We had 4 sunroof 244s. (A 244 is a 240 sedan)

Not exactly the PNW here, but so far I've had not one issue with a leaking sunroof, so I was a bit concerned about all the disdain for them, especially from folks up your way.

I'm not saying we don't have rain. We now have 3 sunroof 244's. The one we don't have any longer was ruined by a sudden rainstorm, parked in an employee parking lot while a flash flood came along and totally inundated it.

So, not having any experience with sunroof leaks, I decided to use its carcass to investigate the drain system of this '91, because the mud filled in the sunroof while in the swollen Jones Falls.

There are drains run from each corner of the sunroof pan, the rear ones being virtually inaccessible without removing the headliner. The drains are clear vinyl tubing leading to the A-pillars from the front, and Y's with the rear window drain in the rear.

Here, you see a speedometer cable insert used to clear the drain. A bike brake sheath sounds a bit stiff to me, but same principle is at work. I got curious about the rear drains, so I gently blew some air backward from the trunk tubing and listened for it with a long stethoscope before fishing with the flexible speedometer cable.

I think there could be a problem where the "seal" passes water fast enough that the drains have trouble keeping up, or the trough overflows. I put seal in quotes, because it isn't really water tight, but just enough barrier to slow down the ingress, more or less like the window scrapers on your side windows. I imagine if this gets bad enough, it could overwhelm the drains whether clogged or not, but as I said, no experience here with that.



Below you see the tools I brought to bear. The long tube adapted a shop vac to snake under the roof in the sunroof storage pan. The air mattress pump helped me locate the upper limit of the rear hoses in the roof.



Below you see the exit point in the door jamb from the A-pillar, just below the wiring tunnel.



Here you are looking in the trunk just past the cover for the fuel tank filler plumbing at the Y-connector joining the rear window drain.


--
Art Benstein near Baltimore

“Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.” - John F. Woods