What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Ugh. water leaking inside, AGAIN and YEt AGAIN!!!!

badmix

badmix

1/2 ton status
Joined
Nov 7, 2004
Posts
4,474
Reaction score
165
Location
West Virginia
This is starting to get really old. I went to check my truck today, havent drove it in a week, there was 2 big ass puddles behind the drivers and passenger front seats (where the back passengers put their feet). I know ive still got a lil leak from the front, which I think I finally got taken care of *(read below).

ANyways, Ive been pouring water on the top of my truck and dont see any water other than from the front which I know about. I just cant see enuff water coming in to literally flood the rear compartment. :(

*Found out water was coming thru the firewall where the heater hose and heater core connect. there is a channel from the upper part of the fireway that is angled down to the top of the hose. not sure what the purpose of this is, but it puts water directly ontop of the heater hoses. I got some stuff and plugged it up. all good so far. I also tightened up the screws holding the kickpanel and seal on the pass. side. that should help leakage there. but not sure about the puddles in the back. I dont see any water coming thru the topper seal. no signs of water ever coming thru, etc. Headliner is dry as well.
 
My top seal(s) were leaking, along with whatever the gunk is GM used to channel water away from the inside of the truck where the topper meets the body on the bedrail was missing.

Water would come in under the edge of the topper (between the two seals), run down the inside of the interior panel and/or the sheetmetal (guess it depended on if the truck was on an angle or not) then puddle on the floor. Replaced the seals and the gunk and no issues since. Only reason I figured it out is because I had the interior panels off and saw the water tracks down the sheetmetal.

Never saw water running in, just saw the resultant puddles after bouts of rain.
 
I dont have panels. I had interior line Xd. Ive been watching that area your talking about. I just dont see anything coming thru. I know ive got a drop or two coming from drivers side sliding window, but its minimal and wouldnt explain the puddles being on both sides. Truck is on level.

Im not getting any water thru the topper, but did find a stripped screw on the top leading edge where the topper meets the top of the cab. How can this be fixed? The PO put a plastic dowel in there to make the screw/bolt tighten up. :doah:Id like to get this fixed properly. But im still really sure that my water issue isnt coming from this. there was no water dripping and the seals dont have water stains, etc.
 
Only other real common areas for water to come in are the back window (tailgate) and the lower corners of the windshield. If it's on the level though, pretty unlikely for it to run from the front window to the rear floor. You'd think there would be water tracks if it's coming in the rear window too...

Of course, I took out the plugs GM has in the floor where the puddles form. It will still puddle up, but at least it can get out if there is enough of it.
 
My top leaks at each lower corner where the bedrail & cab meet, looks as though the glue that holds the body together has deteriorated allowing water to run down behind the panel that the seatbelt is bolted to. I can see water marks between the 2 bolts just below the retract housing for the seat belt.

Also, check the grommet on the retractor button through the door jam.

Cheers
 
Yea, I know where your talking about. When I poured water over the topper and cab, none came in anywhere near those areas.

Is it possible for enuff water to come out from under the dash to flood the back floor area? I find it hard to believe that much water could get thru. I need to take it to a car wash and have someone inside with a flashlight and really check things out. I can understand a drop or two from a 20 year old plus truck, but those puddles in the back are enuff that I cant store anything back there for fear of getting it water logged or ruined. :(
 
badmix said:
Yea, I know where your talking about. When I poured water over the topper and cab, none came in anywhere near those areas...

..I need to take it to a car wash and have someone inside with a flashlight and really check things out...
Click to expand...



After a big storm i could see the water marks, but couldnt reproduce the leak when i was pouring with a bucket, so i had someone sit in the vehicle and i used a water hose..i sprayed every crack, crevis and seal until i was able to get water to flow over the water marks from the storm. Then i was able to pinpoint the leak, for me even a few buckets of water wasnt enough to make its way through.
 
With the dash in place it's a bit difficult to see up under there, especially if you have any kickpanels.

I think it is possible, but you'd expect to see more evidence of it. I believe the floor is essentially flat from forward of the front seat to the rear, so puddles in the back shouldn't be any more likely than in the front, unless maybe excess is draining out the door seals at the bottom, as they are designed.
 
That is the thing. When I poured water over the cowling in the front and water would drip down the firewall thru the heater core area and the kickpanel, it would be slow running and it would run out of the lower door area. I since fixed the heater core leaking area and found that the kick panel was loose, thought I had it tight, that helped alot.

I can understand maybe water puddling in the right side of the truck as to where is all the water, but for it to puddle right behind the drivers seat has got me. IMO, its got to be coming thru the topper seal somehow.

