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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: 5B Steve on October 22, 2011, 01:21:50 PM

Title: Fuel pump ?
Post by: 5B Steve on October 22, 2011, 01:21:50 PM
Hey guys ,if a 671 fuel pump mount is not sealing,would  it cause air in the fuel system?            Steve 5B...
Title: Re: Fuel pump ?
Post by: bevans6 on October 22, 2011, 01:24:32 PM
No.  It will cause an oil leak, though. 

Brian
Title: Re: Fuel pump ?
Post by: Busgeek on October 22, 2011, 03:27:41 PM
Brain is correct.  Bus geek.
Title: Re: Fuel pump ?
Post by: JackConrad on October 22, 2011, 04:34:14 PM
Would have to be a leaking fitting on the fuel supply line to allow air into the system.  Jack
Title: Re: Fuel pump ?
Post by: Geoff on October 23, 2011, 08:33:57 AM
Where and what is it leaking?  And yes, you can get air in the fuel through the fuel pump shaft seal.
Title: Re: Fuel pump ?
Post by: 5B Steve on October 23, 2011, 06:45:59 PM
Quote from: Geoff on October 23, 2011, 08:33:57 AM
Where and what is it leaking?  And yes, you can get air in the fuel through the fuel pump shaft seal.
I did notice there is an opening on the bottom of the pump less 1 red cap.Maybe that is where the problem might be.

Steve 5B.....
Title: Re: Fuel pump ?
Post by: Geoff on October 24, 2011, 06:16:14 AM
Don't plug the hole-- it is a weep hole so if the outer seal goes bad the fuel doesn't go past the inner seal and into the engine oil.  If the pump is leaking you need to replace it. 
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