So, I spent some time on the Civic this past weekend. Mostly, I've been trying to determine where my water intrusion issue was coming from. I've discussed this quite a bit more at length in the "
Mother Of All Whore Threads Non-VIP Edition v.1" thread but figured since I actually did 'something' on the car, this thread deserved an update.
For those who aren't in that other thread on the regular, I've been having an issue where, when I leave my house, and make that initial turn out of my driveway, I hear sloshing from behind the dash, and get water dripping/running down into my footwell. Additionally, my driver's footwell carpet is almost constantly soaked. The most common culprit of this is said to be sunroof drains; however, several months ago, I verified these were clear and couldn't reproduce the issue, so I was confident it was not the drains. And, what was weird about the situation was that when I drove in the rain, I wouldn't get leakage into the car; yet, when I'd get into the car in the morning, the footwell would be wet/soaked and I'd have the sloshing effect previously described.
Anyhow, on Saturday, I attempted to figure out where my water intrusion issue was coming from and began by pulling the front cowling under the hood to look for possible problems and sources of water (since the cowling is a fairly large area to hold a decent amount of water). Not really seeing much, I decided to focus more inside the cabin. Again, not much could be seen, but, I thought, if I pulled the dash, I’d get a better view. So, that’s what I did (what a pain). I wasn’t able to get the dash completely out because of the electrical, but I did get it out about a 6-8" from the firewall, enough to basically look entirely behind the dash as a way to see what was wet/rusted. The footwell was wet, but the carpet up behind the pedals and firewall insulation were all dry, so it was even more irritating to narrow down (although, I hadn’t driven the car in a couple of days). But, this bracket looked more corroded than the others (and more corroded than I thought it should be in the interior of the car), and right on that ledge on the upper portion of the firewall.
And, when I looked at the ledge, it looks wet (so, it has to be coming from above it, right?).
So, at this point, I'm semi-convinced it is either sunroof drains or the windshield seal and I focused on the sunroof drains because there is actually something I can sort of attempt to do about them. If it is the sunroof drains, it wasn't how I would thought they would leak since I had previously tested them and verified they were clear. And, when I drove in the rain or when I was testing them, I didn’t get any water in the cabin. It was only when I’d make that first turn while driving, I'd get that audible and visual indicator that the car would get wet. I’d make that turn, like when leaving in the morning, and I’d hear sloshing from in front of the dash and then a bunch of water would run down the back of the dash and my dead pedal would get wet. And, the carpet, particularly the driver’s footwell is constantly wet. And, with the dash basically removed, and I could see where rust is accumulating on brackets, I think it is leaking from the seam where the 2 parts of the sunroof drain come together.
If this is the problem, I think water is seeping out of there, resting on a ledge on the firewall (I park on a slight downhill), and then dumping in the car after I turn and the car goes level. At least that is what is making sense at the moment. To test this, I plugged the drain and filled it with water, sure enough, seeping out at the seam between the parts.
It took a bit to separate the two pieces for the front drains (I haven't messed with the rears yet but do plan to at some point) so I think there is some mild sealant or glue that has degraded. I used some RTV to reseal the 2 halves and did a test on each after letting them dry, held water without leaking. What's weird is that when I had the sunroof drain out and poured water through it without closing the end, I didn't notice any leakage between the halves (maybe it wasn't enough to overwhelm the drain, but that is a bit of a guess). And, I know I verified the drains were clear a few months ago but still, somehow, was getting water buildup in the car (this is partly why I was convinced that the problem wasn't with the sunroof drains before). Either way, I know they shouldn't be leaking now; however, I wonder if I'm giving myself a false sense of hope here and that I haven't actually found/fixed the problem. I don't see much of anything that goes through the firewall above that ledge (although, it is masked by the insulation making it more challenging to find). So, I'm curious if I should be looking at anything else? I guess it doesn't matter too much as I put the car back together; but I plan to monitor things to see how it goes, if it isn't the drains now, the only thing I can think of will be windshield seal, I haven't ruled that out yet. If the carpet continues to get wet or hear that sloshing when I first start driving, I'll start looking at the windshield seals more closely (I did drive around for about a month a little while back with the A-pillar trim removed and never noticed anything coming in around the edges of the windshield); I did have the glass changed about 2yrs ago but I do not recall if this issue started around that time or later.
A separate but semi-related issue, while I had the center console removed as part of pulling the dash, I found what's left of my shift boot retaining clip (something that has always been "missing" since I bought the car in 2018). This is what was left of mine:
@webby came through clutch with a link to a printable replacement part on Maker World
here for anyone that is in need of this same thing. I printed a couple of these last night; I did one of each type. I printed these out of ABS which I’m still learning to get to print semi decently (my printer is not enclosed). Unfortunately, while I was cleaning the printing slag off the 2-prong one, it broke (one of the tabs). I assume the designer made this one as it is likely more user friendly than the 4-prong one (on the 4 upper tabs, it either has 2 or 4 “teeth” to grab the holder on the shift lever).
Oh well, good enough to give it a go at least using the 4-prong one. And, certainly better than what I had before which was absolutely nothing. And, I took a few minutes to install the 4-prong one into my car. I did manage to break it in the same way the 2-prong one did when I was pushing it into the boot collar. But, I figured, F-it, it’s good enough for now and I’m not really out anything so let me give it a go:

Guess I need to get better at printing ABS. Or, maybe redesign this part with slightly thicker tabs to be more durable…? Or, is it just because it is printed, it will always be a bit brittle?
Anyhow, busy weekend of Civic stuff that was all non-maintenance related and accomplished very little overall. I wish it was more fun knowing I solved a problem though.