MonteCarloSS.com
MonteCarloSS.com

CELEBRATING 20 YEARS!

Previous Thread
Next Thread
Print Thread
#1072059 - 09/20/21 12:51 AM Water In Trunk  
Joined: Jul 2007
Posts: 571
Cos86SS Offline
10+ Year
Cos86SS  Offline
10+ Year
Member

Joined: Jul 2007
Posts: 571
Westfield, MA
A few weeks ago, got caught in a rain storm and noticed wet spots in the trunk a few days later. The following week, I washed the car and this time I could see water coming from the upper part of the trunk towards the rear. I went to a body shop and they recommended replacing the trunk seal. I didn't believe that this would solve the leak considering the original seal was still in excellent shape but I went and replaced it. Today I decided to pour water in small sections at the rear of the trunk. With the trunk open, I poured water around the rail of the trunk to test the new gasket. No water leak. I then poured water by the rear windshield. I started from the passenger edge and moved towards the middle. No water leak was noticed until I got close to the rear brake light. Once I got close to the rear brake light, water was pouring into the trunk.

Is this an indication that my rear windshield is leaking? Or is there anything else in that area that could cause the leak. As everyone is aware, the rear windshield were it meets the trunk lid has a cover that runs across the entire width of the trunk (not sure what they call this trim piece). I am guessing that the problem is under this trim piece. I have been suspicious of the rear windshield and I even went to a windshield shop but they told me that they do not work on older cars since they cannot get replacement windshields if they break. I will find another place if that's what's causing the leak.

Thanks for any info you can provide.
Cos


86 Monte Carlo SS W/T-Tops 'Original Owner'
355 CI, Hooker Super Comp Headers, True Dual Exhaust, Comp Cam Roller Cam (XR276HR-10), Q-Jet Carb 795CFM. 200-4R Transmission. 2" Lowered Suspension.
#1072060 - 09/20/21 01:01 AM Re: Water In Trunk [Re: Cos86SS]  
Joined: Dec 1999
Posts: 11,898
86ttop Offline
20+ Year
86ttop  Offline
20+ Year
Member

Joined: Dec 1999
Posts: 11,898
Brooksville, Fl
Cos, remove that piece of filler panel and see if something is rusted thru and good luck!!

Last edited by 86ttop; 09/20/21 01:02 AM.

Leo Paugh
It's not an attitude, it's just the way I am.
POW*MIA
You are not forgotten
If things improve with age, I must be approaching magnificent. thumbs
#1072061 - 09/20/21 01:48 AM Re: Water In Trunk [Re: Cos86SS]  
Joined: Jul 2007
Posts: 571
Cos86SS Offline
10+ Year
Cos86SS  Offline
10+ Year
Member

Joined: Jul 2007
Posts: 571
Westfield, MA
Thanks Leo.


86 Monte Carlo SS W/T-Tops 'Original Owner'
355 CI, Hooker Super Comp Headers, True Dual Exhaust, Comp Cam Roller Cam (XR276HR-10), Q-Jet Carb 795CFM. 200-4R Transmission. 2" Lowered Suspension.
#1072068 - 09/21/21 01:06 AM Re: Water In Trunk [Re: Cos86SS]  
Joined: Dec 1999
Posts: 11,898
86ttop Offline
20+ Year
86ttop  Offline
20+ Year
Member

Joined: Dec 1999
Posts: 11,898
Brooksville, Fl
thumbs


Leo Paugh
It's not an attitude, it's just the way I am.
POW*MIA
You are not forgotten
If things improve with age, I must be approaching magnificent. thumbs
#1072102 - 09/27/21 12:38 AM Re: Water In Trunk [Re: 86ttop]  
Joined: Jul 2007
Posts: 571
Cos86SS Offline
10+ Year
Cos86SS  Offline
10+ Year
Member

Joined: Jul 2007
Posts: 571
Westfield, MA
I removed the trunk filler piece and found no rust at all. What I did notice is 2 drilled holes about 8 inches apart towards the middle of the rear window where I noticed the water leaking into the trunk. Not sure where the holes came from but I did have a phone installed in the car in the late 80s. The main unit for the cell phone was installed in the trunk (perhaps in that same general area as the holes). What puzzles me is that I removed that unit over 10 years ago and this is the first time I noticed water in the trunk. The trunk and the area behind the rear window is rust free. I do have several spots behind the rear window where the paint has scrapped off but will sand that down and repaint those areas. As a quick fix, I shoved a rubber seal inside the holes to keep water from getting in the trunk. I thought about going to a body shop to weld them closed but there must be other options. Does anyone have any thoughts on how to close up those holes without having to spot weld? Thanks.


86 Monte Carlo SS W/T-Tops 'Original Owner'
355 CI, Hooker Super Comp Headers, True Dual Exhaust, Comp Cam Roller Cam (XR276HR-10), Q-Jet Carb 795CFM. 200-4R Transmission. 2" Lowered Suspension.
#1072105 - 09/27/21 02:46 AM Re: Water In Trunk [Re: Cos86SS]  
Joined: Jan 2000
Posts: 5,422
mmc427ss Offline
20+ Year
mmc427ss  Offline
20+ Year
Member

Joined: Jan 2000
Posts: 5,422
Pottstown, Pa
Flex Seal, just kidding.

