Bypassing 300 tdi lift pump - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old April 6th, 2014, 10:34 PM
vlocci
Status: Offline
Vin Loccisano
Member
 
Join Date: Oct 2003
Location: Boston,MA
Posts: 71
Bypassing 300 tdi lift pump

After experiencing some fuel starvation indicators i installed an electric lift pump in my 300 tdi. It is before the mechanical lift pump which is still installed.

It solved my concerns but now i wonder if there is a reason to keep the mechanical pump inline.

Can i simply bypass the mechanical pump while keeping it physically installed? This would eliminate the need for a blockoff plate and remove any concerns of a diaphram failure

Vin
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old April 7th, 2014, 01:23 PM
hillstrubl's Avatar
hillstrubl
Status: Offline
Danny
2005 Disco 3
Member
 
Join Date: Mar 2010
Location: Philly, USA
Posts: 1,596
I would think that leaving it in place (and plumbed) shouldn't do anything, the fuel would just go through it under pressure from your electric pump (before) and pulled from the injection pump (after).
Correct me if I'm wrong.

What electric pump did you use?
__________________
~2005 Disco 3 "Moneypenny"
~2008 GTI TSI
~If you can read this, thank a teacher. If you are reading this in English, thank a Veteran.
Reply With Quote
  #3  
Old April 7th, 2014, 01:30 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,237
Registry
You should make sure there is a non return valve in there somewhere or that the electric pump acts as one. The lift pump includes one. It helps prevent fuel back draining to the tank if there is a small air leak.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old April 7th, 2014, 02:54 PM
sonoronos's Avatar
sonoronos
Status: Offline
Ed
None
Member
 
Join Date: May 2010
Location: Arlington, VA
Posts: 5,531
Registry
Doesn't lowering the lever on the lift pump basically disable it?
Reply With Quote
  #5  
Old April 9th, 2014, 08:58 AM
vlocci
Status: Offline
Vin Loccisano
Member
 
Join Date: Oct 2003
Location: Boston,MA
Posts: 71
For those interested, I bypassed the mechanical lift pump without issue. No change in performance.

My reasoning for doing so was a failed diaphragm on a mechanical pump years ago that pumped diesel into the engine case. A real mess and it would have certainly done some serious damage had it not been caught.

Looking to avoid this mess and eliminate something that is not doing a thing I simply eliminated the mechanical pump.

I did leave it in place, rather than fabricating a small cover for the block.

I'm running a very generic facet style pump located near the tank. It maxes out at 7 psi or so and is the typical clicker pump. Makes priming the fuel filter a simple affair.

Vin
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
300 tdi, tdi

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bypassing oil cooler on serp belt trucks? evilfij Defender Technical Discussions 1 August 27th, 2013 09:58 AM
feed 200tdi lift pump from Facet fuel pump ? kjva Defender Technical Discussions 1 September 7th, 2011 01:55 AM
300 tdi water pump housing pendy For Sale - Parts 0 February 3rd, 2009 09:17 PM
Bypassing Engine Imobilization ECU dmarchand Defender Technical Discussions 0 October 3rd, 2007 08:42 AM
Wiring question - bypassing ECU for rear defogger dmarchand Defender Technical Discussions 8 September 30th, 2004 11:21 AM


All times are GMT -5. The time now is 01:39 AM.


Copyright