floorboard repair, part III

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JHZR2

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Well, things are coming along.

I could buy galvanized 26GA from HD. Looking at what would need to be cut to fresh to weld, I decided against cutting out that much floorboard, and using a rivet job instead.

Ive also bought the so-called simpson strong tie connection straps, which come at different angles and designs. They are 20 Ga and heavier.

Ive dremeled and ground rust in all directions to where I find shiny metal (per section II). Then, Ive taken Eastwood PRE paint prep, cleaned everything, and coated everything that had remaining surface rust with Eastwood Rust Converter. This penetrates and neutralizes the rust.

I cannot paint over all the converted surfaces until 48 hours - the cure time for the converter. SO Ive gone to shapng the metal.

Because of features in the floorboard and the vertical metal where the floor meets the side of the car, I decided to go with multiple pieces of sheetmetal.

The rust is at the point where the rocker meets the floorboard. So, there is an open space in the rocker, which I need to enclose, then attach to the vertical inner part of the rocker, and the horizontal part of the floorboard.

Ive used the galvanized to enclose the rust holes in the "vertical part", which will form the rocker. I was worried to form a liece that went all the way to the floorboard, as it would create a spot where water in the rocker could seep to a gap or to the floorboard. Instead, I only replaced the rusty metal on the vertical surface. Ultimately Ill take POR-15 epoxy patch and seat the galvanized sheetmetal into that, which will bond it to the lower surface, to enclose the rocker area completely. Between that and fiberous asphalt inside the rocker, this piece should be well-protected.

I then took the simpson strong-tie galvanized straps and formed them to be the true support between the good metal on the inner rocker and the good metal of the floorboard.

I used a few that are 18 Ga galvanized, and two in the main "hole" area which are 10 Ga or heavier. They were pre-drilled, so I am able to form them to the shape of the angle for the floorboard/rocker connection, and use the holes in them to be the guides for the holes I drill through the metal in the car.

A picture is attached:
DSC_5214c.jpg


The rust converter is curing and transforming/sealing the rust. Ill next prime and enclose everything with Eastwood rust encapsulator to seal it all up.

Ive drilled all the holes for the rivets, and after everything is painted and dry, then Ill coat with tar, other rust-preventative coatings, epoxy what needs to be epoxied in place, and then rivet everything tight.

Once all riveted, I plan to repaint the whole assembly from the top, after applying brushable seam sealer.

I also plan to dip my rivets that will go into the rocker or to the weather first in eastwood rust encapsulator (which is a good primer for steel), then coat them in eastwood HD anti-rust, which is a self-healing waxy coating similar to Amsoil HD MP.

Ill post more pics when Im able...

Any thoughts/comments???

Thanks!

Then, I took
 
Seconded on the stainless-steel rivets. Common rivets are aluminum, and will galvanically corrode your handiwork.
 
I chose steel rivets because of the issues with aluminum. I figured that steel may be slightly stronger than SS too.

I figured that coating them would prevent rust.

Certainly can go SS, if it is indeed the better choice over plain steel... What size is preferred, 1/8, 3/16?

Thanks!
 
Nice job. A labor of love, I'm sure.

Did you consider finding a junk yard car that you could have cut the piece out of and had someone weld in for you?

How much are all these rust chemicals costing compared to having new/used sheet metal welded in?

Just curious, because I have done projects like this. Fiberglass works well, but not for all cases.

Good Luck and thanks for sharing.
 
I have all the chemicals already, and overall that stuff has cost me around $100, so less goes to waste by using it...

I bought a dremel, but ive wanted one for a while anyway...

There is a serious time commitment to going to a junkyard, finding and cutting metal, etc., let alone the same prep required (but on a grander scale due to more needing to be cut, etc.).

Ive done welding in of patches in rusty cars before. To do it right takes a large time commitment and a fair amount of cost. ive definitely spent less, even with buying a dremel...
 
Originally Posted By: sciphi
Seconded on the stainless-steel rivets. Common rivets are aluminum, and will galvanically corrode your handiwork.


I found that HD, lowes, etc. do not carry SS rivets (they barely carry steel). I also found that the rivet guns they sell, made by Arrow, are not specced for pulling SS rivets.

I went to Amazon and bought a Stanley rivet tool, which IS specified to pull SS rivets. I then went to McMaster Carr, and bought high-strength, SS, "Sealing" rivets. While Ill still coat them, etc., I figure sealing ones are probably better overall...
 
How's the dremel? I figure a $20 harbor freight angle grinder with cutting/ grinding wheels would go faster, but not fit the tight spaces if there are any.
 
I think so... Ill have the wife help me if need be, as we can probably rig up something. We can always make a jig with some pipes and really extend our leverage.

The tool is designed and specced for steel and stainless up to 3/16.
 
when I was doing similar repairs, I used a cheapo 4 1/2 " grinder. If I needed to do some serious de-scaling, I took off the guard and used a 6" knotted wire wheel. Heavy gloves, goggles and extreme caution were used. That was one scary tool. Dont be surprised that you find more rot than you suspected going in. Keep a weather eye out for lines and wiring harnesses.
 
Originally Posted By: andyd
when I was doing similar repairs, I used a cheapo 4 1/2 " grinder. If I needed to do some serious de-scaling, I took off the guard and used a 6" knotted wire wheel. Heavy gloves, goggles and extreme caution were used. That was one scary tool. Dont be surprised that you find more rot than you suspected going in. Keep a weather eye out for lines and wiring harnesses.


I agree. When I worked on my Bronco project, I dealt with a ton of floorboard rust. A knotted cup-brush on the 4.5" grinder was the most effective tool I found.
 
Ive gone through to clean, shiny metal. Not that much rust, though the hole has a decent size. The rust point is well known and due to water in the rockers.
 
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