My 1929 Plymouth Model U

Chet's Old Plymouths

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Running Board Redo February 3 - March 15, 2008

February 3, 2008

I started the refurbishment of my running boards. I am using a good 3/4 inch exterior finished plywood. Also as Trim..,  aluminum cap moldings.


Parts List

  • 23/32x2x4 Sand Pine Plywood..................$ 16.53

  • 2 Aluminum Caps........................................$ 16.14

  • 8 T-Nuts with prongs, 5/16 - 18x3.............$   8.328

  •  Hex Bolts 5/16 x 18 x 1" ...........................$  2.08

  • 1/8" Ribbed Rubber material....................$ 55.00

Total Cost to date: $ 98.07

Step 1

  • I removed the old running boards and took careful measurements.

  • The measurements are typical from the driver's side to the passenger side. 

  • If you flip the diagram above it would be typical to the passenger side board.  The view to the left is the passenger side.

  • At this point the overall thickness of 7/8 of an inch seems correct..., of course if in the final assembly additional thickness is needed I can always glue on an additional 1/8 or 1/4 inch ply to the bottom of the running board to ensure a clean fit.  If that is the case I will add the appropriate painted aluminum cap to match.

Step 2

  • I cut the boards and inserted Pronged T nuts so the board can be bolted into place from under the car.



Step 3

  • I drilled the surface with a 1 inch flat wood drill to ensure that the T nuts were flat with the finished surface.
  • When I glue on the rubber I will cover the T Nuts with masking tap so that the glue doesn't get down into the nuts and push up on the rubber surface when I screw the boards into place.

The work continues...     02/24/2008

Step 4

  • I decided to put aluminum trim around the whole running board. 

  • I needed to route out 1/8" to allow for the rubber top.

Step 5

  • I covered the pronged T nuts with tape to keep the contact cement from getting into the threads.

  • I applied contact cement to the wood surface and to the rubber mat.

  • Then I allowed the glue to dry and used a piece of cardboard between the wood surface and the rubber mat .  This way I could position the rubber exactly where I wanted it.

  • I slowly pulled the cardboard out and allowed the rubber to bond with the wood.

Step 6

  • Now the hard part.  Fitting the trim.  Because of the irregular angles a miter box couldn't be used.

  • Originally I cut the wood boards to allow 1/8" on each side for over lapping the rubber.  Since I used the 1/16" channels I needed to shim the aluminum end pieces out with 1/16" shim stock.

  • I must say this was the hardest part of the project.  Getting the angles correct.  The overall length was a perfect at 43 & 3/4 inch

Well I think the finished product came out well and you can't beat the price.

Saturday March 15, 2008

I installed my homemade running boards and I think they look A-OK.  They should serve me well until I can find some original parts at a reasonable price.