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TR6 Chronicles - getting the fuel to flow

Tony's picture

Tony — Wed, 02/17/2010 - 9:32pm

The TR6 restoration momentum had ground to a halt while life moved in other directions for a while. Good directions - finalizing plans for adding a third bedroom to the little house in Cool, entertaining a parade of contractor bid walks, preparing for and enjoying a family visit. But now things are picking up down in the workshop again.

TR6-Fuel-1.jpg
I like to lay the greasy stuff out in order immediatly after dis-assembly for a portrait. Aids the memory when figuring out how it all goes back together. This stuff is the support for the accelerator linkage.

TR6-Fuel-1-2.jpg
Upon rebuilding the twin carburetors and re-assembling the accelerator linkage, I couldn't help but reflect on the plight of the Toyota engineers. While they have been trying to assess the ills of the computer-assisted accelerator return, the company has lost billions and the stock market has plummeted. Peering into the TR6 I note that it also has a computer assisted accelerator pedal return. It accumulates and stores energy in direct proportion to the amount the pedal is depressed, senses immediately when the foot has been lifted, and instantly releases that energy to return the pedal to neutral. It is called a spring.

TR6-Fuel-2.jpg
Now having had fun at the Toyota engineer's expense, we move on to the fuel pump rebuild. We recall that a blasphemous Italian made replacement pump had been rejected in favor of rebuilding the original proper British pump. So here we take a look at the upper part of the pump with the valves that make the fuel flow in, then out. These are pried out using a screwdriver and some naughty words. The new ones are sitting on the towel.

TR6-Fuel-3.jpg
The lower half of the pump holds a washer through which the pump diaphragm shaft passes. As the engine turns, a lever arrangement pushes the diaphragm up and down. Since the lever pokes into the oily part of the engine, the washer acts as a seal to keep the oil out of the pump. The old one is buggered and must be replaced.

TR6-Fuel-4.jpg
A conversation with patient and kind folks at The Roadster Factory this morning revealed the mystery process for dis-assembling the oil seal. It also involves a screwdriver and naughty words.

TR6-Fuel-5.jpg
Patiently installing a spring, pump lever linkage, shaft, washers, and two tiny clips that hold it all in place. Having accomplished this task without loosing either of the tiny clips, a lunch break is called.

TR6-Fuel-6.jpg
Things are flowing now. We feel quite clever as the new valves are pressed into place using a socket and rubber mallet.

TR6-Fuel-7.jpg
Done! And it actually creates a vacuum on the inlet site and pressure on the outlet. Next comes re-installation of the cleaned and coated fuel tank.

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Sebastian's picture

Keep it coming

Sebastian — Thu, 02/18/2010 - 7:29am

Congrats on another milestone! We're going to have to come up and go for a ride when she's running again.

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