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MARTS-PL310 61 Datsun Bluebird Sedan


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Building the 1961 Datsun 310 Bluebird - Replacing the right rear seat pan support structure, step and wheel well  lip.

First, the Bluebird rear seat pan structure as it was.
883112962_61BluebirdRightRearSeatPanStep-1(22).jpg.b9155f7769ad9db3e09e641fa66b61eb.jpg

1516427896_61BluebirdRightRearSeatPanStep-1.jpg.5aaaafffd5436a8e661b2d3a8abfc671.jpg

And from the wheel well perspective.
1724992246_61BluebirdRightRearSeatPanStep-1(23).jpg.bfd8b030f2791dff3c579f739e0bb4f9.jpg

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So I started by cutting some rusty metal out.
1470724125_61BluebirdRightRearSeatPanStep-1(1).jpg.da1c48b0e61854074898d369bd1851cb.jpg

966809663_61BluebirdRightRearSeatPanStep-1(2).jpg.c2cdff4035ddb45e8f2a7dd6af29522a.jpg

Then I worked this piece to savage the good 3/4 portion with the four beads and replace the rot.
1176208710_61BluebirdRightRearSeatPanStep-1(3).jpg.090d0c829659c97dcb6af190a40d158f.jpg

Fitting the old and new together.
920780115_61BluebirdRightRearSeatPanStep-1(4).jpg.69e39dda205d9db5b6c23d128dca05b4.jpg
 

 

Made some tack welds.
1107943897_61BluebirdRightRearSeatPanStep-1(5).jpg.b5ff1456271593268fcc879bd6ec11b8.jpg

Finished and cleaned up the welds and built the vertical side support.
The little side floor was built a couple of years ago.
Screwed the pieces together.

417073225_61BluebirdRightRearSeatPanStep-1(8).jpg.e5ab5393e732f71c975442dd17a8f17f.jpg

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Checked fit with the car. Fitted good! Welded on later. I moved on to fix the rot on the wheel well lower lip.
1131311758_61BluebirdRightRearSeatPanStep-1(6).jpg.3ef915e4d81f60ff74d0e3357a9daa32.jpg

A bunch of little rot pieces cut out and repairs can begin to the wheel well just behind the step plate vertical flange.
Mostly self-explanatory. Three more or less flat pieces of rot cut out and new metal welded in. Took some time to do though.
.1772174839_61BluebirdRightRearSeatPanStep-1(9).jpg.85c8baa01246a267c65c9e5fba459032.jpg

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And in the next post: The new inner sill and all six brackets that go with it.

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Building the 1961 Datsun 310 Bluebird - RHS floorpan fabrication completion.

More progress on the Bluebird RHS floorpan. I've done a lot of work.

Started by fully welding up the tacked up butt weld joints shown previously. Used mostly MIG process (tack, tack, tack and grind excess).1807068019_61BluebirdRightSideFloorPan-3.jpeg.449ae12e1e503691e16699de76fcdeb5.jpeg

Then used a large piece of cardboard to rough out the edge trim contour. Got it relatively close and then rolled a large washer with a marker on the ID to get the contour line against the tunnel.

1934343814_61BluebirdRightSideFloorPan-8.jpeg.52e095b280e8b74f597b6eaba80009b5.jpeg

 

Final trimmed shape of the cardboard.

463597483_61BluebirdRightSideFloorPan-10.jpeg.3322087475c2bf0592b936641fe073c9.jpeg

Set the it on the pan and trimmed it.
2020955562_61BluebirdRightSideFloorPan-11.jpeg.a88e37253d5f637fa64e31e1ea3e9ae8.jpeg

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2050967551_61BluebirdRightSideFloorPan-13.jpeg.a5e98e3c21f056a696a0500b853480fd.jpeg

Left a uniform amount of excess to transition with a fillet against the tunnel. 

740148228_61BluebirdRightSideFloorPan-18.jpeg.c43ff12e4a2932ff20f25b55b361bd07.jpeg

Blended the edge end of corrugations flat by making a couple cuts on each, pounding flat and welding.
Then made a 90 degree flange to mate with the inner sill plate.
The beat and rolled the tunnel edge into a fillet with hammer and dolly.
Then did a somewhat successful first rough trial fit.
Looks ok from a distance but up close it needs more finesse.

