The Stovebolt Site Forums The Shop Area Engine Shop 1962 chevy 261 mechanical fuel pump with vacuum??

where do i get one with vacumm on it?any other previous years work?
thanks,dan

Most of the reproduction parts vendors sell them, as do most auto parts stores.

47-62 choices from Classis Parts, for examples.

will this work for my 1962 261? im having trouble finding a dual action for my 1962.
Thanks, Dan



http://www.classicparts.com/1953-57-Double-Action-Fuel-Pump/productinfo/67-912/

nevermind, i think i found the one that will work.

http://www.classicparts.com/1958-62-Double-Action-Fuel-Pump/productinfo/67-913/


Thanks anyways
Dan

Hey all,

I have a 1960 vintage 261 in a 1950 Chevy 3100. i've redone the head and had an initial start of the engine, after verifying good compression, etc., etc.

After the first 30 seconds or so of running however the engine died. I have a glass filter after the tank that looks mostly empty, and a glass filter just before the carb that is also mostly empty. I'm going to check basic fuel flow tomorrow and then check for fuel pressure but I'm pretty sure the mechanical pump is defective. They are cheap enough (around $50) that assuming the other tests are fine I'm thinking of just replacing the pump and see that it fixes it.... fastest and cheapest short term solution. (I'll eventually put in an electric pump, but for now just want to get it running).

Anyway, does anyone have specific recommendations on a specific brand, or even the series of fuel pumps that might work (year range, 216/235/261, etc.).

I believe the following item from Classic Parts is the ticket, but they are out of stock, so hoping to find one locally at Auto Zone, Advance, or Rileys... but not holding my breath..
https://www.classicparts.com/1958-62-Fuel-Pump-6-Cylinder/productinfo/82%2D213/#

All feedback appreciated.

Joe

I check the flow from the tank to the pump by simply disconnecting the line at the pump and lowering the line to a pan. Gravity does the trick.
Electric fuel pump pressure needs to be 3.5 to 4 psi and avoid anything higher than 5 psi. High pressure will overcome the fuel valve (needle valve) of the carburetor.
All NOS (new old stock) fuel pumps have to be rebuilt with Ethanol resistant parts in order to run Ethanol gas (E10). The original diaphragms fail quickly.

1971 Master Parts Lists (6 cyl.):
1958-62, Double action, AC 4666, GM part number 5621673
1958-62, Single action, AC 4434, GM part number 6415726

Around 1954-55, the government directed car/truck manufacturers to stop using glass (fuel pumps, fuel filters, carburetor bowls etc.) because of gas bombs during collisions.

AC Delco stopped making the mechanical pumps decades ago so what is available today may be clone parts.
If you want certainty, find a good used pump and search for a classic fuel pump restorer.
Most people go to their FLAPS and then fuss because the pump doesn't look like the old one and/or the fuel lines have to be replumbed.

One more thing, those who have tried the dual action pumps have reported that they are disappointed that it doesn't improve the vacuum wipers (still stop during acceleration and going uphill).
Wiperman.com. Just like worn piston rings losing compression, old vacuum motors leak vacuum and need a good rebuild.
If you are still not satisfied look into a vacuum assist (electric motor, reservoir and vacuum level switch) like the Electro-Vac made by Trico. Hard to find but it may give you and idea on how to make your own system.