #4
    GyroLandy
    GyroLandy is offline Master
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    Thx, there was no coolant spewing out. Obviously when I opened the waterbottle to top it up with water there was some pressure and it took about 3l of water.


    I drove it after that and it remained slightly above the midway point.

    Probably needs some more water and ensure there is no air in the system.
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  5. 9th September 2010, 12:48 PM #5
    llandro
    llandro is offline AT REST
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    Tab.
    If you still have the plastic plugs, thermostat housing and radiator, please replace them with brass ones to save yourself some unexpected drama.
    The thermostat one on mine let go shortly after I replaced the first timing belt, perhaps I screwed it back in too tightly.
    However it let go when pulling hard up a steep hill, first indication was the cloud of steam from under the bonnet edges. Immediately pulled over (fortunately had room) let the engine idle for 10-15 secs. and shut down.
    Managed to get the broken body part out and screwed a cork in. Needed about 3l. of water, drove home (150km.) with the expansion tank cap loose and luckily no damage.
    Now well over 200k.km. and running like a clock.
    llandro
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