Lotus Elan

Fuel pump leaking

PostPost by: Elseezed » Sat May 01, 2021 4:38 pm

Only just replaced fuel lines to E10 standard, filled fuel tank to find fuel leaking from underneath the fuel pump. Ordered replacement pump and rebuild kit.
Some tips that helped:
Removing vac hose and the fitting from inlet manifold
Removing lower stud from No4 inlet manifold
Raising fuel supply pipe
Refitting:
Ensure cam is at its lowest point
Attach breather hose and throttle spring when refitting backplate
Set new rubber thackery gaps with a 2mm drill and a mirror to see lower ones.
Hope it helps Les
IMAG0948.jpg and
Access to fuel pump

IMAG0952.jpg and
New pump
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PostPost by: elanner » Sun May 02, 2021 11:35 am

How did you get that much space between the pump and the sidewall of the engine bay? My pump is almost touching.

Or is it a +2 (I assume there's more space in a +2)?

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PostPost by: Elseezed » Sun May 02, 2021 12:29 pm

It is a +2 Nick. Read somewhere the elan has an hole in the body for access.
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PostPost by: pharriso » Sun May 02, 2021 12:50 pm

Elseezed wrote:It is a +2 Nick. Read somewhere the elan has an hole in the body for access.

Yes, it does....
IMG_2741.jpg and


I initially thought it was a previous owner's hack...
IMG_2739.jpg and
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PostPost by: elanner » Sun May 02, 2021 3:19 pm

Phil,

That's interesting - I think it is a previous owner's hack! There's nothing about an access hole in the manual or in Brian Buckland's book (that I can see).

Nevertheless, if the time comes an access hole seems to be the best way to get to the pump.

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PostPost by: mwhitaker » Sun May 02, 2021 6:51 pm

I think Phil is right- I just checked my 69 S4 Elan LHD and it has a grommet filled access hole that looks the same-never knew it was there!

Cheers, Mark

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PostPost by: gjz30075 » Sun May 02, 2021 7:11 pm

Same hole on my '72 Sprint.
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PostPost by: persiflage » Mon May 03, 2021 9:02 am

No grommet in my 1972 Sprint .... but I do have a hole :D
I’ve learned something already today.
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PostPost by: ericbushby » Mon May 03, 2021 10:21 am

I can`t find a hole in my 1967 S3, and I have changed the fuel pump some time ago.
Does it go through to the footwell.
Maybe it is a later modification.
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PostPost by: elanner » Mon May 03, 2021 11:23 am

ericbushby wrote:I can`t find a hole in my 1967 S3, and I have changed the fuel pump some time ago.

How did you get it out? (This must be discussed elsewhere in the forum, but while we're on the topic.....)

ericbushby wrote:Maybe it is a later modification.

Yup, I think you must be right. No hole on my current or previous Elans (two S4s & one S3).

Can somebody reply with the needed hole size? I think I have a pump change in my near future.... :-(

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PostPost by: rgh0 » Mon May 03, 2021 11:46 am

No hole on my 1968 early S4 so sounds like it was introduced in 1969 ?

cheers
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PostPost by: ericbushby » Mon May 03, 2021 12:13 pm

Hi Elanner
It is a few years ago now so I do not remember the details.
I suspect it involved removing the engine mounts and supporting the sump on a jack. The engine will not move far to the left but a bit more up and down.
It was an all metal pump which was replaced with another metal one. The carburettors had to come off I know.
I also have a bad habit of cutting spanners to fit the space available. I am gathering quite a collection of short, bent and ground down tools. I buy tools at car fairs and boot fairs if they are good quality and very cheap.
Best of luck.
Eric in Burnley
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PostPost by: Mazzini » Mon May 03, 2021 4:41 pm

Was the access hole just on LHD cars? I don't recall ever seeing one on a RHD Elan.
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PostPost by: pharriso » Mon May 03, 2021 6:17 pm

Nick, it’s really not that tight... I changed my pump a couple of times without using that access hole... Having said this I assume that you are going to remove the airbox & carburettors to get to it?
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PostPost by: elanner » Mon May 03, 2021 10:43 pm

pharriso wrote:Nick, it’s really not that tight... I changed my pump a couple of times without using that access hole... Having said this I assume that you are going to remove the airbox & carburettors to get to it?


Phil,

Thanks, that's encouraging. I would indeed remove the airbox and carbs first. Right now I'm still hoping that I don't have to remove it - but clouds are gathering. Troubleshooting in progress.....

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