MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGB Technical - Fuel Pump vent hoses...go where?

Well, the new fuel pump is working just fine on the 70 MGB...just now getting around to thinking about those two vent hoses (one on the end and another close to the blad connection)...where do they go? What purpose do they serve?

Thanks in advance,


DaveL
dave lackey

On my 73 they both come up into the boot near the right rear corner. Both terminate in a plastic washer system Tee (different sizes), one on the shelf as it enters the boot and one is extended up the harness to near the top of the boot. Clausager p28 has some photos.
Paul Hunt 2

Thanks, Paul...
It seems that I cannot find the source of the petrol odor and when I replaced the fuel pump, I started thinking that just maybe these or one of these hoses is the culprit.

Best regards,

DaveL
dave lackey

Dave, you should not get petrol fumes from these hoses, if you do it is likely that the diaphram in the pump is leaking. The hoses are there to vent the pump so that the diaphram does not build pressure in the pump as it moves during oeration. If you don't install them water and dirt can get into the pump when driving in wet conditions.
John H

Dave - I just finished writing an article regarding the venting of the SU fuel pumps in the MGBs, but haven't gotten it onto a web site yet. E-mail me and I'll send you the article (I thought I had your e-mail address, but can't find it anywhere). To answer your one concern, the fuel smell is not coming from that vent unless you have a ruptured diaphragm, in which case you would have other problems with the pump. Cheers - Dave
David DuBois

Common sources for a fuel smell in the boot are pin sized holes in the top of the tank, the tank vent hoses need to be replaced or connected to the evap system.
Kimberly

I forgot to mention the rubber hose that conects the fill pipe to the tank.
Kimberly

Hmmm...
okay, not the vent pipes on the pump. Seems I mostly smell gas right after I put gas in (not top-up, mind you). And then, I usually only smell it when the driver's window is open...closed, it goes away, so it must be suckin in from somewhere?

Dave D.

I will send ya the email addy.

thanks again...


Octagonally sniffin',

DaveL
dave lackey

To further this mystery...

Let's say it IS the fuel tank...seems that I checked with Moss and they do not have replacement fuel tanks...

Soooo, what the heck does one do?

Best regards,

DaveL
dave lackey

Dave

Lots of info in the archives, including some references to SS tanks. I don't have a link to any suppliers for the SS tanks. Just looked at the Victoria British online catalog and they list the tank for about $250.

Aother option may be to have your tank cleaned and sealed.

HTH

Larry
Larry Hallanger

Hey, thanks, Larry!
Haven't dealt with VB in a long time and forgot to check with them.

Will do so this week!

Best regards,

Dave L
dave lackey

Check with Gordon Strickland at the Bhive in Clemson SC first. He'll appreciate your business more than VB, you'll probably have your tank the next day, and he might be cheaper! ;-)
Rob Edwards

Part # 105-215 $199.95 at the B Hive.
http://www.thebhive.com/105MGB70-76gastank.htm

Clifton
Clifton Gordon

New B Gas tanks are readily available on e-bay
BEC Cunha

This thread was discussed between 03/01/2007 and 05/01/2007

MG MGB Technical index

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