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MG MGB Technical - Need urgent help with MGB Mk1 fuel tank

Hi, have had real problems with my car cutting out over the last few months. Have done everything with the electrics, fuel, carbies etc and thought we had finally pinned it down to a faulty fuel pump.
Still problems!

My mechanic has now pulled the fuel tank out and beleives there is some blockage in the tank itself? He says there is actually like a filter inside the tank at the bottom that you can only get to if the tank was pulled apart and this appears to be clogged?
Also he beleives the steel baffles are loose but doesn't beleive this to be of great concern.

I haven't had much experience with fuel tanks and haven't seen many problems posted here on the forum.
has any one had any experience here? Does it sound like a viable reason for my problem. While I have just rebuilt the engine, and a new tank would be money well spent, I have spent so much money on trying to sort this intermittent problem out I am really reluctant to spend any more if not necessary.

Really appreciate any opinions

(Have already made sure the cap isn't blocked)
Craig

Craig

It is possibly the cause of your problem. Have you removed the tanks to see if you can see in there with a mirror and perhaps use compressed air once the tank is dry?

You may be able to see it if you remove the fuel guage sender unit.

cheers
Ian Buckley

I am absolutely no expert but what you maybe can do is put some high pressure air at the hose towards the tank (right at the fuel pump connection) to get the filter clean again. I know that's what they did with my car ;) But at your own risk!
A.J. van Donselaar

Craig ,

Renou

Craig ,

On an MK1 B,and with "watered" petrol that might explain your fuel tank intake collapse. High pressure air the reverse way should clean it up. But not sure there is a filter inside the tank itself, but for sure there is a trainer. That done, you turn the tank upside down and verify on a paper for debris output .As described in the workshop book, you may then
verify the pump flow output before remounting all components.
Good luck .
Renou

Hmm. I removed and "slushed" my tank some years ago to very good effect (pin-holes from being clobbered by rocks on dirt roads). I don't remebger any baffles as such but there may be stiffeners in the tank to keep it from ballooning/oilcanning.

There is no filter.

Back flushing should clear any obstructions and then sluice out the tank. Cleaning, etching and slushing would give you a whole "new" trouble free tank.

mike!
mike!

There is a strainer (filter) inside the tank.
http://hem.passagen.se/larsragnar/
page MGB Turbo
Ingemar

You stated that you had finally pinned the problem down to a fuel pump, but then spoke about the gas tank. A Freudian slip ?? Did your guy really test the fuel pump? Sure sounds like the typical SU intermittent problem!
Ron Rosen

I bit the bullet and bought a new gas tank. That must be all of the electricals and fuel system I have replaced!

I'll change the doors next and see if that helps!

One more problem and she gets pushed over a cliff
Craig

Hello Craig,


"One more problem and she gets pushed over a cliff "
Sorry not be there to get the spares: overseas distance
prevents of .
( Humour )
Renou

This thread was discussed between 06/07/2004 and 07/07/2004

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