Single pipe fuel pump return line?

Need technical Q/A then you're in the right place

Moderator: martauto

User avatar
johnmaccow
E30 Zone Regular
E30 Zone Regular
Posts: 351
Joined: Mon Aug 23, 2010 11:00 pm
Location: Gateshead

Post Thu Jan 12, 2017 10:32 am

I bought my E30 as a rolling 318i auto shell and was missing the fuel pump, bought one which only has feed pipe on top of it and now learned there are 2 types.
My tank has a dent on the bottom but appears solid still, am I best just replacing the pump housing or is there another way of routing the return line back in the tank?
milescook
E30 Zone Camper
E30 Zone Camper
Posts: 1285
Joined: Thu Jan 13, 2011 11:00 pm
Location: The 'bran of Cwm

Post Sun Jan 15, 2017 10:42 pm

Is it just a pump on it's own? I have a pump with the cradle and foot with one feed pipe for sale here http://www.ebay.co.uk/itm/232204517032? ... 1555.l2649

It's from a 320

http://www.e30zone.net/e30zonewiki/inde ... #Fuel_Tank
The story so far... http://www.cookracing.co.uk/

Also please help the race budget by watching some videos :) https://www.youtube.com/cookracinguk
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49359
Joined: Mon Jan 10, 2005 11:00 pm

Post Sun Jan 15, 2017 11:37 pm

milescook wrote:Is it just a pump on it's own? I have a pump with the cradle and foot with one feed pipe for sale here http://www.ebay.co.uk/itm/232204517032? ... 1555.l2649

It's from a 320

http://www.e30zone.net/e30zonewiki/inde ... #Fuel_Tank
That's the type he has (for the 63 litre tank, which has a fuel return port on the side as part of the fuel transfer system).
He needs one that has the return pipe on the pump cradle for the 55 litre tank he has.
It wouldn't be too technically challenging to drill the top of the tank cradle and add a return pipe that drops fuel into the anti surge cup at the bottom of the tank, or even add the external bit to the blanked off pipe that's already there, but there must be plenty of two pipe cradles around (it's not like anything is likely to go wrong with them, unlike the pump that they carry), so an ad. in parts wanted would be the way to go.
User avatar
johnmaccow
E30 Zone Regular
E30 Zone Regular
Posts: 351
Joined: Mon Aug 23, 2010 11:00 pm
Location: Gateshead

Post Sat Jan 21, 2017 8:16 am

Going to go up and take pump and carrier out and look at adding return pipe to it, thanks for that Brian.
Eventually want fuel cell in the boot so as long as it works for now to finally get it up and running il be happy.
DanThe
E30 Zone Team Member
E30 Zone Team Member
Posts: 28649
Joined: Sat Sep 10, 2005 11:00 pm
Location: Staffs

Post Sat Jan 21, 2017 8:39 am

The only part about adding a pipe I didnt like was the plastic insulator around the electrical connection, with welding or brazing it would definitely melt and probably leak afterwards
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49359
Joined: Mon Jan 10, 2005 11:00 pm

Post Sat Jan 21, 2017 9:57 am

DanThe wrote:The only part about adding a pipe I didnt like was the plastic insulator around the electrical connection, with welding or brazing it would definitely melt and probably leak afterwards
I'd be looking at using something like this: https://www.bes.co.uk/pipes-tubes-fitti ... ?size=8_mm