[Monkey Wrench]

thanks for that, i never considered the blower fan to be a safety requirement, That's interesting.
ive seen the motor in my 740 fail more than once due to the under dash position, and leaks from under the grill between hood and windshield into the motor. I was finding the motor partly submerged by water which was being contained by this ducting.
it has a vent hose that leads into the ducting from around the motor. Lat time i just left that off so if it got wet the water had a way out and onto the floor as it seemed to be trapping water within the covering.
ill remove the grill so I can see from the top and maybe seal it up better from the topside too. there may be a plastic cover to shed water and maybe its damaged or full of debris, or something.
I think most of the problem was with the seal around the motor, the OEM one has a different motor flange so Il make it fit and seal it up with windshield goop.
ill try to reconnect the vent hose. maybe its better as the vent may help dry it up if it runs continuously.

I wasn't in a rush except today my newly replaced Volvo 240 master cylinder leaked all its fluid on my way on to work today.
Pedal felt low and then i found a constant drip from between the master cylinder and brake servo. it actually emptied the whole reservoir, it came with a new reservoir too so who knows.. maybe the new seals on the new reservoir leaked or maybe the piston seal was just no good..

I guess the rock auto 18 dollar closeout special wasn't such a deal so I got a new one on order for tomorrow's fun. Ill throw the volvo wagon on the road and bide a bit of time to bleed brakes etc on the volvo sedan..

had a look again at iunch,, yes I think the new volvo master has a bad seal between the new reservoir and the master cylinder.. it was still pushed down tight. i put some tie wraps anyway, maybe they will hold it tighter..
Il fill it and nurse it home carefully, then deal with it properly.

the master cylinder looks a lot lie the 944 one, bit different angle on the line fittings.. I have a new one in hand ready to go in my 944 too. thought Id replace that in the 944 before I go far with other stuff.. Calipers are stuck and need servicing anyway..

I think Ill start to tie wrap the things down to prevent the seal between master and reservoir from separating. maybe that's the issue, I put a bucket under it.. didn't want to get into it at work..

speaking of dangerous, you'd think they would use a more positive seal between the reservoir and the master cylinder.. the volvo one just pushed down on top.. not sure if that's a danger in the 944 but Ill certainly be more aware now. i think when I compared the two it was similar but different sized holes. i think the 944 has one larger and one smaller. volvo has 2 the same size.. very similar in design so I think same "could " happen to a 944 causing suddenly empty.

in my volvo 122 s since it is single circuit, so some put a float thing with an alarm, so that if fluid gets too low, alarm sounds.. Not bad idea.

the float and the idea, was taken from some other car that has the float switch device.. I dont know what car uses one.. but good idea.

I ordered a new master for the volvo, it'll be at the door tomorrow, it appears the problem was just the bottle seals though,, the top of the master cylinder. they leaked. the reservoir is new and didn't come up or off from the master cylinder.. ... I tie wrapped it down anyway..
maybe the new master will at least have a new set of those seals. I'll pull it off when I'm home.. need to fix that up properly and then bleed brakes again..

it was wet under the bottle so it appears it wasn't the piston seals that leaked. ( then it would be wet lower down) when it failed recently it was bypassing internally,, the pedal slowly went down.. i think that's ok now..

I wonder if there is some sort of glue one could put on the seals that is brake fluid compatible.. I cant blame my new 18 dollar master , except those seals were new too and the bottle was installed already It appears it was just that rubber seal connection which seemed to be the fault area. - causing no bloody brakes !