1486687648_61BluebirdRightSideFloorPan-20.jpeg.dcc1305e2e0486b6b1ab163ec8d65b9b.jpeg

1855446235_61BluebirdRightSideFloorPan-22.jpeg.e57490e25de234b82f7f718b0dda5837.jpeg

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Formed some stiffening bumps, same as factory floor, with homemade tools of plywood (male/female blocks), chuck of plastic pipe, deep socket and a big hammer. The forming process pulled in some adjacent metal on the ramps which were easily panel beaten back to shape.

321766787_61BluebirdRightSideFloorPan-40.jpeg.14cda484af704895ec4f666859a35050.jpeg

1753475974_61BluebirdRightSideFloorPan-50.jpeg.455a858af42b3c05926ed77dd9e71818.jpeg

Cleaned up the hat section underside support that was salvaged and temporarily attached it.
First with some Clecos, then later on used Teks.
Wrong application for regular low tension Clecos due to the undulating contour and minor mismatch.
Pounded in some depressions for the two body mount bolt locations.
Also attached the stub at the extreme forward end to mate with the toe board.

1450181270_61BluebirdRightSideFloorPan-60.jpeg.c2e0fbb82bb25530cb06a8b307764b8b.jpeg

Running out of the allotted pic upload limit. More soon with repairs to the salvaged seat support bracket and other parts/stuff.

Discussion:

https://oldschool.co.nz/index.php?/topic/60267-marts-pl310-61-datsun-bluebird-sedan/

Build:
https://oldschool.co.nz/index.php?/topic/60264-marts-pl310-61-datsun-bluebird-sedan/

 

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(continued from previous post today)
Building the 1961 Datsun 310 Bluebird - RHS floorpan fabrication
  completed.

Started work on this rusty old RHS seat support bracket.

1764160242_61BluebirdRightFloorPan-26a.jpeg.e2c1819b4dfb14c067c2cc4c4034f932.jpeg

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202197753_61BluebirdRightSideFloorPan-61.jpeg.f97732206d16255608e7bb225361428a.jpeg

806437195_61BluebirdRightSideFloorPan-63.jpeg.da1667935e210dbea5239d040c6303a6.jpeg

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Salvage it with repair?
Replace it?
Make a new one?

Chose to cut the rusty half off and salvage it.

41391573_61BluebirdRightSideFloorPan-74.jpeg.e3fec1d3b005c11ea9fc7a3ea8abaa3e.jpeg

Made a sketch and got to work on the base using 2 mil thick steel. Easy to weld with a TIG compared to the thin stuff at least!

1969048008_61BluebirdRightSideFloorPan-75.jpeg.b2bc710e02e156ded8103ba35dd482d7.jpeg

The rest follows naturally and was a fun mini project.

151823845_61BluebirdRightSideFloorPan-79.jpeg.1bcf958b3e572134d5d98bc2ded156b6.jpeg

1714654203_61BluebirdRightSideFloorPan-85.jpeg.baffb91a989650c9bca35ca23c3f1dce.jpeg

Tacked the new base half on with a MIG, filled in with small pieces on the ends and then TIG welded it the rest of the way.

253886308_61BluebirdRightSideFloorPan-90.jpeg.99a4fc404205fc1176fa54d085d4b735.jpeg

After trim of excess and smoothing the edges a bit.

I had an existing hole on the top salvaged half rail that was not original and plugged it.

956534309_61BluebirdRightSideFloorPan-92.jpeg.2b4744cf333c126a5a7f2d9ee2dcfb8b.jpeg

189597519_61BluebirdRightSideFloorPan-94.jpeg.33690ddac94c2cfacc3d7f0e029352b3.jpeg

Turned out ok with some of the weld in the fillet left unground.

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976195292_61BluebirdRightSideFloorPan-99.jpeg.333eb9b560427ef7f6fdd9f40f178bce.jpeg

The seat bracket In its future location.
The Clecos in the background btw were just an experiment and I used Teks instead for temp assembly as noted in prior post.

2143708799_61BluebirdRightSideFloorPan-106.jpeg.9561759c031c7507024c552b5c817e71.jpeg

468605307_61BluebirdRightSideFloorPan-107.jpeg.15cc44a8a8f4be7f64c01e7048356bb3.jpeg

I'll make third post tonight and wrap it up.

Discussion:

https://oldschool.co.nz/index.php?/topic/60267-marts-pl310-61-datsun-bluebird-sedan/

Build:
https://oldschool.co.nz/index.php?/topic/60264-marts-pl310-61-datsun-bluebird-sedan/

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