LIke I said, ill go to the carwash and have someone sit inside and try and pin point it. Replacing seals isnt that big a deal, just figuring which ones to replace is the issue.

I plan to pull the topper sometime and replace the seals eventually, but just want to make sure of where this water is coming in at.

The puddles in the back were the worse ive ever seen. They were towards the middle of the tranny hump in the back, not to the sides where the lower seat belts mount, that area was dry and no evidence of water. (my truck is dusty inside, so signs of water are apparent as those areas will be clean and not dull/dusty)
 
That is where mine collected too. I suspect the floor is a bit less than even there.

I don't drive my truck much, so it's not like I ever got a chance to see the puddles forming. I don't think it ever came in "fast", as I have no carpet, dash, or side panels, and never noticed it coming in while it was raining. :(

Car wash might have enough pressure to speed things up. :)

Here's a (messy) idea that I've done before...you can use vaseline to temporarily try and stop leaks. I used it in the windshield corners at one time, and it worked for a bit, but doesn't hold up in sunlight/heat of course.

Other option is to take a tarp, and cover enough of the vehicle so that the topper seals (for instance) won't get wet. See if that stops the problem.
 
Check the doors, do they slosh when you quickly shake them? If the factory drain holes plug up from debris and rust collected water could seep by horizontal trim screws into your interior. Drill 1/4" drain holes in the bottom ( front and back ) of the doors.
 
A place that I have seen issues, and it is not going to be apparent from the inside, but could cause this issue, the small seal for the dome light. On the back of my cab, between the two seals, is a small grommet that the interior dome light uses. What I have seen is this grommet missing, combined with a leak in the top to header seal, it allows water into the half cab posts. This could hide a leak and still allow the water to puddle on both sides of the back of the cab.

Just something to check.
 
Then wouldnt water be puddled on the SIDES , where the seat belts mount? My puddles were in the center, just on both sides of the tranny hump in the back. I saw no evidance of water coming down the pillars or anything on the sides of the truck.
 
badmix said:
Then wouldnt water be puddled on the SIDES , where the seat belts mount? My puddles were in the center, just on both sides of the tranny hump in the back. I saw no evidance of water coming down the pillars or anything on the sides of the truck.
Click to expand...
Is the trans hump getting wet on the top then the water running down the sides of it? If so that would be what I see, and unless I completely let the water at the car wash just push into the seals, a few buckets will not show my leak.

In my case there is a dent in the weatherstrip on both top to header, and header to top that allows a small amount of water to drip in during heavy rain. It will produce the same effect, at least on mine it does, and I know that those two seals need to be replaced on mine. My only problem is that I don't want to do the on cab seal until I get the body painted, the on top seal (top to header) is getting replaced with the paint work and repairs I am working on later this month.
 
My 72 Jimmy was getting puddles on the floor. I just sat in it during a heavy rain. I soon saw where it was coming from. Hitting the seals at a car wash my show leaks that may/may not leak during rain.
 
Ok...I got the front leaking under control. We had a hard rain today and I drove my truck. I found out why I had puddles behind the front seats. Water is geting in the BACK of the blazer and when I stop, its running forward and puddling at the low point of the floor.

So NOW what do I do? What areas should I be checking in the BACK of the blazer by the tailgate? What is the main places it comes in? By the time I got back in the truck, the rain stopped and I still cant see where its coming in. THe black LINE x makes it kinda hard to folllw water , etc.

I removed the seal plate in the back (part that holds the rear carpet) would this effect anything? I also replaced the seal going around the tailgate and it seems fine.

any suggestions???????
 
Definetly not coming from the side windows. Ive got alot of dust/dirt on around that area and water would show up by washing the dirt away or changing its color. That area look fine. Is there anyways, for water to get down thru the rear window and out the access panel on the tailgate itself?

I know I need to do the carwash test again, but just want to get ideas of where to check. THere is only the seal around the top of the topper and the topper to bedrail seal really.
 
Ok, did some water testing. wasnt hard to figure out where its getting into the truck.

Its coming thru the ACCESS PANEL on Tailgate. I pulled the panel but cant see where its getting thru. obvious by the top of the tailgate where the glass is. The weatherstripping around the access panel is ruff, so, ill replace it.

My question is this, is it normal for water to get inside the tailgate in the first place???????????

THe outside seal on top of the tailgate where the glass rubs up against looks fine. The end block looking things could stand to be replaced which I will do. Im just making sure I dont over look anything. I didnt get any water thru the window or the topper itself. Its all coming from the access panel.
 
The only reason water should be getting in is if the edge rubbers around the window, or the rubber wiper on the outside of the window are allowing it in. I have never had water inside the tailgate.
 
You must log in or register to reply here.

Latest Posts

Top Bottom