External oil cooler for AW70-transmission in a 240?

Discussion in 'Volvo 240' started by Vestman, Jul 23, 2003.

  1. Vestman

    Vestman Guest


    My ´85 240 with the AW70 automatic transmission might need an external oil
    cooler. I've heard that the one that's originally mounted on some 740's,
    fits the 240. Does anyone have more information on this, part#, pictures,
    guides...anything? There is virtually nothing about this on google.com.

    Lars Vestman, Denmark
    Vestman, Jul 23, 2003
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  2. From a point at sea, to the circles of your mind, this is Vestman:
    Why do you think you need one? Do you do a lot of towing, do you have
    overheating problems, or is it just time for a new radiator?

    I've got an external oil cooler on my 740. I don't particularly need
    one, but the internal one apparently developed a leak (in fact it was
    a false alarm) and I happened to have one lying around. It's just an
    aftermarket oil cooler bought from an accessory shop, about 5 inches x
    9 inches. It's connected by a couple of rubber hoses and screw cliped
    to the oil lines, and mounted in front of the radiator with zip-ties.
    I guess this is way over-specified, because the one in the radiator is
    only a small cylinder about 1.5 inches in dia. and 6 inches long.

    Someone on here mentioned that it might lead to over-cooling in the
    winter, but so far I haven't noticed any problems. But maybe your
    Danish winters are colder than our British ones.

    Given that a leak in the internal cooler could quickly lead to failure
    of the gearbox, I reckon on balance an external cooler is not a bad


    Stewart Hargrave

    Faster than public transport

    For email, replace 'SpamOnlyToHere' with my name
    Stewart Hargrave, Jul 23, 2003
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  3. Vestman

    Vestman Guest

    "Stewart Hargrave":>
    I have experienced that the tranny-oil have overheated twice (meduim brown
    colour), and that by medium quick highway driving after only about 40-70
    miles. After that I changed the oil of course, but it happened again... I
    think the tranny is a bit sick or worn eventhough it has "only" 151k miles
    worth of wear. It also shifts a bit roughly between 2nd and 3rd when pushed
    a little. Oil level has always been correct.
    Yep, but I've changed the cooler between the incidents, so I reckon that the
    cooler is of no guilt what so ever.
    Oh well, it usually gets down to 5 or 10 degrees of frost. I don't think
    that will become an issue.

    I just wanna extend the life of it instead of spending 2-300 £ too soon on
    an exchange unit.

    Lars Vestman, Denmark
    Vestman, Jul 23, 2003
  4. Vestman

    djtcz Guest

    The difference in cooling apacity may be hard to judge based on
    physiscal size. Air cooling stuff requires about 100 X more air flow
    than cooling water flow, and much bigger surface areas too.
    djtcz, Jul 27, 2003
  5. From a point at sea, to the circles of your mind, this is

    This is true, but don't forget that the temperature difference between
    oil and air is much greater than oil and water in a warmed up engine.


    Stewart Hargrave

    Faster than public transport

    For email, replace 'SpamOnlyToHere' with my name
    Stewart Hargrave, Jul 27, 2003
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