If the holes are smaller, less that a 1/4", and they are hidden from view you could RTV the holes. The area cleaned thoroughly on both sides for adhesion would last a long time. Or you could use RTV with a rubber plug.
Welding the holes could be done but finishing the area becomes a lot of work as paint will be gone. If MIGed welding splatter must also be dealt with.
Bob

#1072106 - 09/27/21 01:30 PM Re: Water In Trunk [Re: Cos86SS]  
Joined: Feb 2016
Posts: 79
zelm86ss Offline
Member
zelm86ss  Offline
Member

Joined: Feb 2016
Posts: 79
Bremen,In
Kind of like what Bob said above but use a plastic push pin with a flat top (like the push pins for the door panels,but with just a flat top or cut half the door panel push pin top off) to fill the hole and then use body seam sealer under and on top of the push pin to seal it. Same goes if you're going to use rtv. Depending on how large the hole is,there are different size push pins like 1/4" or 3/8".

#1072107 - 09/27/21 02:11 PM Re: Water In Trunk [Re: Cos86SS]  
Joined: Feb 2016
Posts: 79
zelm86ss Offline
Member
zelm86ss  Offline
Member

Joined: Feb 2016
Posts: 79
Bremen,In
Or a better way would be to use a panel bond glue. Cut a metal patch and rough up the metal on the patch and grind the metal on the body where the patch would be ( down to the metal). Use a panel bond glue such as 3m 08115 and use body shop vise grips such as these https://www.amazon.com/Locking-C-Clamp-Perfect-Woodworking-Welding/dp/B07TRKMV1Z/ref=sr_1_5?crid=1LELEYXQ4KBOQ&dchild=1&keywords=vise+grip+body+clamp&qid=1632751402&sprefix=vise+grip+body%2Caps%2C163&sr=8-5 .Clamp together overnight and you'll never have a problem. You can use some of the panel bond over the top as well to seal the patch. Also if you don't have a gun to fit the two part epoxy tube,just squeeze a 1/4" or so out of both sides and mix together then apply. The 3m stuff has a pretty good working time,just have everything ready to go before you mix it.

Last edited by zelm86ss; 09/27/21 02:25 PM.
#1072108 - 09/27/21 03:42 PM Re: Water In Trunk [Re: Cos86SS]  
Joined: Jan 2000
Posts: 5,422
mmc427ss Offline
20+ Year
mmc427ss  Offline
20+ Year
Member

Joined: Jan 2000
Posts: 5,422
Pottstown, Pa
I was going to say body seam sealer but the price of a tube anymore for a couple dabs is ridiculous.
Bob

#1072110 - 09/28/21 12:58 AM Re: Water In Trunk [Re: Cos86SS]  
Joined: Jul 2007
Posts: 571
Cos86SS Offline
10+ Year
Cos86SS  Offline
10+ Year
Member

Joined: Jul 2007
Posts: 571
Westfield, MA
Thanks everyone. Great ideas. Welding is off the table. I like the plug approach. Not sure if everyone is aware that POR-15 makes a Filler-Seam sealer. Here's a link to Amazon.

https://www.amazon.com/POR-15-49013...p;pd_rd_wg=xg6R9&ref_=pd_gw_crs_wish

The holes in the trunk are probably 1/4" but definitely no larger than this. They are very small but are also located near the rear windshield. One of of the holes is approx. 1/4" from the rear window while the other is around 1/2" and very close to the center clip that holds the filler panel. So I don't have a lot of room to sand down the holes and have to be very careful not to hit the rear windshield. Seems like the POR-15 seam filler may fill the hole without a push pin but will go to one of the local auto store or hardware store and see if I can find a small push pin. If I order from Amazon I have to buy 50 of them.

Has anyone used the UV Fiber Patch such as the one here on Amazon: https://www.amazon.com/RapidFix-UV-...air+patch&qid=1632789714&sr=8-37

This may work as well and can be cut to size and can do the job from the top side of the trunk.

One more note: I am not able to see the holes from inside the trunk. I believe they are located under a panel that runs across the back of the trunk by the hinges. That is where I noticed the water coming into the trunk. Therefore, I may only be able to plug the holes from the top side and may not be able to place seam sealer on the bottom side.


86 Monte Carlo SS W/T-Tops 'Original Owner'
355 CI, Hooker Super Comp Headers, True Dual Exhaust, Comp Cam Roller Cam (XR276HR-10), Q-Jet Carb 795CFM. 200-4R Transmission. 2" Lowered Suspension.
#1072113 - 09/28/21 12:18 PM Re: Water In Trunk [Re: Cos86SS]  
Joined: Feb 2016
Posts: 79
zelm86ss Offline
Member
zelm86ss  Offline
Member

Joined: Feb 2016
Posts: 79
Bremen,In
The sealant really doesn't have to go on the bottom side of the hole if you can't get to it. Just some sealant under the push pin (around the hole) and over the top and you'll be good. You may have to trim some of the top of the push pin off so it's flat depending on where the hole is.


Random Images
523/thumbs/DSC_0617.jpg
by Z65_Paul
500/thumbs/1014081346.jpg
by mightymonte10
500/thumbs/The_Kids15.jpg
by JAWSS
500/thumbs/Photo0189.jpg
by benen
500/thumbs/downsized_0407111600a.jpg
by slick-licks85
Help MonteCarloSS.com


Recent Contributors
86BlackSuperSport
dns87ss
Authorized Vendors
Tell them you saw it
on MonteCarloSS.com!


CustomMonteSSParts.com
Dixie Monte Carlo Depot
GSI Interiors
HRpartsNstuff
Mikes Montes
Savitske Classic & Custom
Powered by UBB.threads™ PHP Forum Software 7.6.0