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Old 01-17-2021, 01:47 PM   #1
67 K10
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Water leak

Hey guys, I have been battling a water leak under my dash on my 67 k10. Had the windshield out new gasket and glass , had it in the glass shop twice. I can't find where it is getting in. Just wondering if anyone has had the same problem and has any suggestions. Thanks!
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Old 01-17-2021, 02:27 PM   #2
ThreeQuarter
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Re: Water leak

Check along the body seam inside the cowl, or it could even start in your drip rail above the windshield, then channel down the A-pillar.
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Old 01-17-2021, 02:31 PM   #3
Andy4639
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Thumbs up Re: Water leak

Per the GM shop manual you should put sealer at each top corner and extend it out at least 6" so it gets that seem in the top. May not fix it but it's a start. The dash if you look has holes in the area around the bottom of the glass. Water comes in at the top and comes down the windshield sides then out at the curve at the bottom and drips through the holes in the dash.
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Old 01-17-2021, 03:44 PM   #4
cj847
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Re: Water leak

is it leaking only on one side?
Are you sure there is no anti freeze in it (heater core leak)?
There is a seam under the cowl about 10" from the edge of the truck on both sides. They do rust there a lot esp if it was ever clogged up.
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Old 01-18-2021, 03:22 PM   #5
SIXTY9
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Re: Water leak

Check the wiper motor seal. I chased a leak and found mine bad.
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Old 01-18-2021, 06:49 PM   #6
HO455
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Re: Water leak

Quote:
Originally Posted by 67 K10 View Post
Hey guys, I have been battling a water leak under my dash on my 67 k10. Had the windshield out new gasket and glass , had it in the glass shop twice. I can't find where it is getting in. Just wondering if anyone has had the same problem and has any suggestions. Thanks!
Can you be more specific as to where? There's at least 5 feet of under dash!
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Old 01-18-2021, 09:40 PM   #7
Grumpy old man
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Re: Water leak

Use CRL 1716 flow grade sealant to cure water leaks from the gasket /windshield

https://www.crlaurence.com/crlapps/s...ModelID=19965#

with the gun dispenser CRL 181AG

https://www.crlaurence.com/crlapps/s...&ModelID=19352
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