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47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

Secondary Fuel Pump TD6

Was out this morning in the FFRR and back home, switched the engine off and half an hour later went to start it again, it just turned over. A quick look under the bonnet at the fuel pipes and they all looked full with no air bubbles, so off with the cover plate for the secondary fuel pump (just in front of the n/s rear wheel) and switched the ignition on, all was quiet so a soft tap with the spanner brought it back to life.

Will be fitting a new pump tonight, so may post some pictures

12th Jul 2012 10:19am

kingpleb

Member Since: 07 Jun 2011
Location: Maybe here. Maybe there, I get everywhere!
Posts: 8455

Are you going to disect it? if somethings sticking how clean is the tank as if its just sucked some gunk thru that could have stuck in it and the tap has dislodged it or repaired a loose connection??

I know its mitigating the risk failure after a repair but root cause analysis is the best way to go to me FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

12th Jul 2012 11:12am

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

I may dissect just to see what is inside. Most likely the pump is worn as it looks to be the original Pierburg BMW part

This is the original Pierburg BMW pump

Click image to enlarge

The pump is located just in front of the off side rear wheel under a plastic cover. There is no need to remove the complete cover as there is an inspection cover underneath held on with 2x10mm bolts

Click image to enlarge

Once the inspection cover is removed you have access to the pump which is held in place by two phillips head screws
One pipe to the front and one to the rear and an electrical connection to the front

Click image to enlarge

The hose clips are of the type that are a swine to work with so I removed them and fitted fuel line clamps size 12-13mm which made refitting a lot easier

Click image to enlarge

Once everything is reconnected start the engine and check for leaks

Click image to enlarge

Refit the cover, job completed

Click image to enlarge

12th Jul 2012 9:55pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

Yes there will be fuel drips out of the lines. Yes the said fuel will run down your arm onto your clothing, the floor/driveway and make you smell like an HGV mechanic

12th Jul 2012 9:57pm

Cam-Tech-Craig

Member Since: 04 Aug 2011
Location: Gloucestershire
Posts: 16165

2015 Range Rover SVAutobiography SDV8 Loire Blue

kingpleb wrote:
Are you going to disect it? if somethings sticking how clean is the tank as if its just sucked some gunk thru that could have stuck in it and the tap has dislodged it or repaired a loose connection??

I know its mitigating the risk failure after a repair but root cause analysis is the best way to go to me

Clean it out using petrol... Works for cleaning diesel off/out of most things...

Craig

12th Jul 2012 11:08pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

The pump is a common failure on the TD6, so at 124k miles I think it makes sense to replace

12th Jul 2012 11:50pm

JOKER

Member Since: 11 Sep 2008
Location: Sconnie Botland
Posts: 15876

Admit it you are just rebuilding that car from scratch

12th Jul 2012 11:51pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

Feckin feels like that Mick

12th Jul 2012 11:55pm

JOKER

Member Since: 11 Sep 2008
Location: Sconnie Botland
Posts: 15876

That must be the only 124,000 mile new car that I know of

13th Jul 2012 12:03am

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

Once I get it the way I want it I'm going to sell it

13th Jul 2012 12:19am

stan
Site Moderator

Member Since: 13 Jul 2010
Location: a moderate moderated moderator moderating moderately in moderation
Posts: 34906

nice little 'how to' there john, thanks for the info.. ... - .- -.

click link for ,

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13th Jul 2012 9:28am

Joe90

Member Since: 29 Apr 2010
Location: Hampshire
Posts: 6399

Ah, memories of the SU electric fuel pump on my 1965 mini traveller. Often amused my passengers when I had to jump out, hit under the rear of the car with a hammer, jump back in and start up and away

At least they have made it accessible on the FFRR .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

13th Jul 2012 9:38am

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

kingpleb wrote:
Are you going to disect it? if somethings sticking how clean is the tank as if its just sucked some gunk thru that could have stuck in it and the tap has dislodged it or repaired a loose connection??

Dissected the pump tonight, there are two filters inside, one at each end, no dirt was present in any of the filters. I would hazard a guess that the pump had run its course and the lifespan just about expired but I will have a closer look tomorrow and will post up some pictures.

14th Jul 2012 9:49pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

As suspected there really isn't much to see and certainly nothing that looks to cause the pump to stop. I can only guess that the electric motor has reached the end of its life.

Click image to enlarge

Last edited by 47p2 on 15th Jul 2012 2:38pm. Edited 1 time in total

15th Jul 2012 12:41pm

47p2

Member Since: 05 Oct 2010
Location: Gone Beyond, Subaru
Posts: 8048

I've now stripped the motor right down, the commutator is worn out and the brushes are very low so this is the problem with the pump when it stops working

Click image to enlarge

I have to presume the commutator should be level across its full width and if you look at the picture below the brushes have worn all the metal away and worn through to the insulation below

Click image to enlarge

I must admit I have never seen a commutator worn through before, the brushes must be made of a very hard material.

15th Jul 2012 2:38pm

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