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Old 12-04-2009, 04:37 PM   #1
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Default Trunk leak, cleaning, and detail...

Unbeknownst to me, my trunk was leaking. I had a thick rubber mat down along the rear portion which hid the water (and kept it from ever drying out). the carpet and jute mat were soaking wet. The car would get musty when it rained, but I thought it was just getting in and out with wet clothes, etc. I found the back edge of the trunk under the w/* was low just right of center. I removed the w/* from the center portion and could see the hseetmetal lip was in fact very low for about 6". Maybe something got set against it and dented it or something. I took a small ballpeen and beat it back into shape, and then raised the entire lip about 1/4" all along the back edge to compensate for any softness in the w/*. I used some clear silicone to seal the w/* where it presses onto the sheetmetal lip. After the silicone dried, I wiped the w/* with some wheel bearing grease and shut the lid. When I opened the lid, I could see the grease made a nice squished impression on the underedge of the trunk lid. It rained two days ago and viola! No more leak. While I had the trunk apart, I vacuumed it out real good and sprayed the entire trunk down with a generic cleaner w/bleach. It killed the musty smell, leftt he car smelling hospital clean!

The best part of this whole ordeal, I went into the parts dept here at Capital Cadillac and got the part number for a NOS trunk carpet, list $54.00. I found one at a dealer in Ohio, they had it on the locator for cost -50%. he ended up only charging me $13.31!!!! (and didn't charge anything for shipping!) I wasn;t going to put a new mat under the carpet, but the intercooler pump is mounted under the trunk pan and it is alot louder with nothing back there. I might just get some Dynamat and stick it down on the trunk pan before I install the new rug!
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Old 12-05-2009, 10:41 AM   #2
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thats good. i have a small leak somewhere because there is always lil fog on the bottom of my rear windshield(under the defrost lines) and wen i open the trunk i see condensation on the inside. I need to figure out whats goin on.
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Old 12-05-2009, 03:56 PM   #3
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Originally Posted by BonnevilleBran View Post
thats good. i have a small leak somewhere because there is always lil fog on the bottom of my rear windshield(under the defrost lines) and wen i open the trunk i see condensation on the inside. I need to figure out whats goin on.
wipe some grease on the trunk w/* all the way around the trunk. Shut the trunk. Open the trunk and look on the underside of the lid for any spot where the w/* did NOT leave a grease mark, then address that location as necessary. If it'* not he w/* leaking, look at the rear spoiler bolt holes (if equipped) and taillight bolts. There should be a rubber washer under each bolt/nut/stud. they sometimes dry-rot and leak.
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Old 12-06-2009, 01:40 AM   #4
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Originally Posted by pontiacjeff View Post
wipe some grease on the trunk w/* all the way around the trunk. Shut the trunk. Open the trunk and look on the underside of the lid for any spot where the w/* did NOT leave a grease mark, then address that location as necessary. If it'* not he w/* leaking, look at the rear spoiler bolt holes (if equipped) and taillight bolts. There should be a rubber washer under each bolt/nut/stud. they sometimes dry-rot and leak.
i didnt mean to jack the thread but thank you sir I will do this.
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Old 12-07-2009, 10:42 AM   #5
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i didnt mean to jack the thread but thank you sir I will do this.
You didn't highjack the thread, that is why I mentioned my issue, hopefully someone else can benefit from what I learned. This is the whole idea here on the forums. Then when you figure out your trunk leak, let us know about it, too.

If your car is a northern car, check for rust in the corners at the base of the back window. Also check the body seams in the water channel all around the trunk. If you see any signs of the seam sealer cracked or chunks of seam sealer missing, the stuff tends to dry-rot.
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