the plastic pipes..
particularily at the front ends of them, near the radiator, are
notorious for having the a metal insert slip out of place, out of the
end of the plastic pipe....causing a leak ..

and sometimes, a sudden large leak.
I've had it happen out on the road in a seemed-just-fine personal
Vanagon, and I've seen a wonderful Vanagon in a junkyard with fried
engine for  this Exact cause.

you might keep an eye on this spot, you might pull the hose off and
're-do' in there, etc.
GW sells a kit I gather, as well.

fwiw, if I was going to attempt to re-glue the metal insert back into
the plastic pipe, I'd use Marine Tex ...one of the best two-part epoxies
you'll ever find.

in any case..investigate that spot further I suggest !

Scott

On 3/31/2016 4:26 AM, David wrote:
> Ok, the hunt is on...completely topped up system... Visual inspection
> reveals externally, at the worst a rusty spot on one of the forward coolant
> plastic hoses... really? with it idling in the drive, with me revving it,
> it's still bone dry on the outside :-/
>
> I guess more time needs to pass and need to see more coolant losss...
>
> Probably time to replace plugs so I'll endeavor into that and maybe that
> will tell me something...Still have to get a pressure gauge on it and see
> what that reveals...if anything from the outside...
>
> Oh yeah, and initial test with running the van cold fo 30 secs to see if
> any burps come out from combustion getting into coolant turned out
> negative....no bubble, nada, nuthin...
>
> Will post more as I go through this...
>
> Dave
>
> On Wed, Mar 30, 2016 at 10:59 PM, Phil Zimmerman <philzimm1@shaw.ca> wrote:
>
>>> From: David [mailto:fjazzbass@gmail.com]
>>> Any advice is welcome... do we have to check for exhaust in the coolant?
>>> Dave
>>> 85 1.9 GL MT
>> Dave,
>>
>> Another internal leak symptom the check if you have not located the source:
>> Pull all four spark plugs, in order and compare their electrodes.
>> A clean electrode, if present, will show itself compared to the normal grey
>> to black oil/carbon of combustion. A clean spark-plug electrode is a sign
>> of
>> coolant getting into the combustion chamber.
>>
>> Subaru coolant conditioner has worked wonders for a number of folk on this
>> list.
>>
>> Good hunting Dave.
>>
>> Phil z.
>> On his rock off the west coast
>>