Went for a long ride today in my '55 TBird.  The cars runs great with no issues.  When I pulled into the garage I heard a knocking noise coming from under the hood at idle.  I recently changed the heads and rockers, so I thought one of my rockers had loosened up. The knock sounded like it was coming from the fuel pump.  I used a long screw driver and the noise was not coming from the valve train like I suspected.  I could definitely hear it coming from the fuel pump itself.  I shut off the engine to let it cool down and the noise quit.  The pump is an old 292 dual action pump with the vacuum lines plugged. Anyone ever had a fuel pump do this?  I don't need the vacuum. Will a standard FE pump work in my 292?

An FE pump will work.


Lawrenceville, GA

Airtex 6523 is a correct Y-Block Fuel Pump with the Filter in the Bottom.

  

Wonder why the old pump knocks when it heats up?

Because the pump is trying to suck vacuum but can't because the lines are plugged. Knock is the Vacuum diagram snapping back.   

Fuel pump with glass bowl filter on bottom won't fit on '55-'57 Bird because of interference with cross member. They relocated glass fuel filter bowl to top of the engine.

The pump should have a spring that forces the pump arm to follow the eccentric. Sometimes the spring will break or get weak enough that the arm sort of floats. When that happens it will make a knocking sound because the eccentric is coming around and hitting the arm since it isn't in contact with it.

I've seen this many times over the years.

Dave 

Would the pump actually work if this was the situation? Or work incorrectly providing little fuel? 





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

I have the vacuum lines plugged and never noticed any noise





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

    I believe this is the pump that I installed after getting my electric wipers. Hope this helps

   

 

      Roll over image to zoom in                                            Airtex                                      

                                                   Airtex 4208 Mechanical Fuel Pump                                                               

                                                                               4.1 out of 5 stars                                                                   3 customer reviews                                                                                                                                         

---

Price:

$47.50                                                & FREE Shipping. Details

       Only 1 left in stock (more on the way).                                                             Ships from and sold by Amazon.com.                                                                                                           

   This fits your . 
• Enter your model number      to make sure this fits.   
• Precision-cast units designed to meet or exceed OEM specifications
• Special heat treated rocker arms and case-hardened pins to ensure long-lasting performance
• Upgraded seals and pump diaphragms for compatibility with modern multi-fuel blends
• 100 percent tested throughout the entire manufacturing process for worry free, out-of-the-box performance