Mechanical Fuel Pump

Standard & electronic conversions

Mechanical Fuel Pump

Postby Lurch » Mon Dec 12, 2016 9:05 pm

I assume I could fit a mechanical fuel pump directly onto a 1098 engine by simply removing the blanking plate and bolting one on from a mini or something?
Or have I missed some vital snag here ?
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Re: Mechanical Fuel Pump

Postby Panky » Mon Dec 12, 2016 10:31 pm

As long as the camshaft has the lobe it would work, but not sure about the lobe. Probably is one but best to check - and make sure it will fit behind the manifold too.
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Re: Mechanical Fuel Pump

Postby Lurch » Tue Dec 13, 2016 10:05 am

There's lots of room having just compared with a scrap mini donor.
You'd think all would have the lobe as I can't see they'd tool up for different shafts but good point to check!
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Re: Mechanical Fuel Pump

Postby Panky » Tue Dec 13, 2016 10:06 am

That would be my understanding, but hey if BMC could save a farthing a car on a few grams of metal :?
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Re: Mechanical Fuel Pump

Postby Lurch » Tue Dec 13, 2016 11:04 am

Indeed!
Having said that it probably costs more to have 2 different lines going than just make one shaft fits all!
Will have to get me torch and dentists mirrors out to peer inside the engine!
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Re: Mechanical Fuel Pump

Postby woodywoodchipper » Tue Dec 13, 2016 3:17 pm

it will have the lobe,

same engine used in A35 which were mechanical pump

and 1275 marina,
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Re: Mechanical Fuel Pump

Postby Lurch » Tue Dec 13, 2016 3:24 pm

Thanks for that, it would be a right pain trying to see inside after removing blanking plate and hanging upside down in the engine bay !
I assumed it surely must have it , but good to know for sure.
I will rip the one out of the scrap mini and give it s try, I hate electric anything and would much rather trust a mech pump ( Luddite me ) though the pump in my other moggy has never actually died on me, Yet !
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Re: Mechanical Fuel Pump

Postby Panky » Tue Dec 13, 2016 4:59 pm

Check the diaphragm before using it, you wouldn't want a sump half full of petrol :shock:
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Re: Mechanical Fuel Pump

Postby NorfolkVan » Tue Dec 13, 2016 9:22 pm

Lurch wrote:I assume I could fit a mechanical fuel pump directly onto a 1098 engine by simply removing the blanking plate and bolting one on from a mini or something?

You may need the black spacer in between the pump and block. I did on mine.
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Re: Mechanical Fuel Pump

Postby Lurch » Tue Dec 13, 2016 9:41 pm

The spacer would be on the pump as fitted to the mini would it?
And I'll be sure to check the diaphragm is OK too!!!
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Re: Mechanical Fuel Pump

Postby NorfolkVan » Wed Dec 14, 2016 6:13 pm

Yes, I think I got mine off of a mini but used a new pump. It was a Moprod FP53 for a Marina (from memory). I do worry though when people mention the possibility of the diaphragm leaking petrol into the sump and what that would do. Maybe there is a later design of mechanical pump that dumps petrol somewhere else in the event of a leak. It does seem a bit of an achilles heel. :(
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Re: Mechanical Fuel Pump

Postby Lurch » Wed Dec 14, 2016 7:16 pm

Well tbh I've had loads of similar mech pumps on many old Land rovers over the years, and not had one leak petrol into engine myself...
.. tho I have heard of it happening so a valid point well made.
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Re: Mechanical Fuel Pump

Postby NorfolkVan » Thu Dec 15, 2016 8:46 pm

Just had a quick look on the minispares forum and there is mention of a drain hole underneath the pump to let escaped fuel out if the diaphragm is leaking, so check this is clear. There was also mention of getting the correct travel on the pump lever. I think I did a test fit without the spacer and slid the pump on the studs to determine the point at which it picked up on the cam and how much the cam moved it when rotated etc.
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Re: Mechanical Fuel Pump

Postby Lurch » Fri Dec 16, 2016 8:33 am

All good stuff to be aware of gents, thanks for all the input ! ;)
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