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Thread: 300 tdi Defender overheating ?

  1. #31
    curnowdj Guest

    Injection Timing?

    With all the things done to solve this overheating problem would injection timing have any influence on this? I guess the only way to check is to physically look at the timing belt to make sure all timing marks line up.

  2. #32
    Join Date
    Oct 2011
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    Sawyers Valley
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    Timing is fine, have just changed belt etc, but no change in getting warm. Doesn't seem to matter, fourth or fifth gear, still climbs at to the 3/4 mark sitting on 85-90kmh.

    Summing it up, I have replaced everything to do with the cooling system, even the heater element, but no change to the symptoms. I will test the coolant for exhaust gases though it doesn't use any coolant so cant be anything major. Will install a more accurate temp gauge and monitor.

    I'm pulling the engine out this weekend to replace clutch so a closer look at air flow will be good.

    Cheers

  3. #33
    Join Date
    May 2006
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    Yack
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    Quote Originally Posted by djam1 View Post
    For the benefit of those in the future

    We installed a Dayco Thermostat DT50A 82 degrees C
    The tropical modification for the radiator (partially blocking off the half inch bypass hole in the radiator) for reference as a proof of concept we used a tubeless valve stem that had been shortened and the valve removed pushed on a piece of rod into the hole.
    This will be soldered up in the future apart from a 2mm hole

    The end result is its much better probably 5 degrees cooler on average

    Ongoing testing will be done next week when the vehicle is used out bush.
    Seems like a good result. Can you tease out the individual effects of the new thermostat and the modded radiator?

    Just re the tubeless valve stem - I assume you had to pull the radiator apart to fit that? If not can you give more detail on how you did that please?

  4. #34
    Join Date
    Jan 1970
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    Melrose SA
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    To be honest I cant let you know what the individual effects were as it was a little unclear specifically what had the greater effect.
    We installed the tubeless valve stem by forcing a piece of rod in the bulbous end and pushing it into the hole in the divider tank through the filler plug at the top of the radiator. Read the valve stem goes down and it clips into the hole perfectly the rod was then pulled out.

    My gut feeling is that the tropical mod had the greater effect I haven't heard from the driver since he left so am not sure what is going on with it now.

    Quote Originally Posted by edddo View Post
    Seems like a good result. Can you tease out the individual effects of the new thermostat and the modded radiator?

    Just re the tubeless valve stem - I assume you had to pull the radiator apart to fit that? If not can you give more detail on how you did that please?

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