Sam Buchanan

We discussed this last week: https://p15-d24.com/topic/60113-brake-light-switch/ I really like the switch installation on my P15.

This hose on my P15 is braided 50psi, made in Amurrica, I've used this hose a bunch for a long time and never had problems with it. Is this the one you prefer? This from the Gates website: This fuel hose is recommended as the premium choice for clamped hose applications on all fuel systems, including fuel injection systems. Not designed to replace coupled hose assemblies on fuel injected engines. Approved for use with leaded and unleaded gasoline, diesel fuel and gasoline blends of ethanol, methanol and ethers (up to maximum concentrations allowed by the EPA) 100% methanol or ethanol and B100 biodiesel, up to 135OC. Key Features and Benefits: • Outstanding fluoroelastomer liner resists permeation and alcohol • Outstanding oil resistant tube combats heat. • Polyester braid reinforcement increases strength • Oil, heat, ozone and abrasion resistant cover • Meets requirements of SAE 30R9 • Superior for service life over standard fuel hose

Sounds similar to what I run in the P15, electric pump, mechanical pump block-off plate, and single metal filter at the tank. Since I replaced the tank and all lines I don't see a need for a filter at the carb. The firewall-mounted fuel line keeps it far away from manifold heat, never had any vapor lock issues.

Yep, it doesn't matter what cap you use, even a 30lb cap wouldn't make any difference since the system will never develop pressure with the open vent. A cork would work just as well. ? Below is where I keep the coolant level in my P15, you can also see the non-vented cap. The car runs no hotter than 185 in our horrid summers and I've never seen it burp. Maybe I'm lucky to have a radiator that seems to be healthy even though the top cap really needs paint or polish (!).

If you ever have vapor lock issues that filter that close to the exhaust manifold would be a prime suspect. I would also prefer not to have any fuel line connections/interruptions that close to the manifold. If any line failure occurs while the engine is running the fuel pump will be spraying the manifold with fuel.......

Me thinks this is a solution in search of a problem.......... These old cars ran for decades without a coolant recovery system.

Plastic filter downstream from the fuel pump in engine compartment on same side as the exhaust manifold? Why roll the dice? Use a metal filter.

https://vansauto.com/product/gas-tank-49-52/ If you're going to the effort to replace the tank, go ahead and replace the sender and all fuel lines. You'll never have another fuel delivery problem and that will eliminate a huge part of the drivability problems with our old cars.

Having a plastic filter that close to the exhaust manifold gives me the heebie jeebies......... Metal more better.

From the front pages of the Plymouth Service Manual: You're bound to have a service manual for your car.......but juuust in case you don't: https://www.rockauto.com/en/moreinfo.php?pk=10593924&cc=1486874&pt=10335&jsn=379&_nck=WBKHhreJM44JUrfLGZGGZPRSwAK6bnIDtbWzPnJK%2BoY0TPW1OI%2FT7dTgoJk%2BSIHCz%2FtZIli7hQZ4ll1B9RzORH0K7u9dCrrEXVEotVYXdSU4W3W%2B1s9l0m0roMK4U%2FXHV6pOZtjSU4KQEFxZgE9SN%2F2NEVJI64EAKeib6rMyye64jBGnf0P%2FNubNXOef33488UoFQtVBxiJcynuL7c4DffXzKItzk9MMLrQXdgvSa%2Fg68gQEY1h3CWdwmALz9oaOwQYhQ1DsiX8fDakDfZRn4GQXlefBylRqPu5tTItM4i3z%2F5WZCa8BBtmUpSckcw%2B4

Got the SLS40 mechanical stoplight switch installed, it works just as I was hoping it would. The install was simple, I removed the floorpan to make it easier to access but it can be done with the pan in place if an extra set of hands are available. When the pedal is depressed the switch arm rotates and closes the switch turning on the lights. They activate after about an inch of pedal travel well before the master cylinder kicks in. I like it. I intend to remove the new pressure switch (which didn't work as I wanted it to) to eliminate the possibility of the switch developing a leak like the old one did. The wires going to the old switch are long enough to reach the mechanical switch with no splicing necessary. I'll just need to remember to disconnect the wires from the switch if the floorpan needs to be removed.

I had to replace the float while returning my P15 to road service. I purchased a hollow plastic float from Mike's Carburetor Parts, it works well but it seems Mike's only offers a brass float now (for less $$$'s than I paid). https://www.carburetor-parts.com/carter-ball-ball-brass-float-fl2000 A heavy float can cause all sorts of carb issues, a new one is an easy repair.

This a non-pressurized system, it has an open vent and the cap won't hold pressure regardless of how it's rated.

Fill it up with water and see if it leaks?

True, but I like being able to set exactly when the lights are activated.

That is the same switch I have coming. And I'm going to a mechanical switch for the same reasons you did. The way drivers tailgate these days I want to give as much warning as possible that the P15 is about to have its great speed arrested. ?

I recently replaced the switch due to leakage. But I don't like the new one, erratic and requires too much pressure to activate. I'm going with a mechanical switch so I can set how much pedal travel turns on the brake lights. I want the lights to go on with very little pedal travel. This will require fabricating a bracket under the floor but should be worth the effort. I'll replace the present switch with a pipe plug so leaks won't reoccur. To address the original question, I didn't need to bleed the brakes after replacing the switch. I had the switch ready to go and quickly swapped out the switches with very little loss of fluid.

The mercury switch comments had me going back for a second look at the photo. I also assumed there was a plunger activating contacts but instead the entire fixture appears to be spring-loaded and hinged so the pushrod tilts the fixture down as the hood closes. The mercury switch detects the tilt and opens the circuit. Clever!

Borescope cameras are so inexpensive they can be part of anyone's tool kit. Below is the latest one I purchased to inspect the interior of aircraft airframes. This particular camera connects to your phone via wi-fi so you can view and capture video and still photos. I used a similar one to look inside the P15 tank and saw that what appeared to be alien lifeforms had taken up residence in the tank and it was too far gone to waste any time on it. The fuel sender was corroded into a solid mass. https://www.amazon.com/gp/product/B07C9C6P5D/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

You need to add either (or both) a DC test light or a multimeter to your toolbox, many uses around our old cars. Ground one end of the light and use the probe to find the hot terminal. https://www.harborfreight.com/612v-circuit-tester-with-5-ft-lead-63603.html?utm_source=google&utm_medium=cpc&utm_campaign=12144811130&campaignid=12144811130&utm_content=117789286078&adsetid=117789286078&product=63603&store=3256&gclid=CjwKCAjws7WkBhBFEiwAIi16870gqGlSJagQZbKOzQjTkxN6astH4vcz9SnGfNVFuse7UoZcjXoYXRoC-A4QAvD_BwE

Using an oil filter? Detergent oil?

Impressive! Great mix of traditional and modern tech.

?

OK, so the seat is part of the fitting. Guess that's what I was thinking about when wondering if permanently attaching the fitting was a good option.

You're probably correct, been awhile since I've had mine apart.