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
evening.

Cheeps,
blurp

blurp <clubshub@hotmail.com> wrote:

> 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.

> ... if I release the pressure by opening the cap once I've parked it
> significantly reduces coolant loss.
>

....

>
> 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.


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

cheers,

Henry

On Tue, 10 Jul 2007 21:19:40 +0300, henry999@eircom.net (Henry) wrote:

>blurp <clubshub@hotmail.com> wrote:
>
>> 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.
>
>> ... if I release the pressure by opening the cap once I've parked it
>> significantly reduces coolant loss.
>>
>
>...
>
>>
>> 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.
>
>
>Everything's pointing to the cap, innit? Is it possible that the new cap
>is defecto?
>
>cheers,
>
>Henry
It's possible... how would I test that?