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MG MGB Technical - Facet Fuel Pump

Morning Folks
I have just fitted a Facet silver top fuel pump to my mgb roadster and noticed it ticks even when not pumping fuel. ( I have even put my finger over the supply pipe to the carbs, so there is no leakage)
My old standard SU pump stopped ticking as sooon as pressure was reached.
Do I have a faulty pump or is this a characteristic of these pumps?
Your help would be appreciated.
Regards
Dave Tetlow
D M Tetlow

David, it's normal for that type fuel pump to keep on ticking. If it stops ticking you have a problem.

Clifton
Clifton Gordon

Yep! As Clifton said, it should constantly tick as long as it has power. You should notice it get quieter when the fuel system is pressurised (i.e. the bowls are full and the needle valve are shut).....

HTH!
Rob Edwards

Thanks Clifton and Rob.
Regards
Dave
D M Tetlow

Dave - The Facet pumps have a by pass valve in them that sets the outlet pressure and is also the cause of the pump running continually. If you don't like listening to the constant noise, then mount the pump on some sound mounts. Sound mounts are available from Pegesus Racing at: http://www.pegasusautoracing.com/advcat.asp?CategoryID=AIRFUEL
There are also sound mounts available from Mercedes parts departement, but I don't know the part number to ask for.
Cheers - Dave
David DuBois

This thread was discussed on 19/08/2006

MG MGB Technical index

This thread is from the archive. The Live MG MGB Technical BBS is active now.