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Topic: Leak in wiper tub

in Forum: C3 Body

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Leak in wiper tub (1/6)
6/30/13 4:46pm

BigShoes16
Former Member
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Worcester, MA - USA

Vette(s):
75 L-82 Coupe 4-spd

Joined: 2/25/2013
Posts: 52

I'm calling upon the collective knowledge once again. There's a leak in my wiper tub, directly over my brake pedal and I hate wet feet!.

You'd think that the half-ton of bondo that Bubba smeared in the tub would have stopped the leak but I'm guessing the body flex eventually cracked it open.

I ground and sanded out as much bondo as I could to reveal what I think is the problem.

What you're looking at in the picture below is a view from in front of the windshield on the driver's side, looking down toward the front of the car. The red circle is around the lower left bolt holding the brake booster panel to the back of the firewall. The green outline at the bottom is where the wiper arm pivot bolts to the car under the windshield. Outlined in the yellow box is the crack.

How do I best repair this so that is does not open up again?

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Re: Leak in wiper tub (2/6)
6/30/13 7:14pm

Adams' Apple

Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

Use what the factory did...roofing tar. Thumbs Up

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Joel Adams
C3VR Lifetime Member #56
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(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Re: Leak in wiper tub (3/6)
6/30/13 10:50pm

Sarge81

Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2379

I had the similar problem on the '81. They used seam sealer on those later years I guess. The sealer was hard and brittle.

So I removed the wiper arms, transmission, wiper arm towers. Then chiseled out all the old seam sealer in the wiper tray area and went down along the sides of the cowl that I could reach. Then I picked up some good professional grade seam sealer from the local auto body supply store.

Then placed tape on both sides of the seams, then laid the seam sealer along the seam and in between the tape. Once the sealer was starting to set up I peeled up the tape leaving a nice clean line. Then once it was cured I took some "paintable" undercoating and did a couple light coats. Once that dried I took some satin black paint and dusted in a few coats.

Haven't had a leak in years, and it still looks good in that area.

Good luck!

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GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

3.54 Dana 44

'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975

Click here to see more pics of my Vette on CarDomain.

Lifetime Member #26

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Re: Leak in wiper tub (4/6)
7/1/13 7:24am

BigShoes16
Former Member
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Worcester, MA - USA

Vette(s):
75 L-82 Coupe 4-spd

Joined: 2/25/2013
Posts: 52

Sarge - thanks for the info. That sounds like the plan for me.

Off to the parts store... again.

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Re: Leak in wiper tub (5/6)
7/1/13 4:37pm

danascar
Standard Member
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Germansville, PA - USA

Vette(s):
1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats. . 1999 C5 Convertible, 6 speed, Atomic orange, Oak interior.

Joined: 1/28/2010
Posts: 858

Spray liquid rubber will do the trick too...remember, it will make a boat float with a screen door for a floor Big smile

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DanT

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Re: Leak in wiper tub (6/6)
7/24/13 5:46am

nextdoor76
Former Member
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Kimberling City, MO - USA

Vette(s):
1976 Stingray

Joined: 12/2/2012
Posts: 49

My sealer had hardened and was easy to power wash out/ scrape. It was not leaking but soon would have. I sprayed the area with the flex seal as seen on TV. It is available in black and white...black for me. Sealed and even bubbled, in heavy spray areas, much like the org. and looks really close to my org. sealer.

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