What's Wrong with This Picture

[Joe C.]

[Mike M.]

Re: What's Wrong with This Picture

valve wasn't staked adequately and fell out of its home.mike

[David D.]

Re: What's Wrong with This Picture

I agree.....

IF my assumption is correct that this is a Fuel Pump.

If not, all bets are off on my 2 cents.

[Dennis C.]

What's Wrong with This Picture

Agree w/Mikie - easy fix...

[Joe C.]

Re: What's Wrong with This Picture

Agree w/Mikie - easy fix...

The dislodged valve is for the inlet chamber of the pump, which means that it has been contacting the stem/diaphragm/retainer saucers all along. I'll post more pictures of what I find when I open up the remainder of the pump, tomorrow.
Believe it or not, the car has been running with this pump, with this condition, for the last 4 years! The pump shown is a replacement 40083, which is altogether different from the real McCoy.
The process started when I investigated a possible lean condition, and premature power peak.
I put a pressure gauge on, and measured 4psi @ idle, dropping to 3 psi @about 4000rpm.
1963 Shop manual calls for 6.5-7.5 psi@ idle.
I have a 1965, which uses a special pump (40083), and the 1965 supplement does not list the specs for the special pump. The pressures might be slightly higher than the 4657 pump used in 1963.
I installed the original core 40083 which I rebuilt over last couple days, and now get 9 psi @ idle!
I wonder if my original problem is solved?
Some dyno testing is in order.

Joe

[Joe C.]

Here's How to Stake Valves in Place

This is how I did it on the original 40083 core which I rebuilt a couple days ago:

[Joe C.]

Re-Mounting the Diaphragm.....

involves separating the old one:

installing the new one:

[John H.]

Re: What's Wrong with This Picture

I installed the original core 40083 which I rebuilt over last couple days, and now get a whopping 12.5 psi @ idle!
I wonder if my original problem is solved.

Joe

Probably, but now you have a new one; ever see a needle and seat that will close against 12 psi?

[Stuart F.]

Re: What's Wrong with This Picture

I'd like to watch the test. Could be interesting.

Stu Fox

[Joe C.]

Re: What's Wrong with This Picture

Probably, but now you have a new one; ever see a needle and seat that will close against 12 psi?

John/Stu,

I used a different gauge, and edited my post above.
The pressure reading is 9psi using the pictured gauge.