I've got water infiltration :-(

[Carnalsupply]

Whenever it rains or I wash my '70 LT-1, I get water infiltrating through the cowl area and soaking the floor below the pedals.
Can anybody give me the skinny on a good place to start, as well a possible solutions?
Thanks, and Happy New Year!!!!!!

 

[silver 80]

clogged drains? allot of leaves.
try and remove the pannel on the inside by your feet, and get a small vaccum attachement in there . or squeeze your hand or your childs hand in there and remove the 30years worth of gunk.
there is also a book out about water leaks and how to fix the problem.
tom

 

[Eric]

The 30 years worth of clogged gunk probably is the culprit but here's another place to look if that doesn't solve the problem, though it's a royal PITA. The water may actually be coming through one of the holes in the firewall where the seals/sealant may have rotted or even been removed for some sort of maintenance over the years. I'll see if I have a diagram of the firewall at home and post it here.

Good luck!

 

[Carnalsupply]

It sounds like I ought to pull off the cowl grill and thoroughly "chase" all the various drains, etc., and check the rubber grommets and seals. This is gonna be a fun little task.
Thanks for the info guys, I appreciate it.

 

[Tom Bryant]

Leaks

Another area that I have had a problem with is the wiper transmission mounting plates. The sealant dries up and will let water leak in. I have had to take them loose and reseal them on 2 cars. Strip caulk works well.

Tom

 

[Carnalsupply]

Ouch! I can only hope mine isn't leaking in that area, but I'll certainly check it out!
Thanks