How to: fit a bigger Type4 1700-2000 oilcooler to a type1 engine

Discussion in 'Mech Tech' started by Zebedee, Aug 10, 2011.

  1. After having been told it would make no difference to the oil temperature i thought i'd give it a go anyway and decided to fit the larger cooler to my bay just to see how easy it could be done, plus i had the cooler and needed to replace my leaky one.

    The oil cooler from the 1700-2000 pancake engines in a late bay (or 2ltr T25 :shocked ) is approx 2cm wider than the 1600 one. Its got 7 rows instead of the 5 a stock 1600 one has.
    [​IMG]
    Stock 1600 (left), 1700-2000 (right)

    They both use the same mounting pattern though.
    [​IMG]

    The top 2 studs need removing and longer ones fitting. Threaded M6 rod works fine.
    [​IMG]

    The doghouse bit needs widening to fit the larger cooler.
    I marked out the cut line on the back of the fanhousing.
    [​IMG]

    And cut it off with a dremel tool with a thin cutting disc in.
    [​IMG]

    This is how much the doghouse needs widening.
    [​IMG]

    So i welded a 2cm wide strip of steel in.
    [​IMG]
    Not pretty but with a bit of grinding and a lick of paint it should look OK (not that its possible to see it once its fitting in the engine bay). :wtongue

    Even with the new widened doghouse theres still space bewteen it and the firewall.

    The triangular section of the doghouse also needs modifying to fit the extra width.
    [​IMG]

    Edge cut off. This is the gap that needs filling.
    [​IMG]

    New edge welded on. Again not pretty but its not gonna be seen anyway.
    [​IMG]

    This is what it looks like before the fan housing was fitted:
    [​IMG]

    I've now been using it for over a year now and can report that it does result in a lower oil temperature.
    Before my oil temperature guage was hitting 120 degrees C in summer at 55mph on the motorway, now at speeds in excess of that its just sits round the 100 mark.
     
  2. Good idea, what about blanking off the front heater pipe connections so all of the air is used to cool the engine, then you could use a late Bay snail fan to blow the cab heat through. ;)
     

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