Fuel Pump
Author
Discussion

mikea4tdi

Original Poster:

307 posts

219 months

Monday 30th March 2009
quotequote all
Trying to refit my fuel pump, the good new is its a new one, the bad news is I'm not sure what fittings I should have for the outlet. I believe the fuel accumulator has a banjo fitting, the outlet of the fuel pump has a long screw thread with the outlet hole half way down.

The outlet can be removed (standard m12 thread) I just need to know what and where to order. I assume I need a m12 banjo bolt thingy, just not sure what its called or where to source.

I also need a small length of fuel hose from tank to pump and would like to know if anyone has fitted a filter between the tank and pump.

Thanks all (with this sorted she should be good to start up!!!!!)

mikea4tdi

Original Poster:

307 posts

219 months

Monday 30th March 2009
quotequote all

mikea4tdi

Original Poster:

307 posts

219 months

Monday 30th March 2009
quotequote all
can anyone confirm weather the fuel pipes are 8 or 10mm. so I can order the correct banjo bolt

Gerald-TVR

4,896 posts

227 months

Monday 30th March 2009
quotequote all
Mike

Be careful with the tank to pump hose it need to be internally steel braided and hardwalled and impervious to petrol, I believe Adrian@ has a supply of the original spec hose. Ordinary hose might be sucked flat and would be very vunerable to road damage.

Elfit

573 posts

234 months

Monday 30th March 2009
quotequote all
Mike
I have fitted a filter between the tank and pump.
http://www.fastroadcars.co.uk/shop/index.php?act=v...
you will need to specify outlet diameter ( which I can't remember at the moment)
This was the only filter that I could find that came with a large enough connection

Tim

phillpot

17,511 posts

213 months

Monday 30th March 2009
quotequote all
Doing CV joints on S3 while back recall seeing some sort of filter ( like an alluminiun can ) but may have been after pump, is that standard ?

Wiz

2,474 posts

244 months

Tuesday 31st March 2009
quotequote all
phillpot said:
Doing CV joints on S3 while back recall seeing some sort of filter ( like an alluminiun can ) but may have been after pump, is that standard ?
On the 2.9 S there is a large filter between the tank and pump, sierra part.

Gerald-TVR

4,896 posts

227 months

Tuesday 31st March 2009
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HTH




ketvrin

3,504 posts

239 months

Tuesday 31st March 2009
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Thats the same setup as mine...

Tank -- 90 degree bend -- pump (with thimble filter) -- Filter -- Regulator -- fuel rail.

I always thought the pump and filter should have been the other way around but...

K wink

phillpot

17,511 posts

213 months

Tuesday 31st March 2009
quotequote all
Nice pictures Norman, so the (replaceable) filter is,if I'm right, the light blue looking thing in second photo, this is after pump but then whats the little right angle fitting before pump, too complicated to just be an elbow surely?
Just had a thought, could it be a non-return valve ?

Edited by phillpot on Tuesday 31st March 19:52

Gerald-TVR

4,896 posts

227 months

Tuesday 31st March 2009
quotequote all
Nope just an elbow I think - will look it out and check

Elfit

573 posts

234 months

Wednesday 1st April 2009
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Yes that is the filter on the second photo, and yes it is after the pump.
The right angle is just a complicated 90 degree bend ( altough I might be wrong). When I took mine off I had a good look at it as I wondered what it was.I couldn't see anything fancy inside.
The bullet filter that I put in went between the tank and the pump.
Cheers
Tim

Gerald-TVR

4,896 posts

227 months

Wednesday 1st April 2009
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I've looked at it and - I've no idea, there is something inside. If you stick a screwdriver in from the pump direction there's something 'springy' inside.

According to the parts list its a 'fuel damper' but not sure what a fuel damper does (except damping fuel and I just dont know what is involved)

According to the Nissan 300zx web site the definition is 'The fuel damper, which consists of a diagram, reduces fuel pressure pulsation in the fuel feed in between the fuel filter and injectors'

phillpot

17,511 posts

213 months

Wednesday 1st April 2009
quotequote all
Mmmmm, "something springy would suggest to me some sort of non return valve. two theories :
1 if low on fuel stops fuel running away from pump, particularly if cornering or braking hard ?
2 don't know what principle the fuel pump works on but most pumps "suck then blow" could it stop fuel returning to tank on "blow stroke", or maybe more likely dampens out any sort of pulsations in the fuel, caused by pump ?

Gerald-TVR

4,896 posts

227 months

Thursday 2nd April 2009
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To clarify fuel enters from tank and leaves to pump. The springy thing is at the back of the chamber and does not impeded the flow ie not a valve. It apprears to be a cushion. Will try to get photos later

ETA Duff photos from as my camera is with my misses in London. Will try some more nest week

Edited by Gerald-TVR on Thursday 2nd April 19:50

Gerald-TVR

4,896 posts

227 months

Monday 6th April 2009
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Good'ish' pics




First two clearly show the chamber with no valve and the pen in the thrird is pointing to the cushion