And this wonderful picture by Jason Edge(thank you) shows the drain rail that dumps water into the rocker panelin front of the right side rear wheel.Its seen here above the wheel house. Question: how to reestablish the drain path for the water after the rocker was patched?

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Comment by Jeff Kinzler on June 2, 2015 at 12:30am


At 20 bucks a can, I would tend to use it sparingly!

You could probably have your whole body dipped in a tank for that much!     LOL

Comment by Gene McIlroy on May 31, 2015 at 1:45am

Chris's photos are the same as my convertible.  I didn't know about the rubber flap covers though mine are open like his with the rubber off.  Glad to know that there is something supposed to be there.  Jeff's Eastwood product looks like the best way to go for protection.  Originally all the rocker panel metal was made with galvanized sheet metal for rust protection or they would be much worse that they are now.  I've cut apart a 63 4 door and all the rocker panels were pretty solid for the age the rest of the floorboards etc. were all rusted out on that old car.  Several pieces of it were sent to the Netherlands to a member for his car.

Comment by Christopher Codd on May 30, 2015 at 11:44pm

I need about thirty cans of that stuff. I didn't know that stuff existed. Nice find. 

Comment by Jeff Kinzler on May 30, 2015 at 7:57pm

Comment by Jeff Kinzler on May 30, 2015 at 7:54pm

They also have some applicators for reaching inside body cavities and frame holes with this type of material.

Comment by Jeff Kinzler on May 30, 2015 at 7:53pm

I'm thinking the  best approach would be to hose it out,  blow it out and then, after its good and dry drip some type of rust proofing coating-maybe the waxy oily glop from Eastwood- from the top down until it runs out of the holes, and make sure the drain holes are not blocked.

Comment by Christopher Codd on May 30, 2015 at 5:54pm

That's interesting information you found. After pulling that plug, I noticed all the dirt and debris that's stacked up in there over time. It's definitely not the most efficient system. Also, for the convertibles, I noticed that there is another drain from the top boot area which also collects tons of leaves and dirt over time. 

Comment by Jeff Kinzler on May 30, 2015 at 4:35pm


Thanks for posting the pictures.

I think that these elements may include what was called the "flush and dry" rocker panel system that was used as far back as the '63 Chevy according to ad copy. The idea was to take water from the cowl area and direct it through the rocker panels as well as air flow to flush out any moisture and dirt.

However, after getting clogged with leaves and debris, these systems may have become moisture traps leading to corrosion. 

The convertible drain may have just been designed to add its water into the same system to exit through the flap valve:

Here is a diagram of the flush and dry system in a Camaro body:

Googling "flush and dry rocker panel" led to a bunch of interesting discussions by folks grappling with similar issues.

Comment by Christopher Codd on May 30, 2015 at 3:17pm

Alright, so I was finally able to get under the car and take a look around. Here are some pictures for you. The rubber plug for the rocker panel was still on but extremely brittle and broke when I touched it. 

That last picture is inside the wheel well next to where the skirt mounts. None of the holes look low enough to drain anything. 

Comment by Christopher Codd on May 30, 2015 at 12:54pm
I'm over at the barn right now but the car is not easy to access while it's in there. I'll be posting some pictures in a few minutes.


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