Re: 1948 288 engine fuel pump stopped working.

Posted by HH56 On 2024/6/12 11:08:35

The little "tower" is an air chamber and was there to smooth out the pump pulses in fuel going to the carb. Principle was the same as an air chamber in house plumbing that is there to reduce knocks or bangs when a valve suddenly closes. It was thought a smoother fuel flow would be less likely to leak past the needle valve but was found not to be really needed and was dropped during 51 or 52 production. Only thing to be careful of without the chamber is that the unused port where the chamber used to thread into has a well sealing plug. Sometimes rebuilt pumps come back without anything in that port.