1994 E34 525 td to tds

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  1. 1994 E34 525 td to tds 
    #1
    Bimmer Fan
    Car Details
    b318i's Car Details
    Model of Car:
    318i
    Year of Manufacture:
    1994
    Transmission Type:
    Manual
    Car Body Type:
    Saloon
    b318i's Avatar
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    Jun 2010
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    Prishtina, Kosova
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    Hi,

    A friend of mine has a very nice 525td and he wants to go TDS, engine is in very good condition, so what parts will he need to do it TDS?


    Cheers
     
     

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    #2
    BMW Maestro
    Car Details
    doug1234's Car Details
    Model of Car:
    525tds
    Year of Manufacture:
    1994
    Transmission Type:
    auto
    Car Body Type:
    saloon

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    Bedfordshire
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    The main ecu on the tds has different mapping .

    The fuel pressure regulator (held by two bolts at rear base of pump) is different,you can fit a tds one but not fit a td one to a tds as it will not pass enough fuel .

    You can fit the inter cooler ,not sure if this will make much difference though apart from lower cylinder temps.

    Tds inter cooler fits below the rad,it slots in one side and the other has a 10mm bolt that secures it,you need hands the size of a six year old to get that bolt back in.

    Not sure if the td rad has the space under it for a cooler ??.

    There may be other differences but these are the ones I know of ,in essence the extra 28 horses of the tds does not sound like much but the extra torque/grunt of the engine makes it feel like it has twice the power of the td.

    Off the top of my head concerning the ecu's,the tds uses mainly 993 or 994 code numbers (these mean you need injector pump with same number to let it all work) I think the td uses the 995.

    Auto box ecu also has to be the same code number as engine and box communicate with each other.
    Maybe possible to chip it and fit the inter cooler ,this may require the tds fuel pressure regulator though.
     
     

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    #3
    BMW Maestro
    Car Details
    Brimstone's Car Details
    Model of Car:
    318is
    Year of Manufacture:
    1996
    Transmission Type:
    manual
    Car Body Type:
    coupe

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    TD and TDS use the same fuel pump, but the turbos are different. If its an auto you are probably knackered as td and tds gearboxes are totally different.
     
     

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