(85 740 GLE, non-Turbo) Timing Belt Break - Chances Of Engine Damage

Discussion in 'Volvo 740' started by DevoFan, Sep 10, 2003.

  1. DevoFan

    DevoFan Guest

    To All,

    I have a 1985 Volvo 740 GLE Sedan (non-turbo) with approximately
    228,000 miles. My son was driving it last weekend, going around 35
    mph, when all of a sudden he lost power and the engine stopped. He did
    not notice any unusual or loud noise. He coasted into a parking lot.
    Later we took a look. The car made a high whiney sound when attempting
    to start it. There was no knocking or any sound of friction coming
    from the engine.

    So we had it towed to a mechanic who informed us the timing belt
    broke. They will not be able to assess possible engine damage until
    they replace the timing belt. Now my questions:

    (1) In your experience with Volvo's, particularly my model, what are
    the chances of significant engine damage resulting from a timing belt
    breaking while driving the car?

    (2) Did attempting to start the car afterwards possibly cause damage?

    (3) What kind of damage might you expect based on the symptoms
    described above?

    Your help and responses will be greatly appreciated.

    Best Regards,

    Fargo, ND
    DevoFan, Sep 10, 2003
  2. DevoFan

    Rob Guenther Guest

    It's a non interference engine, from the posts I have read it's basically
    you get a new belt, make sure all the timing marks are lines up and
    whatnot... whatever is involved (I've never done it, just read it many time)
    then you are good to go again.

    Now, if you had a 960 like my family does, you would be out thousands
    because you would be needing valves, remachining jobs on many other parts,
    possibly totally new parts... The 960 has an interference engine tho, and
    the timing belt must be done religiously every so many KMs. For your car its
    good to do it every so many years, or miles, but it isn't detrimental when
    it snaps.
    Rob Guenther, Sep 10, 2003
  3. DevoFan

    DevoFan Guest

    Hi Rob,

    thank you for the information, especially the good news that it is a
    "non-interference" engine.


    DevoFan, Sep 11, 2003
  4. DevoFan

    G Klein Guest

    Just have your mechanic install a new timing belt &
    away you go ( Of course have him line up the timing
    marks 1st)
    G Klein, Sep 11, 2003
  5. DevoFan

    Duong Nguyen Guest

    Everybody keeps telling me that B230 is non-interference but in my
    experience that is not true. My 88 240GL with a B230F suffered so much
    damage when the timing belt broke that the mechanic advised me to junk
    it. It was running beautifully prior to that.
    Duong Nguyen, Sep 11, 2003
  6. DevoFan

    James Sweet Guest

    Maybe you had a weird cam in it? I've rotated the cam 360 degrees with the
    crank at top dead center and none of the valves hit, that was an '87 though.
    James Sweet, Sep 11, 2003
  7. If the head had been machined too much, that could possibly allow it to hit
    a piston... but other than that (and the weird cam option posted earlier) it
    shouldn't hit.

    Anthony Flint, Sep 13, 2003
  8. DevoFan

    Alex Zepeda Guest

    Was it really a B230F?

    At least before leaded gas was banned Australia got the B230ET, and so I
    assume the B230E. Perhaps your mechanic didn't even bother to look at the
    car, and just wrote it off. The E engines got higher compression pistons
    and hotter cams, both of which could easily be non interference from the
    factory.. but with carbon deposits or head milling could easily become
    interference engines.

    I know for a fact that the B21FT and B230FT engines are not interference
    engines. I've rotated the cam on mine many times with the crank far out
    of tune, etc.

    - alex

    '85 244 Turbo
    '84 245 Turbo
    Alex Zepeda, Sep 14, 2003
  9. DevoFan

    Duong Nguyen Guest

    It was definitely a B230F. No modification that I know of. As for the
    mechanic I dont't really know. Wouldn't do his reputation any good if
    I found though.
    Duong Nguyen, Sep 18, 2003
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