BMC 1.8 Fuel Pump

[pete.i]

Hi

 

If it is the throttle/stop lever part of the pump that is leaking this is a fairly common occurrence with these pumps now. Various theories have been put forward as to why they are leaking the most favored theory is bio fuel causing the o ring seals to leak. I have just done mine and it is a fairly easy DIY job. As was mentioned Monkey 1 has a post reference this problem but he has taken his pictures down but I have copies of the pictures.

 

http://i1070.photobucket.com/albums/u492/pete-i1/image002.jpg

 

http://i1070.photobucket.com/albums/u492/pete-i1/image008.jpg

 

http://i1070.photobucket.com/albums/u492/pete-i1/image006.jpg

 

http://i1070.photobucket.com/albums/u492/pete-i1/image004.jpg

 

View those pictures in relation to the parts of Monkey 1s post.

 

Complete gasket/o ring kits can be bought off Ebay for about £20 ish. Obviously if you are not going to do a full refurb of the pump and that is best left to the experts, you wont need the whole kit but the two offending o rings are in that kit. Having said that the o rings should be available on their own. I bought a big box of various sized o rings from Aldi for a fiver I think it was.

 

Pete

 

Hm dunno why the piccies are not showing but the links work.

Edited March 10, 2014 by pete.i

[Tony Brooks]

The information I obtained was that it is the removal of sulphur from the fuel that has allowed the seals to shrink back to their original size so they now leak. As we got added bio at the same time as low sulphur fuel I suspect its the bio that got the blame.

 

Anyone who worked on those AC fuel pumps will remember how if the cap seal came out it was almost impossible to put it back because it had swelled. I was amazed that the last one I looked at just dropped out and back in again. maybe it was a new one of a different material but looking at the age of the engine I rather doubt it.

 

IP24, if you do attempt this yourself please observe fanatical cleanlinesses and do not use rags or paper that may leave fibres on the parts. The bit hanging down in the first picture is the governor valve that when operating is finely balanced between spring force and fuel pressure so it can stick. I also think that when you remove the hold down bolt and pull out the lever spindle the governor assembly may drop out so take a little care. The job is not difficult for anyone with a modicum of hand skills.

[Flocal]

Looks like it's leaking all the time now and not just when the stop cable is pulled!

[Tony Brooks]

Looks like it's leaking all the time now and not just when the stop cable is pulled!

 

Yes, just as before a worn O ring but more worn now. Either get the O ring changed or the pump overhauled. I would be tempted to get the pump overhauled because similar things will be happening to the main shaft seal and when/if that leaks it fills the sump with diesel (see recent runaway thread!).

Edited December 9, 2014 by Tony Brooks

[Flocal]

Ok..I think I've found somebody who will remove it for me, and a specialist in Swindon. And then same guy to refit and time.

My problem is Christmas, new licence in January equals no cash. No pump means no power....so looks like I got to wing it until March when hopefully the sun will provide the solar and I won't be as reliant on the engine.

Bugger