The 'E' Type Forum

I'm some distance away from needing to install one but has anyone fitted an in-tank fuel pump C19919, normally used by a series1 3.8 to a series 1, 4.2. If so, were there any issues. Capacities look fairly similar although the intank is slightly higher.

Many thanks

Alun

Been running an in tank fuel pump for over five years no issues touch wood

Hi Alun
I think, historically, the pump changed when the 4.2 was introduced to give greater fuel delivery because the 3.8 pump was marginal at sustained engine RPM.
I don't know for definite, but I think the in-tank pumps being offered today have a better delivery rate than the original. I converted my 3.8 to a 4.2 external pump because, at the time, replacement submerged pumps weren't available but I can't speak of the quality or suitability of today's offerings because I have no experience of them although I have a deep distrust of most aftermarket Jaguar parts.
If you have all the pipes and hardware in place, why not stick to the external pump? It's a lot easier to maintain than the submerged pump.
Regards

Hi Stuart,

The project I inherited has zero pipework so I'm in the position where all options are open.

My question is aimed at fuel delivery at both high and low speeds.

I assume one of the benefits of in-tank is a lack of fuel smells within the boot although I'm aiming to manage the smells by using Anc fittings and hoses. Not original I accept but far safer.

Alun

There are no benefits to using an in tank fuel pump as configured by Jaguar. They moved to an external pump - a tried and tested SU of sufficient capacity - as soon as possible, and you should do the same.

Fuel smells should not be linked to pump position. With appropriate quality hose and fittings, neither solution should be the cause of any petrol leaks. Tank fittings and cork gaskets, regardless of pump style are the much more likely source of petrol smells.

This is the original 3.8 submerged fuel pump:


SNGB sell an in-tank submersible fuel pump based on one used in later Jaguars. They work well in terms of delivering fuel but the motor runs continuously and in the FHC it can be irritating although road and engine noise usually cover it up.


Best option would probably be to use the later 4.2 SU pump which fits into the RH rear well cavity.

Go for the electronic version rather than the mechanical point which have been known to fail after periods of inactivity.

More info on the submersible pump: viewtopic.php?f=3&t=4855