Author Topic: Cab Leak from wash/rain ?  (Read 850 times)

Offline Chevynut73

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Cab Leak from wash/rain ?
« on: February 13, 2024, 09:41:05 AM »
I have a water leak that comes into the cab right/passenger side when i wash her.

Ends up with wet carpet where the passenger's right foot would be. 

Pretty sure it's not coming in around the windshield. 

Any thoughts?   Have any of y'all had this problem?   

Thanks

'73 Chevy C10, 350, TH350, was a long Fleetside, now she's a short Stepper that's under construction (been in the Family since 1972).

Would rather push a CHEVY than drive a Furd

Offline Shifty

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Re: Cab Leak from wash/rain ?
« Reply #1 on: February 13, 2024, 10:03:47 AM »
If you're certain it's not the windshield, next guess would be the vents.
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

98 C2500 ext cab longbed

Offline kgross401

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Re: Cab Leak from wash/rain ?
« Reply #2 on: February 13, 2024, 12:19:01 PM »
I had the same problem on my truck and it was a bad hood latch rubber seal

Offline kgross401

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Re: Cab Leak from wash/rain ?
« Reply #3 on: February 13, 2024, 12:48:13 PM »
sorry correction I meant hood hinge seal

Online bd

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Re: Cab Leak from wash/rain ?
« Reply #4 on: February 13, 2024, 08:28:49 PM »
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Mike81K10

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Re: Cab Leak from wash/rain ?
« Reply #5 on: February 13, 2024, 09:16:39 PM »
My cab was leaking from around the cowl, area where the wiper linkage is located. It was a rusted out and was one of the first things I had to repair in my restoration!
"Tell me and I forget. Teach me and I remember. Involve me and I learn." -Benjamin Franklin

Offline Captkaos

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Re: Cab Leak from wash/rain ?
« Reply #6 on: February 14, 2024, 08:48:32 AM »
short of pulling the carpet and trim to find the source check the cowl area under the windshield this where the firewall and cowl sheetmetal meet, I have seen many rusted out here.
Best bet is to remove the interior and do a water test to find the source.

Offline Chevynut73

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Re: Cab Leak from wash/rain ?
« Reply #7 on: February 19, 2024, 05:29:57 PM »
Thank y'all and they all make good sense.

She has very little rust except surface rust and the right finder where the battery leaked acid onto it (it's been replaced now).

After a little more investigation, I think it might be the heater core leaking!  I hear those can be a pain to replace!   
'73 Chevy C10, 350, TH350, was a long Fleetside, now she's a short Stepper that's under construction (been in the Family since 1972).

Would rather push a CHEVY than drive a Furd

Offline Shifty

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Re: Cab Leak from wash/rain ?
« Reply #8 on: February 20, 2024, 08:53:52 AM »
Nowhere near as bad on today's soap bubbles.  (no personality cars)
87 V20 Standard Cab Longbed (current)

87 R30 3+3 Longbed (days of yore)

98 C2500 ext cab longbed

Offline juancano

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Re: Cab Leak from wash/rain ?
« Reply #9 on: May 01, 2024, 11:27:48 AM »
sorry correction I meant hood hinge seal

How did you fix that? Do you remove the cowl vent and add a bunch of sealant? Thanks.

Offline Mike81K10

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Re: Cab Leak from wash/rain ?
« Reply #10 on: May 01, 2024, 12:51:52 PM »
To fix my truck, I had to cut out the bad metal and weld in patch panels.
"Tell me and I forget. Teach me and I remember. Involve me and I learn." -Benjamin Franklin

Offline JohnnyPopper

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Re: Cab Leak from wash/rain ?
« Reply #11 on: May 01, 2024, 06:24:52 PM »
Nowhere near as bad on today's soap bubbles.  (no personality cars)

"Wind tunnel cars" They all look the same  ::)
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction