'95 850 intermittent coolant leak

Discussion in 'Volvo 850' started by blurp, Jul 10, 2007.

  1. blurp

    blurp Guest

    Hi all,

    My 1995 850GLT has developed an intermittent coolant leak that appears
    to be coming from the connection point between the underside hose and
    the expansion tank. I have disconnected the hose and inspected it (it
    looks fine) and the expansion tank (also seemingly fine) and have
    replaced the clamp with a new one tightened as much as I safely can
    without damaging the expansion tank.

    I find most of the coolant leaks out when I come to a stop and it will
    dump about a cup of coolant out, sometimes more. I've also found that
    if I release the pressure by opening the cap once I've parked it
    significantly reduces coolant loss.

    My question is this... could it be the thermostat? I had a problem
    with my 240 leaking around the water pump gasket when the car was shut
    off and replacing the thermostat solved this but I don't know if the
    850 is similarly vulnerable or if I should be looking elsewhere. The
    radiator is less than 1 year old and the temperature guage never
    climbs beyond the 3 o'clock position.

    Oh, one other thing, it seems to have started about 2 weeks ago when I
    found that the top of the expansion tank filler cap had sheared right
    off, exposing the valves beneath. Once I replaced the cap (from the
    dealer) it started leaking out at the clamp.

    There seems to be a significant pressure build-up.

    Thanks in advance for any ideas, I hope to start looking at it this

    blurp, Jul 10, 2007
  2. blurp

    Henry Guest

    Everything's pointing to the cap, innit? Is it possible that the new cap
    is defecto?


    Henry, Jul 10, 2007
  3. blurp

    blurp Guest

    It's possible... how would I test that?
    blurp, Jul 10, 2007
  4. blurp


    Jan 11, 2012
    Likes Received:
    I have exactly the same problem with my '95 850 estate. Any ideas? Did you get it sorted? I'd be grateful for any pointers.

    (The temperature gauge remaining at 3 O'clock is particularly galling. My car overheated and stalled in a busy high street; although I was aware that the coolant level had dipped and was watching my temp gauge I had no indication that it was overheating until it was too late.)
    mymatemymart, Jan 11, 2012
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