Re: V4 fuel pump diaphragm; supposed to be one spring or two?

Home Forum Ask A Member V4 fuel pump diaphragm; supposed to be one spring or two? Re: V4 fuel pump diaphragm; supposed to be one spring or two?


frankr

US Member - 1 Year (includes $3 online payment fee)
Replies: 6715
Topics: 51
#70583

It indeed takes two springs, different lengths. The upper one in the picture is the chamber that does the actual pumping. The lower chamber is called an air dome, and it’s function is to smooth out the individual pumping pulses.